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/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:42:41,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:42:41,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:42:41,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:42:41,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:42:41,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:42:41,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:42:41,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:42:41,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:42:41,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:42:41,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:42:41,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:42:41,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:42:41,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:42:41,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:42:41,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:42:41,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:42:41,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:42:41,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:42:41,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:42:41,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:42:41,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:42:41,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:42:41,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:42:41,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:42:41,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:42:41,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:42:41,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:42:41,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:42:41,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:42:41,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:42:41,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:42:41,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:42:41,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:42:41,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:42:41,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:42:41,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:42:41,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:42:41,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:42:41,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:42:41,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:42:41,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:42:41,120 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:42:41,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:42:41,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:42:41,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:42:41,122 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:42:41,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:42:41,122 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:42:41,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:42:41,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:42:41,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:42:41,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:42:41,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:42:41,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:42:41,124 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:42:41,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:42:41,124 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:42:41,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:42:41,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:42:41,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:42:41,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:42:41,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:42:41,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:41,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:42:41,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:42:41,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:42:41,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:42:41,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:42:41,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:42:41,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:42:41,447 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:42:41,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:42:41,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:42:41,467 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:42:41,467 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:42:41,468 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-10-13 17:42:41,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3625a2318/5576f760ac1e4058b960a3920c1f2f38/FLAG99c28878b [2019-10-13 17:42:41,980 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:42:41,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-10-13 17:42:41,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3625a2318/5576f760ac1e4058b960a3920c1f2f38/FLAG99c28878b [2019-10-13 17:42:42,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3625a2318/5576f760ac1e4058b960a3920c1f2f38 [2019-10-13 17:42:42,348 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:42:42,350 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:42:42,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:42,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:42:42,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:42:42,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5370fc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42, skipping insertion in model container [2019-10-13 17:42:42,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,366 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:42:42,385 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:42:42,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:42,599 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:42:42,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:42,638 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:42:42,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42 WrapperNode [2019-10-13 17:42:42,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:42,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:42:42,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:42:42,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:42:42,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... [2019-10-13 17:42:42,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:42:42,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:42:42,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:42:42,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:42:42,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:42,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:42:42,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:42:42,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:42:42,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:42:42,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:42:42,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:42:42,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:42:42,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 17:42:42,840 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:42:42,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:42:42,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:42:42,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:42:42,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:42:42,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:42:42,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:42:42,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:42:43,210 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:42:43,210 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-13 17:42:43,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:43 BoogieIcfgContainer [2019-10-13 17:42:43,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:42:43,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:42:43,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:42:43,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:42:43,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:42:42" (1/3) ... [2019-10-13 17:42:43,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165d7548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:43, skipping insertion in model container [2019-10-13 17:42:43,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:42" (2/3) ... [2019-10-13 17:42:43,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165d7548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:43, skipping insertion in model container [2019-10-13 17:42:43,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:43" (3/3) ... [2019-10-13 17:42:43,219 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2019-10-13 17:42:43,227 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:42:43,234 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:42:43,244 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:42:43,272 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:42:43,272 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:42:43,272 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:42:43,272 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:42:43,273 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:42:43,273 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:42:43,273 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:42:43,273 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:42:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-10-13 17:42:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:42:43,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:43,299 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:43,301 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1272746570, now seen corresponding path program 1 times [2019-10-13 17:42:43,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:43,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415359475] [2019-10-13 17:42:43,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:43,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415359475] [2019-10-13 17:42:43,530 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:43,530 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:42:43,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152060314] [2019-10-13 17:42:43,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:42:43,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:42:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:43,555 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-10-13 17:42:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:43,733 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-10-13 17:42:43,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:42:43,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:42:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:43,745 INFO L225 Difference]: With dead ends: 93 [2019-10-13 17:42:43,745 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:42:43,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:42:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-13 17:42:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 17:42:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-13 17:42:43,801 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-10-13 17:42:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:43,801 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-13 17:42:43,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:42:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-13 17:42:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:42:43,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:43,804 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:43,804 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:43,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1923539238, now seen corresponding path program 1 times [2019-10-13 17:42:43,805 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:43,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315944924] [2019-10-13 17:42:43,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:43,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315944924] [2019-10-13 17:42:43,989 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:43,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:42:43,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924662647] [2019-10-13 17:42:43,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:42:43,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:43,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:42:43,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:43,996 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 6 states. [2019-10-13 17:42:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:44,243 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2019-10-13 17:42:44,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:44,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-13 17:42:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:44,246 INFO L225 Difference]: With dead ends: 68 [2019-10-13 17:42:44,246 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 17:42:44,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 17:42:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-13 17:42:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-13 17:42:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-10-13 17:42:44,260 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2019-10-13 17:42:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:44,260 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-10-13 17:42:44,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:42:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-10-13 17:42:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:42:44,262 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,263 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,263 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash -772301532, now seen corresponding path program 1 times [2019-10-13 17:42:44,264 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100906315] [2019-10-13 17:42:44,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:42:44,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100906315] [2019-10-13 17:42:44,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:44,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:42:44,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409418393] [2019-10-13 17:42:44,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:42:44,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:42:44,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:44,405 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2019-10-13 17:42:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:44,564 INFO L93 Difference]: Finished difference Result 119 states and 157 transitions. [2019-10-13 17:42:44,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:42:44,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-10-13 17:42:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:44,566 INFO L225 Difference]: With dead ends: 119 [2019-10-13 17:42:44,566 INFO L226 Difference]: Without dead ends: 65 [2019-10-13 17:42:44,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-13 17:42:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-13 17:42:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-13 17:42:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-10-13 17:42:44,577 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2019-10-13 17:42:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:44,577 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-10-13 17:42:44,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:42:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-10-13 17:42:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:42:44,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,579 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,579 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash -213249118, now seen corresponding path program 1 times [2019-10-13 17:42:44,580 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753184769] [2019-10-13 17:42:44,580 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:44,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753184769] [2019-10-13 17:42:44,669 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:44,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:42:44,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721991155] [2019-10-13 17:42:44,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:42:44,671 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:42:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:42:44,674 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 5 states. [2019-10-13 17:42:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:44,930 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2019-10-13 17:42:44,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:44,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-13 17:42:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:44,932 INFO L225 Difference]: With dead ends: 115 [2019-10-13 17:42:44,932 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:42:44,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:44,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:42:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2019-10-13 17:42:44,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:42:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-10-13 17:42:44,958 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 36 [2019-10-13 17:42:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:44,959 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-10-13 17:42:44,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:42:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-10-13 17:42:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:42:44,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,963 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,966 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash 25817296, now seen corresponding path program 1 times [2019-10-13 17:42:44,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136566445] [2019-10-13 17:42:44,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:42:45,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136566445] [2019-10-13 17:42:45,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364091692] [2019-10-13 17:42:45,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:45,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:42:45,265 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:45,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:42:45,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703711998] [2019-10-13 17:42:45,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:42:45,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:42:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:45,268 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 7 states. [2019-10-13 17:42:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:45,457 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2019-10-13 17:42:45,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:45,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-10-13 17:42:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:45,459 INFO L225 Difference]: With dead ends: 103 [2019-10-13 17:42:45,460 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:42:45,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:42:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-13 17:42:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:42:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-10-13 17:42:45,469 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2019-10-13 17:42:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:45,470 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-10-13 17:42:45,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:42:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-10-13 17:42:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:42:45,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:45,472 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:45,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:45,685 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:45,686 INFO L82 PathProgramCache]: Analyzing trace with hash -95536050, now seen corresponding path program 2 times [2019-10-13 17:42:45,687 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:45,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614919859] [2019-10-13 17:42:45,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:42:45,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614919859] [2019-10-13 17:42:45,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295810317] [2019-10-13 17:42:45,872 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:45,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:42:45,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:45,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:45,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:42:45,980 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:45,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-13 17:42:45,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864735116] [2019-10-13 17:42:45,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:42:45,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:42:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:45,982 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 8 states. [2019-10-13 17:42:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:46,272 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2019-10-13 17:42:46,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:42:46,273 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-10-13 17:42:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:46,275 INFO L225 Difference]: With dead ends: 129 [2019-10-13 17:42:46,275 INFO L226 Difference]: Without dead ends: 88 [2019-10-13 17:42:46,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-13 17:42:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2019-10-13 17:42:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:42:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-10-13 17:42:46,287 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2019-10-13 17:42:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:46,287 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-10-13 17:42:46,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:42:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-10-13 17:42:46,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-13 17:42:46,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:46,289 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:46,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:46,493 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1296186118, now seen corresponding path program 3 times [2019-10-13 17:42:46,494 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:46,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968998669] [2019-10-13 17:42:46,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:48,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968998669] [2019-10-13 17:42:48,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889810480] [2019-10-13 17:42:48,412 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:48,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:42:48,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:48,480 WARN L254 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-13 17:42:48,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:48,604 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 [2019-10-13 17:42:48,604 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:42:48,618 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:48,618 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:42:48,619 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-10-13 17:42:50,322 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:42:50,333 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:50,334 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-10-13 17:42:50,335 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:42:50,366 INFO L567 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2019-10-13 17:42:50,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:50,371 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:42:50,372 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:36 [2019-10-13 17:42:50,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:50,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:50,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:50,654 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:50,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2019-10-13 17:42:50,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373527059] [2019-10-13 17:42:50,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-13 17:42:50,655 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-13 17:42:50,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 17:42:50,656 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 41 states. [2019-10-13 17:42:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:53,880 INFO L93 Difference]: Finished difference Result 212 states and 242 transitions. [2019-10-13 17:42:53,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:42:53,881 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2019-10-13 17:42:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:53,885 INFO L225 Difference]: With dead ends: 212 [2019-10-13 17:42:53,885 INFO L226 Difference]: Without dead ends: 206 [2019-10-13 17:42:53,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 50 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=255, Invalid=2607, Unknown=0, NotChecked=0, Total=2862 [2019-10-13 17:42:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-10-13 17:42:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 130. [2019-10-13 17:42:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-13 17:42:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2019-10-13 17:42:53,906 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2019-10-13 17:42:53,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:53,907 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2019-10-13 17:42:53,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-13 17:42:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2019-10-13 17:42:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:42:53,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:53,909 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:54,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:54,114 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:54,115 INFO L82 PathProgramCache]: Analyzing trace with hash -862553096, now seen corresponding path program 4 times [2019-10-13 17:42:54,115 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:54,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035454337] [2019-10-13 17:42:54,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:54,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:54,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:42:54,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035454337] [2019-10-13 17:42:54,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24787750] [2019-10-13 17:42:54,258 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:54,336 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:42:54,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:54,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:42:54,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:42:54,469 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:54,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:42:54,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119139062] [2019-10-13 17:42:54,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:42:54,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:54,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:42:54,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:54,471 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 14 states. [2019-10-13 17:42:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:55,211 INFO L93 Difference]: Finished difference Result 293 states and 339 transitions. [2019-10-13 17:42:55,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:42:55,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2019-10-13 17:42:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:55,216 INFO L225 Difference]: With dead ends: 293 [2019-10-13 17:42:55,216 INFO L226 Difference]: Without dead ends: 171 [2019-10-13 17:42:55,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:42:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-13 17:42:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 145. [2019-10-13 17:42:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-13 17:42:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2019-10-13 17:42:55,248 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 78 [2019-10-13 17:42:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:55,248 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2019-10-13 17:42:55,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:42:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2019-10-13 17:42:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 17:42:55,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:55,250 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:55,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:55,464 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:55,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:55,464 INFO L82 PathProgramCache]: Analyzing trace with hash -320389322, now seen corresponding path program 5 times [2019-10-13 17:42:55,465 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:55,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077450603] [2019-10-13 17:42:55,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:55,466 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:55,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 17:42:55,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077450603] [2019-10-13 17:42:55,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858448196] [2019-10-13 17:42:55,563 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:55,739 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 17:42:55,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:55,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:42:55,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 17:42:55,817 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:55,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:42:55,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807628860] [2019-10-13 17:42:55,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:42:55,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:42:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:55,818 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand 14 states. [2019-10-13 17:42:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:56,429 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2019-10-13 17:42:56,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:42:56,429 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2019-10-13 17:42:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:56,431 INFO L225 Difference]: With dead ends: 162 [2019-10-13 17:42:56,432 INFO L226 Difference]: Without dead ends: 109 [2019-10-13 17:42:56,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:42:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-13 17:42:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2019-10-13 17:42:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-13 17:42:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2019-10-13 17:42:56,447 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2019-10-13 17:42:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:56,447 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2019-10-13 17:42:56,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:42:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2019-10-13 17:42:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:42:56,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:56,449 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:56,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:56,653 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash -850657884, now seen corresponding path program 6 times [2019-10-13 17:42:56,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:56,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632838618] [2019-10-13 17:42:56,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:56,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:56,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:57,929 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2019-10-13 17:42:58,075 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2019-10-13 17:42:58,627 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-10-13 17:42:58,801 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-10-13 17:42:58,976 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2019-10-13 17:42:59,125 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-13 17:42:59,838 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-10-13 17:43:00,040 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-10-13 17:43:00,213 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-13 17:43:00,389 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-13 17:43:00,562 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2019-10-13 17:43:00,983 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2019-10-13 17:43:01,190 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-10-13 17:43:01,378 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-10-13 17:43:01,943 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-10-13 17:43:02,153 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-10-13 17:43:02,343 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2019-10-13 17:43:02,797 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-10-13 17:43:03,002 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2019-10-13 17:43:03,175 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2019-10-13 17:43:04,058 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2019-10-13 17:43:04,271 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2019-10-13 17:43:04,481 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2019-10-13 17:43:04,697 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2019-10-13 17:43:04,914 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2019-10-13 17:43:05,641 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2019-10-13 17:43:05,848 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2019-10-13 17:43:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:06,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632838618] [2019-10-13 17:43:06,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334304863] [2019-10-13 17:43:06,963 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:07,048 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 17:43:07,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:07,052 WARN L254 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 142 conjunts are in the unsatisfiable core [2019-10-13 17:43:07,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:07,156 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 [2019-10-13 17:43:07,157 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:07,165 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:07,166 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:07,166 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-13 17:43:07,278 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:07,279 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-10-13 17:43:07,280 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:07,289 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:07,289 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:07,290 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2019-10-13 17:43:12,539 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:12,540 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:12,540 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:12,541 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:12,542 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:12,543 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:12,563 INFO L341 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2019-10-13 17:43:12,563 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 30 [2019-10-13 17:43:12,564 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:12,572 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:12,572 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:12,573 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:70, output treesize:3 [2019-10-13 17:43:12,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:12,858 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:12,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 43] total 102 [2019-10-13 17:43:12,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806797548] [2019-10-13 17:43:12,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-10-13 17:43:12,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-10-13 17:43:12,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=9544, Unknown=0, NotChecked=0, Total=10302 [2019-10-13 17:43:12,863 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 102 states. [2019-10-13 17:43:14,950 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 49 [2019-10-13 17:43:16,127 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2019-10-13 17:43:17,629 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2019-10-13 17:43:20,727 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 36