java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:31,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:31,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:31,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:31,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:31,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:31,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:31,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:31,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:31,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:31,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:31,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:31,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:31,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:31,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:31,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:31,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:31,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:31,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:31,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:31,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:31,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:31,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:31,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:31,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:42:31,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:31,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:31,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:31,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:31,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:31,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:31,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:31,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:31,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:31,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:31,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:31,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:42:31,229 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:31,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:31,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:31,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:31,231 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:31,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:31,231 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:31,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:31,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:31,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:31,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:31,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:31,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:31,233 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:31,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:31,233 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:31,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:31,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:31,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:31,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:31,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:31,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:31,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:31,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:31,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:31,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:31,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:31,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:31,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:31,503 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:31,522 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:31,526 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:31,527 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:31,528 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:31,529 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-10-14 21:42:31,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba06e475/39a8c8800326441f8d115033079ff014/FLAG49908e971 [2019-10-14 21:42:32,078 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:32,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-10-14 21:42:32,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba06e475/39a8c8800326441f8d115033079ff014/FLAG49908e971 [2019-10-14 21:42:32,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba06e475/39a8c8800326441f8d115033079ff014 [2019-10-14 21:42:32,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:32,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:32,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:32,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:32,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:32,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a023e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32, skipping insertion in model container [2019-10-14 21:42:32,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,445 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:32,463 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:32,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:32,643 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:32,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:32,680 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:32,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32 WrapperNode [2019-10-14 21:42:32,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:32,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:32,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:32,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:32,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (1/1) ... [2019-10-14 21:42:32,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:32,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:32,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:32,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:32,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:32,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:32,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:32,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:32,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:33,093 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:33,093 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:42:33,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:33 BoogieIcfgContainer [2019-10-14 21:42:33,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:33,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:33,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:33,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:33,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:32" (1/3) ... [2019-10-14 21:42:33,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459008a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:33, skipping insertion in model container [2019-10-14 21:42:33,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:32" (2/3) ... [2019-10-14 21:42:33,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459008a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:33, skipping insertion in model container [2019-10-14 21:42:33,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:33" (3/3) ... [2019-10-14 21:42:33,105 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2019-10-14 21:42:33,132 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:33,154 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:33,169 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:33,197 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:33,197 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:33,197 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:33,198 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:33,198 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:33,198 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:33,198 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:33,198 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-14 21:42:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:42:33,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:33,225 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:33,227 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:33,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1998025284, now seen corresponding path program 1 times [2019-10-14 21:42:33,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:33,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491503636] [2019-10-14 21:42:33,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:33,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491503636] [2019-10-14 21:42:33,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:33,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:33,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374145731] [2019-10-14 21:42:33,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:33,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:33,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:33,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:33,446 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-14 21:42:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:33,602 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-10-14 21:42:33,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:33,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:42:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:33,616 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:42:33,617 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:42:33,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:42:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:42:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:42:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-10-14 21:42:33,679 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-10-14 21:42:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:33,680 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-10-14 21:42:33,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-10-14 21:42:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:42:33,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:33,684 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:33,684 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:33,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:33,686 INFO L82 PathProgramCache]: Analyzing trace with hash -915838997, now seen corresponding path program 1 times [2019-10-14 21:42:33,686 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:33,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587649875] [2019-10-14 21:42:33,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:33,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587649875] [2019-10-14 21:42:33,772 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:33,772 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:33,772 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355706840] [2019-10-14 21:42:33,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:33,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:33,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:33,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:33,775 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-10-14 21:42:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:33,854 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-10-14 21:42:33,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:33,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:42:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:33,856 INFO L225 Difference]: With dead ends: 40 [2019-10-14 21:42:33,856 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:42:33,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:42:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 21:42:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:42:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-14 21:42:33,865 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-10-14 21:42:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:33,866 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-14 21:42:33,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-14 21:42:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:42:33,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:33,867 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:33,868 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash 203688137, now seen corresponding path program 1 times [2019-10-14 21:42:33,869 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:33,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436564442] [2019-10-14 21:42:33,869 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,869 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:33,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436564442] [2019-10-14 21:42:33,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:33,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:33,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847475141] [2019-10-14 21:42:33,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:33,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:33,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:33,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:33,973 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-10-14 21:42:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:34,035 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-14 21:42:34,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:34,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:42:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:34,037 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:42:34,037 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:42:34,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:42:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-14 21:42:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:42:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 21:42:34,043 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-10-14 21:42:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:34,044 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 21:42:34,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:34,044 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 21:42:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:34,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:34,045 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] [2019-10-14 21:42:34,046 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:34,046 INFO L82 PathProgramCache]: Analyzing trace with hash -990062782, now seen corresponding path program 1 times [2019-10-14 21:42:34,046 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:34,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630633870] [2019-10-14 21:42:34,047 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,047 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:34,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630633870] [2019-10-14 21:42:34,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310383721] [2019-10-14 21:42:34,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:34,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:34,239 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:34,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:42:34,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236292639] [2019-10-14 21:42:34,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:34,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:34,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:34,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:34,242 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-14 21:42:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:34,358 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-10-14 21:42:34,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:42:34,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:42:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:34,361 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:42:34,361 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:42:34,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:42:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-10-14 21:42:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:42:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 21:42:34,376 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-14 21:42:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:34,376 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 21:42:34,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 21:42:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:42:34,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:34,381 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] [2019-10-14 21:42:34,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:34,582 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:34,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1464200924, now seen corresponding path program 2 times [2019-10-14 21:42:34,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:34,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266518248] [2019-10-14 21:42:34,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:34,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266518248] [2019-10-14 21:42:34,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866690811] [2019-10-14 21:42:34,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:34,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:42:34,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:34,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:34,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:34,813 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 21:42:34,814 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:34,820 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:34,820 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 21:42:34,820 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:42:34,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:34,869 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:34,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-10-14 21:42:34,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002986437] [2019-10-14 21:42:34,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:34,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:34,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:34,872 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 8 states. [2019-10-14 21:42:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:35,009 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-10-14 21:42:35,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:35,010 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-10-14 21:42:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:35,013 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:42:35,013 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:42:35,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:42:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2019-10-14 21:42:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:42:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-10-14 21:42:35,042 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2019-10-14 21:42:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:35,042 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-10-14 21:42:35,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-10-14 21:42:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:42:35,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:35,044 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] [2019-10-14 21:42:35,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:35,248 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:35,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2144259294, now seen corresponding path program 1 times [2019-10-14 21:42:35,249 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:35,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503511179] [2019-10-14 21:42:35,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:35,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503511179] [2019-10-14 21:42:35,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913301445] [2019-10-14 21:42:35,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:35,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:35,367 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:35,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:42:35,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189338687] [2019-10-14 21:42:35,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:42:35,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:35,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:42:35,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:35,369 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2019-10-14 21:42:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:35,477 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2019-10-14 21:42:35,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:35,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-10-14 21:42:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:35,481 INFO L225 Difference]: With dead ends: 75 [2019-10-14 21:42:35,481 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:42:35,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:42:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2019-10-14 21:42:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:42:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-14 21:42:35,505 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2019-10-14 21:42:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:35,505 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-14 21:42:35,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:42:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-14 21:42:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:42:35,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:35,508 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:35,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:35,718 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:35,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1680863843, now seen corresponding path program 1 times [2019-10-14 21:42:35,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:35,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686769677] [2019-10-14 21:42:35,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:35,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686769677] [2019-10-14 21:42:35,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764192136] [2019-10-14 21:42:35,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:35,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:35,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:35,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:42:35,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532200525] [2019-10-14 21:42:35,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:35,862 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:35,862 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2019-10-14 21:42:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:35,960 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2019-10-14 21:42:35,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:42:35,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-10-14 21:42:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:35,962 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:42:35,963 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:42:35,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:42:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2019-10-14 21:42:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:42:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2019-10-14 21:42:35,972 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2019-10-14 21:42:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:35,972 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2019-10-14 21:42:35,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2019-10-14 21:42:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:42:35,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:35,974 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:36,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:36,178 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash 927761286, now seen corresponding path program 2 times [2019-10-14 21:42:36,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:36,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505561884] [2019-10-14 21:42:36,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:36,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:36,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:42:36,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505561884] [2019-10-14 21:42:36,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401455896] [2019-10-14 21:42:36,331 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:36,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:36,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:36,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:36,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:42:36,428 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:36,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:42:36,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030015553] [2019-10-14 21:42:36,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:42:36,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:42:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:36,430 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 9 states. [2019-10-14 21:42:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:36,546 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2019-10-14 21:42:36,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:36,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-10-14 21:42:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:36,547 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:42:36,547 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:42:36,548 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:42:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2019-10-14 21:42:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:42:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2019-10-14 21:42:36,556 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 32 [2019-10-14 21:42:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:36,557 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2019-10-14 21:42:36,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:42:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2019-10-14 21:42:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:42:36,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:36,558 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:36,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:36,766 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash 793377279, now seen corresponding path program 3 times [2019-10-14 21:42:36,766 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:36,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421311332] [2019-10-14 21:42:36,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:36,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:36,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:42:36,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421311332] [2019-10-14 21:42:36,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944317372] [2019-10-14 21:42:36,883 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:36,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:42:36,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:36,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:36,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:37,069 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:37,069 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 32 treesize of output 22 [2019-10-14 21:42:37,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:37,072 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:37,081 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:37,082 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 21:42:37,082 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:42:37,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:42:37,132 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:37,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2019-10-14 21:42:37,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466422839] [2019-10-14 21:42:37,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:42:37,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:37,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:42:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:37,134 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 10 states. [2019-10-14 21:42:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:37,376 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2019-10-14 21:42:37,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:42:37,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-10-14 21:42:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:37,378 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:42:37,378 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:42:37,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:42:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2019-10-14 21:42:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:42:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2019-10-14 21:42:37,400 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2019-10-14 21:42:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:37,403 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2019-10-14 21:42:37,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:42:37,404 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2019-10-14 21:42:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:42:37,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:37,405 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:37,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:37,612 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash -587199816, now seen corresponding path program 1 times [2019-10-14 21:42:37,613 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:37,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507048463] [2019-10-14 21:42:37,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:37,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:37,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:42:37,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507048463] [2019-10-14 21:42:37,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233586121] [2019-10-14 21:42:37,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:37,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:37,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:42:37,818 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:37,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:42:37,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132315750] [2019-10-14 21:42:37,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:42:37,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:37,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:42:37,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:37,820 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 10 states. [2019-10-14 21:42:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:37,915 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2019-10-14 21:42:37,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:42:37,916 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-10-14 21:42:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:37,917 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:42:37,917 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:42:37,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:42:37,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-10-14 21:42:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:42:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-10-14 21:42:37,927 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 45 [2019-10-14 21:42:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:37,927 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-10-14 21:42:37,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:42:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-10-14 21:42:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:42:37,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:37,929 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:38,134 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,135 INFO L82 PathProgramCache]: Analyzing trace with hash -924407389, now seen corresponding path program 2 times [2019-10-14 21:42:38,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20204250] [2019-10-14 21:42:38,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:42:38,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20204250] [2019-10-14 21:42:38,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068217085] [2019-10-14 21:42:38,240 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:38,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:38,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:38,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:38,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:42:38,322 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:38,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:42:38,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154973182] [2019-10-14 21:42:38,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:42:38,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:42:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:38,324 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 11 states. [2019-10-14 21:42:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:38,533 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2019-10-14 21:42:38,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:42:38,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2019-10-14 21:42:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:38,535 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:42:38,535 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:42:38,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:42:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-10-14 21:42:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:42:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-10-14 21:42:38,545 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 50 [2019-10-14 21:42:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:38,545 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-10-14 21:42:38,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:42:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-10-14 21:42:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:42:38,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:38,547 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:38,759 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,760 INFO L82 PathProgramCache]: Analyzing trace with hash -881740204, now seen corresponding path program 3 times [2019-10-14 21:42:38,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175605864] [2019-10-14 21:42:38,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:42:38,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175605864] [2019-10-14 21:42:38,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13560884] [2019-10-14 21:42:38,869 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:38,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:42:38,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:38,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:42:38,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:39,092 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 21:42:39,092 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:39,094 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:39,094 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 21:42:39,095 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:42:39,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 21:42:39,154 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:39,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-10-14 21:42:39,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690999762] [2019-10-14 21:42:39,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:42:39,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:42:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:39,156 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 22 states. [2019-10-14 21:42:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,058 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2019-10-14 21:42:40,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:42:40,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2019-10-14 21:42:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,060 INFO L225 Difference]: With dead ends: 139 [2019-10-14 21:42:40,060 INFO L226 Difference]: Without dead ends: 102 [2019-10-14 21:42:40,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=1645, Unknown=0, NotChecked=0, Total=1980 [2019-10-14 21:42:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-14 21:42:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2019-10-14 21:42:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:42:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2019-10-14 21:42:40,074 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 55 [2019-10-14 21:42:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,074 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2019-10-14 21:42:40,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:42:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2019-10-14 21:42:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:42:40,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,077 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,289 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1530684923, now seen corresponding path program 1 times [2019-10-14 21:42:40,289 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,289 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068836623] [2019-10-14 21:42:40,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:42:40,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068836623] [2019-10-14 21:42:40,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994544022] [2019-10-14 21:42:40,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 21:42:40,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:40,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:42:40,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852220652] [2019-10-14 21:42:40,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:40,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:40,500 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 13 states. [2019-10-14 21:42:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,688 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2019-10-14 21:42:40,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:40,688 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2019-10-14 21:42:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,690 INFO L225 Difference]: With dead ends: 172 [2019-10-14 21:42:40,690 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 21:42:40,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 21:42:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2019-10-14 21:42:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 21:42:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2019-10-14 21:42:40,715 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 60 [2019-10-14 21:42:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,715 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2019-10-14 21:42:40,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2019-10-14 21:42:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:42:40,719 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,720 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,932 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,932 INFO L82 PathProgramCache]: Analyzing trace with hash 486565358, now seen corresponding path program 2 times [2019-10-14 21:42:40,932 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141277018] [2019-10-14 21:42:40,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 21:42:41,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141277018] [2019-10-14 21:42:41,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532612277] [2019-10-14 21:42:41,064 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:41,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:41,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:41,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 21:42:41,145 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:41,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:42:41,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162911354] [2019-10-14 21:42:41,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:41,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:41,147 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 14 states. [2019-10-14 21:42:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,333 INFO L93 Difference]: Finished difference Result 186 states and 228 transitions. [2019-10-14 21:42:41,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:41,334 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2019-10-14 21:42:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,335 INFO L225 Difference]: With dead ends: 186 [2019-10-14 21:42:41,335 INFO L226 Difference]: Without dead ends: 112 [2019-10-14 21:42:41,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-14 21:42:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2019-10-14 21:42:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:42:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2019-10-14 21:42:41,346 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 65 [2019-10-14 21:42:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,346 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2019-10-14 21:42:41,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2019-10-14 21:42:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 21:42:41,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,348 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,552 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1479059049, now seen corresponding path program 3 times [2019-10-14 21:42:41,553 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617341396] [2019-10-14 21:42:41,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-14 21:42:41,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617341396] [2019-10-14 21:42:41,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381249097] [2019-10-14 21:42:41,689 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:42:41,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:41,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:42:41,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,060 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:42,061 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 32 treesize of output 22 [2019-10-14 21:42:42,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:42,063 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,068 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:42,069 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 21:42:42,069 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:42:42,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-14 21:42:42,141 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:42,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-10-14 21:42:42,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950354766] [2019-10-14 21:42:42,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:42:42,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:42:42,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:42:42,143 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand 28 states. [2019-10-14 21:42:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,022 INFO L93 Difference]: Finished difference Result 224 states and 270 transitions. [2019-10-14 21:42:45,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-14 21:42:45,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2019-10-14 21:42:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,025 INFO L225 Difference]: With dead ends: 224 [2019-10-14 21:42:45,025 INFO L226 Difference]: Without dead ends: 144 [2019-10-14 21:42:45,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1260, Invalid=5382, Unknown=0, NotChecked=0, Total=6642 [2019-10-14 21:42:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-10-14 21:42:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 86. [2019-10-14 21:42:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:42:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2019-10-14 21:42:45,037 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 70 [2019-10-14 21:42:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,037 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2019-10-14 21:42:45,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:42:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2019-10-14 21:42:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:42:45,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,039 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,243 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1699579203, now seen corresponding path program 4 times [2019-10-14 21:42:45,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64987731] [2019-10-14 21:42:45,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-10-14 21:42:45,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64987731] [2019-10-14 21:42:45,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070750613] [2019-10-14 21:42:45,410 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:45,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:45,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-10-14 21:42:45,505 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:42:45,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129906215] [2019-10-14 21:42:45,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:42:45,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:42:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:45,507 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 16 states. [2019-10-14 21:42:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,665 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2019-10-14 21:42:45,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:42:45,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2019-10-14 21:42:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,668 INFO L225 Difference]: With dead ends: 151 [2019-10-14 21:42:45,668 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 21:42:45,669 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 21:42:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2019-10-14 21:42:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:42:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2019-10-14 21:42:45,677 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 83 [2019-10-14 21:42:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,678 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2019-10-14 21:42:45,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:42:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2019-10-14 21:42:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 21:42:45,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,679 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,883 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1566010490, now seen corresponding path program 5 times [2019-10-14 21:42:45,884 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611935915] [2019-10-14 21:42:45,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 21:42:46,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611935915] [2019-10-14 21:42:46,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034913396] [2019-10-14 21:42:46,046 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,212 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 21:42:46,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-14 21:42:46,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2019-10-14 21:42:46,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899495837] [2019-10-14 21:42:46,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:42:46,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:42:46,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:46,230 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 16 states. [2019-10-14 21:42:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,390 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2019-10-14 21:42:46,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:42:46,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-10-14 21:42:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,392 INFO L225 Difference]: With dead ends: 159 [2019-10-14 21:42:46,392 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 21:42:46,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 21:42:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2019-10-14 21:42:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-14 21:42:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2019-10-14 21:42:46,401 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 88 [2019-10-14 21:42:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,401 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2019-10-14 21:42:46,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:42:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2019-10-14 21:42:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 21:42:46,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,402 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:46,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,606 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash 32199903, now seen corresponding path program 6 times [2019-10-14 21:42:46,607 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:46,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314264430] [2019-10-14 21:42:46,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-14 21:42:46,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314264430] [2019-10-14 21:42:46,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441120314] [2019-10-14 21:42:46,792 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 21:42:46,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:47,119 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 21:42:47,120 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:47,122 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:47,122 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 21:42:47,123 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:42:47,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-14 21:42:47,185 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:47,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2019-10-14 21:42:47,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072806730] [2019-10-14 21:42:47,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:42:47,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:47,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:42:47,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:42:47,186 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 30 states. [2019-10-14 21:42:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:48,625 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2019-10-14 21:42:48,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-14 21:42:48,626 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2019-10-14 21:42:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:48,628 INFO L225 Difference]: With dead ends: 222 [2019-10-14 21:42:48,628 INFO L226 Difference]: Without dead ends: 159 [2019-10-14 21:42:48,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=3287, Unknown=0, NotChecked=0, Total=4032 [2019-10-14 21:42:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-14 21:42:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2019-10-14 21:42:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-10-14 21:42:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 176 transitions. [2019-10-14 21:42:48,643 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 176 transitions. Word has length 93 [2019-10-14 21:42:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:48,644 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 176 transitions. [2019-10-14 21:42:48,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:42:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 176 transitions. [2019-10-14 21:42:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:42:48,646 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:48,646 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:48,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,851 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash 499376616, now seen corresponding path program 4 times [2019-10-14 21:42:48,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:48,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932189342] [2019-10-14 21:42:48,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-10-14 21:42:49,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932189342] [2019-10-14 21:42:49,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085564859] [2019-10-14 21:42:49,041 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,127 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:49,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:49,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:42:49,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-10-14 21:42:49,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:49,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:42:49,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961406937] [2019-10-14 21:42:49,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:49,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:49,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:49,148 INFO L87 Difference]: Start difference. First operand 148 states and 176 transitions. Second operand 19 states. [2019-10-14 21:42:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,367 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2019-10-14 21:42:49,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:49,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2019-10-14 21:42:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,369 INFO L225 Difference]: With dead ends: 274 [2019-10-14 21:42:49,369 INFO L226 Difference]: Without dead ends: 161 [2019-10-14 21:42:49,370 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-10-14 21:42:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2019-10-14 21:42:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-14 21:42:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 186 transitions. [2019-10-14 21:42:49,382 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 186 transitions. Word has length 98 [2019-10-14 21:42:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,382 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 186 transitions. [2019-10-14 21:42:49,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 186 transitions. [2019-10-14 21:42:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 21:42:49,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,384 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:49,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,588 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1961194887, now seen corresponding path program 5 times [2019-10-14 21:42:49,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:49,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551830034] [2019-10-14 21:42:49,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2019-10-14 21:42:49,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551830034] [2019-10-14 21:42:49,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311526218] [2019-10-14 21:42:49,824 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,043 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-14 21:42:50,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:50,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:42:50,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-14 21:42:50,067 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:50,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 21:42:50,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736796510] [2019-10-14 21:42:50,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:42:50,069 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:50,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:42:50,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:50,070 INFO L87 Difference]: Start difference. First operand 156 states and 186 transitions. Second operand 20 states. [2019-10-14 21:42:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:50,251 INFO L93 Difference]: Finished difference Result 288 states and 354 transitions. [2019-10-14 21:42:50,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:42:50,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2019-10-14 21:42:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:50,253 INFO L225 Difference]: With dead ends: 288 [2019-10-14 21:42:50,253 INFO L226 Difference]: Without dead ends: 169 [2019-10-14 21:42:50,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-10-14 21:42:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2019-10-14 21:42:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-10-14 21:42:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2019-10-14 21:42:50,267 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 103 [2019-10-14 21:42:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:50,267 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2019-10-14 21:42:50,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:42:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2019-10-14 21:42:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 21:42:50,269 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:50,269 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:50,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,474 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:50,475 INFO L82 PathProgramCache]: Analyzing trace with hash -644683188, now seen corresponding path program 6 times [2019-10-14 21:42:50,475 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:50,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973841517] [2019-10-14 21:42:50,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-14 21:42:50,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973841517] [2019-10-14 21:42:50,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677102431] [2019-10-14 21:42:50,692 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,801 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 21:42:50,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:50,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:42:50,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:51,294 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:51,295 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 32 treesize of output 22 [2019-10-14 21:42:51,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:51,296 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:51,301 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:51,302 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 21:42:51,302 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:42:51,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2019-10-14 21:42:51,421 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:51,421 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2019-10-14 21:42:51,421 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167100779] [2019-10-14 21:42:51,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:42:51,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:51,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:42:51,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:42:51,423 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 36 states. [2019-10-14 21:42:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:55,149 INFO L93 Difference]: Finished difference Result 330 states and 399 transitions. [2019-10-14 21:42:55,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-10-14 21:42:55,149 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 108 [2019-10-14 21:42:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:55,150 INFO L225 Difference]: With dead ends: 330 [2019-10-14 21:42:55,151 INFO L226 Difference]: Without dead ends: 205 [2019-10-14 21:42:55,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4233 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2653, Invalid=10457, Unknown=0, NotChecked=0, Total=13110 [2019-10-14 21:42:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-10-14 21:42:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 124. [2019-10-14 21:42:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-14 21:42:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2019-10-14 21:42:55,165 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 108 [2019-10-14 21:42:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:55,165 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2019-10-14 21:42:55,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:42:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2019-10-14 21:42:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:42:55,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:55,167 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:55,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,371 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash -712675122, now seen corresponding path program 7 times [2019-10-14 21:42:55,372 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:55,372 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925880175] [2019-10-14 21:42:55,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:55,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:55,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 6 proven. 289 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-10-14 21:42:55,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925880175] [2019-10-14 21:42:55,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764019387] [2019-10-14 21:42:55,594 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:42:55,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2019-10-14 21:42:55,714 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:55,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:42:55,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294985394] [2019-10-14 21:42:55,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:42:55,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:42:55,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:55,716 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand 22 states. [2019-10-14 21:42:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:55,961 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2019-10-14 21:42:55,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:55,964 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2019-10-14 21:42:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:55,965 INFO L225 Difference]: With dead ends: 215 [2019-10-14 21:42:55,965 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 21:42:55,966 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 21:42:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2019-10-14 21:42:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-14 21:42:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2019-10-14 21:42:55,976 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 121 [2019-10-14 21:42:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:55,976 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2019-10-14 21:42:55,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:42:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2019-10-14 21:42:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:42:55,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:55,978 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:56,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:56,181 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -110502295, now seen corresponding path program 8 times [2019-10-14 21:42:56,183 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:56,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067617119] [2019-10-14 21:42:56,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 6 proven. 324 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2019-10-14 21:42:56,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067617119] [2019-10-14 21:42:56,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668526764] [2019-10-14 21:42:56,436 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:56,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:56,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:56,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:42:56,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2019-10-14 21:42:56,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:56,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 21:42:56,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889530405] [2019-10-14 21:42:56,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:42:56,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:56,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:42:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:56,561 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 23 states. [2019-10-14 21:42:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:56,807 INFO L93 Difference]: Finished difference Result 223 states and 264 transitions. [2019-10-14 21:42:56,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:42:56,808 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 126 [2019-10-14 21:42:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:56,809 INFO L225 Difference]: With dead ends: 223 [2019-10-14 21:42:56,810 INFO L226 Difference]: Without dead ends: 137 [2019-10-14 21:42:56,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-14 21:42:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2019-10-14 21:42:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-14 21:42:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2019-10-14 21:42:56,819 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 126 [2019-10-14 21:42:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:56,820 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2019-10-14 21:42:56,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:42:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2019-10-14 21:42:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 21:42:56,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:56,821 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:57,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:57,025 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1997593494, now seen corresponding path program 9 times [2019-10-14 21:42:57,026 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:57,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213723867] [2019-10-14 21:42:57,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:57,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:57,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 6 proven. 361 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-10-14 21:42:57,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213723867] [2019-10-14 21:42:57,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762769833] [2019-10-14 21:42:57,284 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:57,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:42:57,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:57,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:42:57,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:57,634 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 21:42:57,635 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:57,636 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:57,636 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 21:42:57,636 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:42:57,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 11 proven. 151 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2019-10-14 21:42:57,733 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:57,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 38 [2019-10-14 21:42:57,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117173500] [2019-10-14 21:42:57,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:42:57,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:57,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:42:57,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:42:57,734 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand 38 states. [2019-10-14 21:42:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:59,628 INFO L93 Difference]: Finished difference Result 305 states and 371 transitions. [2019-10-14 21:42:59,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-14 21:42:59,628 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 131 [2019-10-14 21:42:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:59,629 INFO L225 Difference]: With dead ends: 305 [2019-10-14 21:42:59,630 INFO L226 Difference]: Without dead ends: 216 [2019-10-14 21:42:59,632 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1337, Invalid=5469, Unknown=0, NotChecked=0, Total=6806 [2019-10-14 21:42:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-14 21:42:59,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 205. [2019-10-14 21:42:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-10-14 21:42:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 245 transitions. [2019-10-14 21:42:59,648 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 245 transitions. Word has length 131 [2019-10-14 21:42:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:59,648 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 245 transitions. [2019-10-14 21:42:59,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:42:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 245 transitions. [2019-10-14 21:42:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 21:42:59,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:59,650 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 18, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:59,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:59,854 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash 459393739, now seen corresponding path program 7 times [2019-10-14 21:42:59,855 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:59,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500193662] [2019-10-14 21:42:59,856 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,856 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 6 proven. 400 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2019-10-14 21:43:00,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500193662] [2019-10-14 21:43:00,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507168962] [2019-10-14 21:43:00,185 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:43:00,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2019-10-14 21:43:00,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:00,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:43:00,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053594278] [2019-10-14 21:43:00,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:43:00,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:00,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:43:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:43:00,317 INFO L87 Difference]: Start difference. First operand 205 states and 245 transitions. Second operand 25 states. [2019-10-14 21:43:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:00,534 INFO L93 Difference]: Finished difference Result 376 states and 462 transitions. [2019-10-14 21:43:00,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:43:00,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2019-10-14 21:43:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:00,537 INFO L225 Difference]: With dead ends: 376 [2019-10-14 21:43:00,537 INFO L226 Difference]: Without dead ends: 218 [2019-10-14 21:43:00,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:43:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-10-14 21:43:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2019-10-14 21:43:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-10-14 21:43:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 255 transitions. [2019-10-14 21:43:00,554 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 255 transitions. Word has length 136 [2019-10-14 21:43:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:00,554 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 255 transitions. [2019-10-14 21:43:00,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:43:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 255 transitions. [2019-10-14 21:43:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 21:43:00,555 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:00,556 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 19, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:00,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:00,760 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1675845628, now seen corresponding path program 8 times [2019-10-14 21:43:00,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:00,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131850324] [2019-10-14 21:43:00,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:00,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:00,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 6 proven. 441 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2019-10-14 21:43:01,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131850324] [2019-10-14 21:43:01,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305293357] [2019-10-14 21:43:01,160 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:01,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:01,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:01,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:43:01,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2019-10-14 21:43:01,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:01,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 21:43:01,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184315215] [2019-10-14 21:43:01,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:43:01,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:43:01,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:43:01,307 INFO L87 Difference]: Start difference. First operand 213 states and 255 transitions. Second operand 26 states. [2019-10-14 21:43:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:01,613 INFO L93 Difference]: Finished difference Result 390 states and 480 transitions. [2019-10-14 21:43:01,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:43:01,614 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 141 [2019-10-14 21:43:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:01,616 INFO L225 Difference]: With dead ends: 390 [2019-10-14 21:43:01,617 INFO L226 Difference]: Without dead ends: 226 [2019-10-14 21:43:01,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:43:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-10-14 21:43:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2019-10-14 21:43:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-10-14 21:43:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 265 transitions. [2019-10-14 21:43:01,633 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 265 transitions. Word has length 141 [2019-10-14 21:43:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:01,634 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 265 transitions. [2019-10-14 21:43:01,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:43:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 265 transitions. [2019-10-14 21:43:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 21:43:01,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:01,635 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 20, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:01,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:01,839 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:01,839 INFO L82 PathProgramCache]: Analyzing trace with hash 528158511, now seen corresponding path program 9 times [2019-10-14 21:43:01,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:01,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889525462] [2019-10-14 21:43:01,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:01,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:01,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 6 proven. 484 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2019-10-14 21:43:02,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889525462] [2019-10-14 21:43:02,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771370082] [2019-10-14 21:43:02,228 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:02,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:43:02,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:02,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 21:43:02,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:03,060 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:43:03,061 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 32 treesize of output 22 [2019-10-14 21:43:03,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:43:03,062 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:43:03,065 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:43:03,066 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 21:43:03,066 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:43:03,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:43:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 59 proven. 180 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2019-10-14 21:43:03,181 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:03,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 44 [2019-10-14 21:43:03,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644211656] [2019-10-14 21:43:03,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-14 21:43:03,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:03,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-14 21:43:03,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 21:43:03,183 INFO L87 Difference]: Start difference. First operand 221 states and 265 transitions. Second operand 44 states. [2019-10-14 21:43:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:08,318 INFO L93 Difference]: Finished difference Result 436 states and 528 transitions. [2019-10-14 21:43:08,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2019-10-14 21:43:08,318 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 146 [2019-10-14 21:43:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:08,320 INFO L225 Difference]: With dead ends: 436 [2019-10-14 21:43:08,320 INFO L226 Difference]: Without dead ends: 266 [2019-10-14 21:43:08,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7426 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4578, Invalid=17178, Unknown=0, NotChecked=0, Total=21756 [2019-10-14 21:43:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-10-14 21:43:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 162. [2019-10-14 21:43:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-10-14 21:43:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2019-10-14 21:43:08,339 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 146 [2019-10-14 21:43:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:08,339 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2019-10-14 21:43:08,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-14 21:43:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2019-10-14 21:43:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-14 21:43:08,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:08,341 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:08,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:08,544 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:08,545 INFO L82 PathProgramCache]: Analyzing trace with hash -45740711, now seen corresponding path program 10 times [2019-10-14 21:43:08,545 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:08,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398445853] [2019-10-14 21:43:08,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:08,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:08,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1308 backedges. 8 proven. 529 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2019-10-14 21:43:08,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398445853] [2019-10-14 21:43:08,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677279760] [2019-10-14 21:43:08,946 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:09,056 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:09,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:09,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:43:09,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1308 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2019-10-14 21:43:09,108 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:09,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:43:09,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535370042] [2019-10-14 21:43:09,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:43:09,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:09,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:43:09,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:43:09,110 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand 28 states. [2019-10-14 21:43:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:09,419 INFO L93 Difference]: Finished difference Result 279 states and 330 transitions. [2019-10-14 21:43:09,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:43:09,421 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2019-10-14 21:43:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:09,422 INFO L225 Difference]: With dead ends: 279 [2019-10-14 21:43:09,423 INFO L226 Difference]: Without dead ends: 170 [2019-10-14 21:43:09,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:43:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-14 21:43:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2019-10-14 21:43:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-10-14 21:43:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2019-10-14 21:43:09,435 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 159 [2019-10-14 21:43:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:09,436 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2019-10-14 21:43:09,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:43:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2019-10-14 21:43:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-14 21:43:09,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:09,437 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:09,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:09,641 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash 52054604, now seen corresponding path program 11 times [2019-10-14 21:43:09,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:09,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307475910] [2019-10-14 21:43:09,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:09,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:09,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 8 proven. 576 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2019-10-14 21:43:10,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307475910] [2019-10-14 21:43:10,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37667621] [2019-10-14 21:43:10,079 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:11,072 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-10-14 21:43:11,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:11,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 21:43:11,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2019-10-14 21:43:11,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:11,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-14 21:43:11,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751640650] [2019-10-14 21:43:11,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:43:11,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:43:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:43:11,154 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand 29 states. [2019-10-14 21:43:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:11,553 INFO L93 Difference]: Finished difference Result 287 states and 340 transitions. [2019-10-14 21:43:11,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:43:11,554 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 164 [2019-10-14 21:43:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:11,556 INFO L225 Difference]: With dead ends: 287 [2019-10-14 21:43:11,556 INFO L226 Difference]: Without dead ends: 175 [2019-10-14 21:43:11,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:43:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-14 21:43:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2019-10-14 21:43:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-10-14 21:43:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 198 transitions. [2019-10-14 21:43:11,579 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 198 transitions. Word has length 164 [2019-10-14 21:43:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:11,580 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 198 transitions. [2019-10-14 21:43:11,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:43:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 198 transitions. [2019-10-14 21:43:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-14 21:43:11,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:11,582 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:11,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:11,790 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 173761781, now seen corresponding path program 12 times [2019-10-14 21:43:11,793 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:11,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706545968] [2019-10-14 21:43:11,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:11,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:11,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 8 proven. 625 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2019-10-14 21:43:12,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706545968] [2019-10-14 21:43:12,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453819265] [2019-10-14 21:43:12,188 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:12,958 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-10-14 21:43:12,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:12,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:43:12,964 INFO L279 TraceCheckSpWp]: Computing forward predicates...