java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:14:26,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:14:26,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:14:26,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:14:26,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:14:26,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:14:26,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:14:26,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:14:26,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:14:26,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:14:26,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:14:26,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:14:26,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:14:26,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:14:26,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:14:26,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:14:26,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:14:26,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:14:26,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:14:26,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:14:26,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:14:26,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:14:26,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:14:26,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:14:26,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:14:26,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:14:26,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:14:26,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:14:26,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:14:26,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:14:26,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:14:26,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:14:26,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:14:26,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:14:26,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:14:26,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:14:26,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:14:26,249 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:14:26,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:14:26,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:14:26,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:14:26,252 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:14:26,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:14:26,252 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:14:26,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:14:26,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:14:26,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:14:26,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:14:26,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:14:26,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:14:26,255 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:14:26,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:14:26,255 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:14:26,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:14:26,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:14:26,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:14:26,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:14:26,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:14:26,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:14:26,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:14:26,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:14:26,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:14:26,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:14:26,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:14:26,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:14:26,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:14:26,576 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:14:26,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:14:26,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:14:26,595 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:14:26,595 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:14:26,596 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-10-14 23:14:26,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68cb3e0bf/7922b12df2e64129b8a6864eeb4d297c/FLAG878017acb [2019-10-14 23:14:27,085 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:14:27,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-10-14 23:14:27,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68cb3e0bf/7922b12df2e64129b8a6864eeb4d297c/FLAG878017acb [2019-10-14 23:14:27,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68cb3e0bf/7922b12df2e64129b8a6864eeb4d297c [2019-10-14 23:14:27,443 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:14:27,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:14:27,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:27,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:14:27,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:14:27,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc525ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27, skipping insertion in model container [2019-10-14 23:14:27,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,461 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:14:27,482 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:14:27,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:27,695 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:14:27,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:27,824 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:14:27,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27 WrapperNode [2019-10-14 23:14:27,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:27,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:14:27,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:14:27,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:14:27,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (1/1) ... [2019-10-14 23:14:27,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:14:27,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:14:27,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:14:27,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:14:27,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:14:27,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:14:27,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:14:27,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:14:27,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:14:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:14:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:14:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:14:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:14:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:14:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:14:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:14:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:14:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:14:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:14:28,152 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:14:28,152 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:14:28,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:28 BoogieIcfgContainer [2019-10-14 23:14:28,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:14:28,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:14:28,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:14:28,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:14:28,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:14:27" (1/3) ... [2019-10-14 23:14:28,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f45e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:28, skipping insertion in model container [2019-10-14 23:14:28,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:27" (2/3) ... [2019-10-14 23:14:28,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f45e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:28, skipping insertion in model container [2019-10-14 23:14:28,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:28" (3/3) ... [2019-10-14 23:14:28,189 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2019-10-14 23:14:28,210 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:14:28,228 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:14:28,249 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:14:28,284 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:14:28,284 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:14:28,284 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:14:28,284 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:14:28,284 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:14:28,285 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:14:28,285 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:14:28,285 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:14:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 23:14:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:14:28,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:28,306 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:28,309 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1378298279, now seen corresponding path program 1 times [2019-10-14 23:14:28,322 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:28,323 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109115073] [2019-10-14 23:14:28,323 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,323 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:28,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109115073] [2019-10-14 23:14:28,476 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:28,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:14:28,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976611614] [2019-10-14 23:14:28,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:14:28,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:14:28,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:14:28,500 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-14 23:14:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:28,611 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-10-14 23:14:28,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:14:28,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 23:14:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:28,622 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:14:28,622 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 23:14:28,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:14:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 23:14:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 23:14:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:14:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-14 23:14:28,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-10-14 23:14:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:28,664 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-14 23:14:28,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:14:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-14 23:14:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:14:28,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:28,666 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:28,667 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:28,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1297975765, now seen corresponding path program 1 times [2019-10-14 23:14:28,668 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:28,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191262550] [2019-10-14 23:14:28,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:28,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191262550] [2019-10-14 23:14:28,825 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:28,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:14:28,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275509938] [2019-10-14 23:14:28,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:14:28,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:28,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:14:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:14:28,829 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-10-14 23:14:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:28,998 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-10-14 23:14:28,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:14:28,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-14 23:14:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:29,000 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:14:29,000 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:14:29,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:14:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 23:14:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:14:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 23:14:29,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-14 23:14:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:29,011 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 23:14:29,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:14:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 23:14:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:14:29,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:29,012 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:29,013 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1296128723, now seen corresponding path program 1 times [2019-10-14 23:14:29,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:29,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955683232] [2019-10-14 23:14:29,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:29,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:29,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:29,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955683232] [2019-10-14 23:14:29,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:29,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:14:29,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101542189] [2019-10-14 23:14:29,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:14:29,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:29,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:14:29,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:29,083 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2019-10-14 23:14:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:29,193 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2019-10-14 23:14:29,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:14:29,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 23:14:29,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:29,200 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:14:29,201 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:14:29,202 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 23:14:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:14:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-10-14 23:14:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:14:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-14 23:14:29,226 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2019-10-14 23:14:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:29,227 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-14 23:14:29,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:14:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-14 23:14:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:14:29,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:29,229 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:29,229 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1388961987, now seen corresponding path program 1 times [2019-10-14 23:14:29,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:29,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655506211] [2019-10-14 23:14:29,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:29,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:29,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:29,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655506211] [2019-10-14 23:14:29,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019677634] [2019-10-14 23:14:29,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:29,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:14:29,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:29,518 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:14:29,519 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:14:29,523 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:14:29,524 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:14:29,524 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-14 23:14:29,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:14:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:29,579 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:29,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-10-14 23:14:29,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782215878] [2019-10-14 23:14:29,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:14:29,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:14:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:29,581 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 9 states. [2019-10-14 23:14:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:29,755 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-10-14 23:14:29,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:14:29,757 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-10-14 23:14:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:29,758 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:14:29,758 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:14:29,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:14:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2019-10-14 23:14:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:14:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-14 23:14:29,774 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2019-10-14 23:14:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:29,774 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-14 23:14:29,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:14:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-14 23:14:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:14:29,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:29,778 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:29,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:29,982 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash 28174125, now seen corresponding path program 2 times [2019-10-14 23:14:29,983 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:29,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525200848] [2019-10-14 23:14:29,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:29,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:29,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:30,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525200848] [2019-10-14 23:14:30,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290573048] [2019-10-14 23:14:30,080 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 23:14:30,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:30,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:30,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:14:30,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:30,144 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:30,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:14:30,145 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580662590] [2019-10-14 23:14:30,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:14:30,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:30,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:14:30,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:14:30,146 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2019-10-14 23:14:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:30,298 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2019-10-14 23:14:30,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:14:30,298 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-10-14 23:14:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:30,300 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:14:30,300 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:14:30,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:14:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:14:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2019-10-14 23:14:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:14:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-14 23:14:30,308 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2019-10-14 23:14:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:30,309 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-14 23:14:30,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:14:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-14 23:14:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:14:30,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:30,310 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:30,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:30,511 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1009720637, now seen corresponding path program 3 times [2019-10-14 23:14:30,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:30,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525843347] [2019-10-14 23:14:30,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:30,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:30,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:30,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525843347] [2019-10-14 23:14:30,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426115605] [2019-10-14 23:14:30,637 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:30,683 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:14:30,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:30,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:14:30,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:30,707 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:30,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 23:14:30,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587465876] [2019-10-14 23:14:30,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:14:30,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:30,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:14:30,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:30,709 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2019-10-14 23:14:30,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:30,920 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2019-10-14 23:14:30,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:14:30,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-14 23:14:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:30,922 INFO L225 Difference]: With dead ends: 69 [2019-10-14 23:14:30,923 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:14:30,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:30,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:14:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-10-14 23:14:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:14:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 23:14:30,931 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2019-10-14 23:14:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:30,932 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 23:14:30,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:14:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 23:14:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:14:30,933 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:30,933 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:31,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:31,143 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:31,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1372891437, now seen corresponding path program 4 times [2019-10-14 23:14:31,143 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:31,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499300577] [2019-10-14 23:14:31,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:31,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:31,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:31,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499300577] [2019-10-14 23:14:31,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648419769] [2019-10-14 23:14:31,291 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:31,347 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:31,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:31,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:14:31,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:31,370 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:31,370 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:14:31,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106456369] [2019-10-14 23:14:31,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:14:31,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:31,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:14:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:31,371 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2019-10-14 23:14:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:31,579 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2019-10-14 23:14:31,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:14:31,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-10-14 23:14:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:31,580 INFO L225 Difference]: With dead ends: 76 [2019-10-14 23:14:31,581 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 23:14:31,581 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 23:14:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2019-10-14 23:14:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:14:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 23:14:31,595 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2019-10-14 23:14:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:31,596 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 23:14:31,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:14:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 23:14:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:14:31,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:31,597 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:31,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:31,801 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:31,802 INFO L82 PathProgramCache]: Analyzing trace with hash -253715651, now seen corresponding path program 5 times [2019-10-14 23:14:31,802 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:31,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146646775] [2019-10-14 23:14:31,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:31,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:31,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:31,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146646775] [2019-10-14 23:14:31,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32499560] [2019-10-14 23:14:31,962 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:32,278 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 23:14:32,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:32,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:14:32,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:32,307 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:32,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 23:14:32,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111248045] [2019-10-14 23:14:32,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:14:32,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:14:32,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:32,309 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2019-10-14 23:14:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:32,604 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2019-10-14 23:14:32,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:14:32,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-10-14 23:14:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:32,605 INFO L225 Difference]: With dead ends: 83 [2019-10-14 23:14:32,606 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 23:14:32,607 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:32,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 23:14:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 30. [2019-10-14 23:14:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:14:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-10-14 23:14:32,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 19 [2019-10-14 23:14:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:32,616 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-10-14 23:14:32,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:14:32,616 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-10-14 23:14:32,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:14:32,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:32,617 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:32,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:32,818 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:32,819 INFO L82 PathProgramCache]: Analyzing trace with hash 861072173, now seen corresponding path program 6 times [2019-10-14 23:14:32,819 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:32,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523775190] [2019-10-14 23:14:32,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:32,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:32,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:32,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523775190] [2019-10-14 23:14:32,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171445792] [2019-10-14 23:14:32,943 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:33,035 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 23:14:33,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:33,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:14:33,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:33,066 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:33,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 23:14:33,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275552280] [2019-10-14 23:14:33,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:14:33,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:33,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:14:33,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:33,067 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2019-10-14 23:14:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:33,432 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2019-10-14 23:14:33,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:14:33,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-10-14 23:14:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:33,433 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:14:33,434 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:14:33,434 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:14:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 31. [2019-10-14 23:14:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:14:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-10-14 23:14:33,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2019-10-14 23:14:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:33,447 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-10-14 23:14:33,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:14:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-10-14 23:14:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:14:33,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:33,448 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:33,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:33,651 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1059756349, now seen corresponding path program 7 times [2019-10-14 23:14:33,652 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:33,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481783392] [2019-10-14 23:14:33,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:33,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:33,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:33,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481783392] [2019-10-14 23:14:33,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926279118] [2019-10-14 23:14:33,832 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:33,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:14:33,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:33,933 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:33,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:14:33,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335974952] [2019-10-14 23:14:33,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:14:33,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:33,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:14:33,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:33,935 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2019-10-14 23:14:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:34,314 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2019-10-14 23:14:34,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:14:34,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-10-14 23:14:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:34,316 INFO L225 Difference]: With dead ends: 97 [2019-10-14 23:14:34,316 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:14:34,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:14:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 32. [2019-10-14 23:14:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:14:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 23:14:34,326 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2019-10-14 23:14:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:34,326 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 23:14:34,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:14:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 23:14:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:14:34,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:34,327 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:34,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:34,531 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:34,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1370968787, now seen corresponding path program 8 times [2019-10-14 23:14:34,532 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:34,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629220209] [2019-10-14 23:14:34,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:34,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:34,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:34,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629220209] [2019-10-14 23:14:34,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849088858] [2019-10-14 23:14:34,695 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 23:14:34,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:34,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:34,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:14:34,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:34,803 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:34,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:14:34,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701539949] [2019-10-14 23:14:34,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:14:34,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:14:34,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:14:34,805 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 13 states. [2019-10-14 23:14:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:35,335 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2019-10-14 23:14:35,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:14:35,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-10-14 23:14:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:35,337 INFO L225 Difference]: With dead ends: 104 [2019-10-14 23:14:35,337 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 23:14:35,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:14:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 23:14:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 33. [2019-10-14 23:14:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:14:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-14 23:14:35,347 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2019-10-14 23:14:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:35,347 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-14 23:14:35,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:14:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-14 23:14:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:14:35,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:35,348 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:35,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:35,557 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash 585963325, now seen corresponding path program 9 times [2019-10-14 23:14:35,558 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:35,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886974861] [2019-10-14 23:14:35,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:35,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:35,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:35,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886974861] [2019-10-14 23:14:35,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310091493] [2019-10-14 23:14:35,774 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 23:14:36,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:14:36,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:36,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:14:36,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:36,374 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:36,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 23:14:36,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964525851] [2019-10-14 23:14:36,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:14:36,375 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:36,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:14:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:36,376 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2019-10-14 23:14:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:36,918 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2019-10-14 23:14:36,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:14:36,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2019-10-14 23:14:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:36,920 INFO L225 Difference]: With dead ends: 111 [2019-10-14 23:14:36,920 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 23:14:36,921 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 23:14:36,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 34. [2019-10-14 23:14:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:14:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-14 23:14:36,930 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2019-10-14 23:14:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:36,930 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-14 23:14:36,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:14:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-14 23:14:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:14:36,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:36,931 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:37,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:37,137 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1121316653, now seen corresponding path program 10 times [2019-10-14 23:14:37,138 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:37,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408043127] [2019-10-14 23:14:37,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:37,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:37,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:37,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408043127] [2019-10-14 23:14:37,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780654040] [2019-10-14 23:14:37,316 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 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 23:14:37,365 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:37,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:37,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:14:37,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:37,408 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:37,408 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:14:37,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936885852] [2019-10-14 23:14:37,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:14:37,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:14:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:37,410 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2019-10-14 23:14:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:38,041 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2019-10-14 23:14:38,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:14:38,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2019-10-14 23:14:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:38,043 INFO L225 Difference]: With dead ends: 118 [2019-10-14 23:14:38,044 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 23:14:38,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 23:14:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 35. [2019-10-14 23:14:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:14:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 23:14:38,062 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2019-10-14 23:14:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:38,066 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 23:14:38,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:14:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 23:14:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:14:38,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:38,068 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:38,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:38,269 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:38,270 INFO L82 PathProgramCache]: Analyzing trace with hash 537400637, now seen corresponding path program 11 times [2019-10-14 23:14:38,270 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:38,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030433197] [2019-10-14 23:14:38,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:38,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:38,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:38,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030433197] [2019-10-14 23:14:38,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170376999] [2019-10-14 23:14:38,518 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 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