java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:44:15,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:44:15,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:44:15,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:44:15,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:44:15,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:44:15,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:44:15,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:44:15,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:44:15,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:44:15,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:44:15,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:44:15,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:44:15,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:44:15,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:44:15,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:44:15,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:44:15,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:44:15,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:44:15,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:44:15,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:44:15,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:44:15,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:44:15,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:44:15,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:44:15,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:44:15,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:44:15,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:44:15,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:44:15,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:44:15,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:44:15,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:44:15,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:44:15,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:44:15,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:44:15,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:44:15,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:44:15,139 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:44:15,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:44:15,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:44:15,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:44:15,141 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:44:15,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:44:15,141 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:44:15,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:44:15,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:44:15,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:44:15,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:44:15,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:44:15,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:44:15,143 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:44:15,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:44:15,143 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:44:15,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:44:15,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:44:15,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:44:15,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:44:15,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:44:15,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:15,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:44:15,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:44:15,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:44:15,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:44:15,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:44:15,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:44:15,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:44:15,442 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:44:15,456 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:44:15,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:44:15,461 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:44:15,461 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:44:15,462 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-10-14 21:44:15,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5c477bf/450583f9f7dc4da69ff7a281a4398c46/FLAGdea8ad9cd [2019-10-14 21:44:16,053 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:44:16,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-10-14 21:44:16,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5c477bf/450583f9f7dc4da69ff7a281a4398c46/FLAGdea8ad9cd [2019-10-14 21:44:16,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5c477bf/450583f9f7dc4da69ff7a281a4398c46 [2019-10-14 21:44:16,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:44:16,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:44:16,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:16,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:44:16,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:44:16,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2022d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16, skipping insertion in model container [2019-10-14 21:44:16,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,430 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:44:16,447 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:44:16,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:16,638 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:44:16,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:16,686 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:44:16,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16 WrapperNode [2019-10-14 21:44:16,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:16,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:44:16,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:44:16,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:44:16,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (1/1) ... [2019-10-14 21:44:16,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:44:16,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:44:16,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:44:16,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:44:16,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:44:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:44:16,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:44:16,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:44:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:44:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:44:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:44:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:44:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:44:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:44:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:44:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:44:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:44:17,203 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:44:17,203 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 21:44:17,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:17 BoogieIcfgContainer [2019-10-14 21:44:17,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:44:17,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:44:17,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:44:17,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:44:17,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:44:16" (1/3) ... [2019-10-14 21:44:17,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a37dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:17, skipping insertion in model container [2019-10-14 21:44:17,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:16" (2/3) ... [2019-10-14 21:44:17,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a37dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:17, skipping insertion in model container [2019-10-14 21:44:17,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:17" (3/3) ... [2019-10-14 21:44:17,217 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2019-10-14 21:44:17,228 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:44:17,236 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:44:17,247 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:44:17,273 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:44:17,273 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:44:17,274 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:44:17,274 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:44:17,274 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:44:17,274 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:44:17,274 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:44:17,274 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:44:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 21:44:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:44:17,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:17,303 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:17,305 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash 656367922, now seen corresponding path program 1 times [2019-10-14 21:44:17,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:17,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31507649] [2019-10-14 21:44:17,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:17,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31507649] [2019-10-14 21:44:17,511 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:17,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:44:17,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197964341] [2019-10-14 21:44:17,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:44:17,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:17,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:44:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:17,553 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 21:44:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:17,678 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2019-10-14 21:44:17,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:44:17,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-14 21:44:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:17,689 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:44:17,689 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:44:17,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:44:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:44:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:44:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:44:17,735 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-10-14 21:44:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:17,735 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:44:17,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:44:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:44:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:44:17,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:17,737 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:17,738 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1829979950, now seen corresponding path program 1 times [2019-10-14 21:44:17,739 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:17,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673547117] [2019-10-14 21:44:17,739 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:17,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673547117] [2019-10-14 21:44:17,831 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:17,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:17,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333764596] [2019-10-14 21:44:17,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:17,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:17,836 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-10-14 21:44:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:17,963 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-10-14 21:44:17,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:17,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:44:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:17,965 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:44:17,965 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:44:17,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:44:17,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-10-14 21:44:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:44:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-14 21:44:17,976 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2019-10-14 21:44:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:17,976 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-14 21:44:17,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-14 21:44:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:44:17,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:17,978 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:17,979 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1442018896, now seen corresponding path program 1 times [2019-10-14 21:44:17,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:17,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789555517] [2019-10-14 21:44:17,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:44:18,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789555517] [2019-10-14 21:44:18,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235395143] [2019-10-14 21:44:18,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:18,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:44:18,182 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:18,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:44:18,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636488037] [2019-10-14 21:44:18,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:44:18,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:18,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:44:18,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:18,185 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-10-14 21:44:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:18,325 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2019-10-14 21:44:18,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:44:18,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-14 21:44:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:18,328 INFO L225 Difference]: With dead ends: 64 [2019-10-14 21:44:18,328 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:44:18,329 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:44:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-14 21:44:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:44:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-14 21:44:18,338 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2019-10-14 21:44:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:18,338 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-14 21:44:18,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:44:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-14 21:44:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:44:18,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:18,340 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:18,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:18,550 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:18,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:18,551 INFO L82 PathProgramCache]: Analyzing trace with hash 261695650, now seen corresponding path program 2 times [2019-10-14 21:44:18,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:18,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950343085] [2019-10-14 21:44:18,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:18,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:18,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:44:18,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950343085] [2019-10-14 21:44:18,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064307376] [2019-10-14 21:44:18,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:18,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:18,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:18,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:18,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:44:18,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:18,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:44:18,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674717008] [2019-10-14 21:44:18,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:44:18,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:18,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:44:18,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:18,790 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2019-10-14 21:44:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:18,940 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2019-10-14 21:44:18,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:44:18,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2019-10-14 21:44:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:18,942 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:44:18,942 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:44:18,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:44:18,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-10-14 21:44:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:44:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 21:44:18,951 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2019-10-14 21:44:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:18,952 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 21:44:18,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:44:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 21:44:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:44:18,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:18,954 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:19,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:19,158 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1563249348, now seen corresponding path program 3 times [2019-10-14 21:44:19,159 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:19,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904688087] [2019-10-14 21:44:19,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:44:19,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904688087] [2019-10-14 21:44:19,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997045176] [2019-10-14 21:44:19,314 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 21:44:19,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:44:19,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:19,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:44:19,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:44:19,416 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:19,416 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:44:19,416 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048751829] [2019-10-14 21:44:19,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:44:19,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:19,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:44:19,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:19,419 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2019-10-14 21:44:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:19,577 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2019-10-14 21:44:19,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:44:19,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-10-14 21:44:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:19,579 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:44:19,579 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:44:19,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:44:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-10-14 21:44:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:44:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-10-14 21:44:19,589 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2019-10-14 21:44:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:19,589 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-10-14 21:44:19,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:44:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-10-14 21:44:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:44:19,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:19,591 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:19,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:19,797 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1161905130, now seen corresponding path program 4 times [2019-10-14 21:44:19,798 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:19,798 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065399036] [2019-10-14 21:44:19,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 21:44:19,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065399036] [2019-10-14 21:44:19,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835649374] [2019-10-14 21:44:19,987 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 21:44:20,049 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:20,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:20,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:44:20,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 21:44:20,080 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:20,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:44:20,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745971670] [2019-10-14 21:44:20,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:44:20,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:20,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:44:20,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:20,084 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 9 states. [2019-10-14 21:44:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:20,268 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2019-10-14 21:44:20,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:44:20,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-14 21:44:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:20,269 INFO L225 Difference]: With dead ends: 103 [2019-10-14 21:44:20,269 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:44:20,270 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:44:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-10-14 21:44:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 21:44:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-10-14 21:44:20,279 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2019-10-14 21:44:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:20,280 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-10-14 21:44:20,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:44:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-10-14 21:44:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:44:20,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:20,282 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:20,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:20,486 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:20,487 INFO L82 PathProgramCache]: Analyzing trace with hash 104059192, now seen corresponding path program 5 times [2019-10-14 21:44:20,487 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:20,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043665289] [2019-10-14 21:44:20,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:20,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:20,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:44:20,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043665289] [2019-10-14 21:44:20,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480645441] [2019-10-14 21:44:20,724 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 21:44:21,315 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:44:21,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:21,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:44:21,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-14 21:44:21,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:21,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:44:21,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975583152] [2019-10-14 21:44:21,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:44:21,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:44:21,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:21,346 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 10 states. [2019-10-14 21:44:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:21,546 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2019-10-14 21:44:21,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:44:21,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2019-10-14 21:44:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:21,547 INFO L225 Difference]: With dead ends: 116 [2019-10-14 21:44:21,548 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:44:21,549 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:44:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-14 21:44:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:44:21,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-10-14 21:44:21,568 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2019-10-14 21:44:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:21,569 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-10-14 21:44:21,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:44:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-10-14 21:44:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:44:21,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:21,570 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:21,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:21,772 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1385759114, now seen corresponding path program 6 times [2019-10-14 21:44:21,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:21,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051855521] [2019-10-14 21:44:21,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:21,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:21,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 21:44:21,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051855521] [2019-10-14 21:44:21,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600924618] [2019-10-14 21:44:21,908 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 21:44:22,636 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:44:22,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:22,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:44:22,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-14 21:44:22,668 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:22,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:44:22,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934341057] [2019-10-14 21:44:22,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:44:22,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:44:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:22,669 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 11 states. [2019-10-14 21:44:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:22,821 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2019-10-14 21:44:22,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:44:22,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-10-14 21:44:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:22,823 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:44:22,823 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:44:22,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:44:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-10-14 21:44:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:44:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 21:44:22,832 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2019-10-14 21:44:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:22,832 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 21:44:22,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:44:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 21:44:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 21:44:22,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:22,834 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:23,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,048 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:23,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1895565740, now seen corresponding path program 7 times [2019-10-14 21:44:23,049 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:23,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677590297] [2019-10-14 21:44:23,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-14 21:44:23,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677590297] [2019-10-14 21:44:23,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469741094] [2019-10-14 21:44:23,205 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 21:44:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:44:23,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:44:23,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:23,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:44:23,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498022786] [2019-10-14 21:44:23,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:44:23,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:23,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:44:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:23,300 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 12 states. [2019-10-14 21:44:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:23,463 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2019-10-14 21:44:23,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:44:23,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2019-10-14 21:44:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:23,465 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:44:23,465 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 21:44:23,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 21:44:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-10-14 21:44:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 21:44:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-10-14 21:44:23,473 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 68 [2019-10-14 21:44:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:23,474 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-10-14 21:44:23,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:44:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-10-14 21:44:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 21:44:23,475 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:23,475 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:23,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,684 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:23,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:23,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1749223170, now seen corresponding path program 8 times [2019-10-14 21:44:23,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:23,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395282841] [2019-10-14 21:44:23,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-14 21:44:23,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395282841] [2019-10-14 21:44:23,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803454076] [2019-10-14 21:44:23,828 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:23,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:23,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:44:23,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 21:44:23,918 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:23,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:44:23,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374649128] [2019-10-14 21:44:23,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:44:23,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:23,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:44:23,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:23,920 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 13 states. [2019-10-14 21:44:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:24,129 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2019-10-14 21:44:24,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:44:24,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2019-10-14 21:44:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:24,130 INFO L225 Difference]: With dead ends: 155 [2019-10-14 21:44:24,130 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:44:24,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:44:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-10-14 21:44:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 21:44:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-14 21:44:24,140 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2019-10-14 21:44:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:24,140 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-14 21:44:24,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:44:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-14 21:44:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:44:24,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:24,142 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:24,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:24,346 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:24,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1643836448, now seen corresponding path program 9 times [2019-10-14 21:44:24,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:24,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189332046] [2019-10-14 21:44:24,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:24,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:24,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-10-14 21:44:24,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189332046] [2019-10-14 21:44:24,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461888100] [2019-10-14 21:44:24,521 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:44:25,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:25,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:44:25,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-10-14 21:44:25,266 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:25,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:44:25,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529079304] [2019-10-14 21:44:25,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:44:25,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:44:25,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:25,268 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 14 states. [2019-10-14 21:44:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:25,498 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2019-10-14 21:44:25,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:44:25,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2019-10-14 21:44:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:25,499 INFO L225 Difference]: With dead ends: 168 [2019-10-14 21:44:25,500 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:44:25,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:44:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-10-14 21:44:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-14 21:44:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-10-14 21:44:25,508 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2019-10-14 21:44:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:25,508 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-10-14 21:44:25,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:44:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-10-14 21:44:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:44:25,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:25,510 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:25,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,723 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:25,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1732223602, now seen corresponding path program 10 times [2019-10-14 21:44:25,724 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:25,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486984069] [2019-10-14 21:44:25,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-10-14 21:44:25,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486984069] [2019-10-14 21:44:25,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047992630] [2019-10-14 21:44:25,879 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 21:44:25,950 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:25,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:25,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:44:25,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-10-14 21:44:26,034 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:26,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:44:26,036 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261470980] [2019-10-14 21:44:26,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:44:26,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:44:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:26,041 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 15 states. [2019-10-14 21:44:26,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:26,283 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2019-10-14 21:44:26,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:44:26,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2019-10-14 21:44:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:26,284 INFO L225 Difference]: With dead ends: 181 [2019-10-14 21:44:26,284 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 21:44:26,285 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 21:44:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-10-14 21:44:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 21:44:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-14 21:44:26,292 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2019-10-14 21:44:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:26,293 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-14 21:44:26,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:44:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-14 21:44:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 21:44:26,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:26,295 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:26,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,508 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2111467372, now seen corresponding path program 11 times [2019-10-14 21:44:26,509 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:26,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13204158] [2019-10-14 21:44:26,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-10-14 21:44:26,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13204158] [2019-10-14 21:44:26,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144500007] [2019-10-14 21:44:26,681 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