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_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:20,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:20,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:20,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:20,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:20,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:20,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:20,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:20,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:20,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:20,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:20,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:20,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:20,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:20,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:20,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:20,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:20,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:20,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:20,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:20,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:20,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:20,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:20,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:20,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:20,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:20,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:20,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:20,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:20,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:20,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:20,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:20,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:20,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:20,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:20,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:20,091 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 21:43:20,106 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:20,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:20,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:20,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:20,108 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:20,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:20,109 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:20,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:20,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:20,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:20,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:20,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:20,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:20,110 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:20,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:20,110 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:20,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:20,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:20,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:20,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:20,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:20,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:20,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:20,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:20,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:20,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:20,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:20,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:20,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:20,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:20,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:20,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:20,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:20,423 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:20,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2019-10-14 21:43:20,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a473ddc6d/43befe00d3fa4aebabb22dd95eabec4d/FLAG542778903 [2019-10-14 21:43:20,984 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:20,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2019-10-14 21:43:20,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a473ddc6d/43befe00d3fa4aebabb22dd95eabec4d/FLAG542778903 [2019-10-14 21:43:21,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a473ddc6d/43befe00d3fa4aebabb22dd95eabec4d [2019-10-14 21:43:21,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:21,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:21,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:21,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:21,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:21,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@783ac0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21, skipping insertion in model container [2019-10-14 21:43:21,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,437 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:21,461 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:21,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:21,641 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:21,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:21,682 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:21,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21 WrapperNode [2019-10-14 21:43:21,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:21,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:21,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:21,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:21,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (1/1) ... [2019-10-14 21:43:21,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:21,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:21,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:21,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:21,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (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 21:43:21,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:21,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:21,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:21,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:21,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:22,172 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:22,172 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 21:43:22,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:22 BoogieIcfgContainer [2019-10-14 21:43:22,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:22,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:22,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:22,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:22,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:21" (1/3) ... [2019-10-14 21:43:22,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aadbbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:22, skipping insertion in model container [2019-10-14 21:43:22,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:21" (2/3) ... [2019-10-14 21:43:22,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aadbbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:22, skipping insertion in model container [2019-10-14 21:43:22,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:22" (3/3) ... [2019-10-14 21:43:22,199 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2019-10-14 21:43:22,211 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:22,218 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:22,227 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:22,254 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:22,254 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:22,254 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:22,254 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:22,254 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:22,255 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:22,255 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:22,255 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 21:43:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:43:22,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:22,279 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 21:43:22,280 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:22,286 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2019-10-14 21:43:22,294 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:22,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953457806] [2019-10-14 21:43:22,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,459 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 21:43:22,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953457806] [2019-10-14 21:43:22,463 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:22,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:22,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847894798] [2019-10-14 21:43:22,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:22,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:22,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:22,487 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-14 21:43:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:22,633 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-10-14 21:43:22,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:22,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-14 21:43:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:22,644 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:43:22,644 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:43:22,648 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 21:43:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:43:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:43:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:43:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:43:22,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-10-14 21:43:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:22,690 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:43:22,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:43:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:43:22,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:22,692 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 21:43:22,692 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:22,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1263989582, now seen corresponding path program 1 times [2019-10-14 21:43:22,693 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:22,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610907634] [2019-10-14 21:43:22,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,770 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 21:43:22,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610907634] [2019-10-14 21:43:22,771 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:22,771 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:22,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921871436] [2019-10-14 21:43:22,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:22,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:22,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:22,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:22,774 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2019-10-14 21:43:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:22,897 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-10-14 21:43:22,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:22,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:43:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:22,901 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:43:22,902 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:43:22,903 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 21:43:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:43:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:43:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:43:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 21:43:22,915 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2019-10-14 21:43:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:22,916 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 21:43:22,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 21:43:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:43:22,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:22,920 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] [2019-10-14 21:43:22,921 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:22,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1258945684, now seen corresponding path program 1 times [2019-10-14 21:43:22,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:22,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960304031] [2019-10-14 21:43:22,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:23,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960304031] [2019-10-14 21:43:23,029 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:23,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:23,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558925718] [2019-10-14 21:43:23,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:23,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:23,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:23,032 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2019-10-14 21:43:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:23,123 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2019-10-14 21:43:23,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:23,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:43:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:23,124 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:43:23,125 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:43:23,125 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 21:43:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:43:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-14 21:43:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:43:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-14 21:43:23,132 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2019-10-14 21:43:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:23,133 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-14 21:43:23,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-14 21:43:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:43:23,134 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:23,135 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:23,135 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:23,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458438, now seen corresponding path program 1 times [2019-10-14 21:43:23,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:23,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592605957] [2019-10-14 21:43:23,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,241 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 21:43:23,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592605957] [2019-10-14 21:43:23,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871558926] [2019-10-14 21:43:23,242 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 21:43:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:23,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:23,357 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 21:43:23,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:23,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:23,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836263550] [2019-10-14 21:43:23,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:23,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:23,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:23,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:23,359 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2019-10-14 21:43:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:23,447 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:43:23,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:23,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-10-14 21:43:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:23,449 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:43:23,449 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:43:23,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 21:43:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:43:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 21:43:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:43:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-14 21:43:23,456 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2019-10-14 21:43:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:23,457 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-14 21:43:23,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-14 21:43:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:43:23,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:23,458 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:23,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:23,663 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1956939620, now seen corresponding path program 2 times [2019-10-14 21:43:23,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:23,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765907642] [2019-10-14 21:43:23,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:43:23,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765907642] [2019-10-14 21:43:23,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420755911] [2019-10-14 21:43:23,773 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 21:43:23,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:23,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:23,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:23,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:43:23,862 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:23,863 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:23,863 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939862112] [2019-10-14 21:43:23,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:23,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:23,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:23,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:23,865 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2019-10-14 21:43:23,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:23,950 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2019-10-14 21:43:23,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:23,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-10-14 21:43:23,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:23,951 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:43:23,952 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:43:23,952 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 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 21:43:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:43:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-14 21:43:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:43:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-10-14 21:43:23,959 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2019-10-14 21:43:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:23,959 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-10-14 21:43:23,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-10-14 21:43:23,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:43:23,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:23,961 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:24,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:24,165 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1423302462, now seen corresponding path program 3 times [2019-10-14 21:43:24,166 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527017687] [2019-10-14 21:43:24,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:43:24,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527017687] [2019-10-14 21:43:24,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211758765] [2019-10-14 21:43:24,298 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 21:43:24,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:24,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:24,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:24,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:43:24,391 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:24,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:43:24,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887198190] [2019-10-14 21:43:24,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:43:24,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:43:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:24,395 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2019-10-14 21:43:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,524 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2019-10-14 21:43:24,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:43:24,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-14 21:43:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,526 INFO L225 Difference]: With dead ends: 72 [2019-10-14 21:43:24,526 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:43:24,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 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 21:43:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:43:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-10-14 21:43:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:43:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-10-14 21:43:24,540 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2019-10-14 21:43:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,541 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-10-14 21:43:24,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:43:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-10-14 21:43:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:43:24,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,544 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:24,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:24,751 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -808703080, now seen corresponding path program 4 times [2019-10-14 21:43:24,752 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897006463] [2019-10-14 21:43:24,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:43:24,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897006463] [2019-10-14 21:43:24,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923149670] [2019-10-14 21:43:24,891 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 21:43:24,956 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:24,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:24,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:24,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:43:25,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:25,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-14 21:43:25,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959940643] [2019-10-14 21:43:25,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:43:25,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:43:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:25,019 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 10 states. [2019-10-14 21:43:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,194 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2019-10-14 21:43:25,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:43:25,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-10-14 21:43:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,195 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:43:25,195 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:43:25,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:43:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2019-10-14 21:43:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:43:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-14 21:43:25,203 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2019-10-14 21:43:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,204 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-14 21:43:25,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:43:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-14 21:43:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:43:25,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,206 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:25,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,419 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1392108432, now seen corresponding path program 5 times [2019-10-14 21:43:25,420 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841088544] [2019-10-14 21:43:25,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 21:43:25,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841088544] [2019-10-14 21:43:25,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543710791] [2019-10-14 21:43:25,504 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 21:43:26,898 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:43:26,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:26,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:26,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:43:26,955 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:26,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-14 21:43:26,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825673813] [2019-10-14 21:43:26,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:26,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:26,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:26,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:26,956 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 12 states. [2019-10-14 21:43:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,132 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2019-10-14 21:43:27,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:27,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-10-14 21:43:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,135 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:43:27,136 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:43:27,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:43:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-10-14 21:43:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:43:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-10-14 21:43:27,153 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 49 [2019-10-14 21:43:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:27,154 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-10-14 21:43:27,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-10-14 21:43:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:43:27,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:27,158 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:27,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:27,368 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:27,368 INFO L82 PathProgramCache]: Analyzing trace with hash -846363768, now seen corresponding path program 6 times [2019-10-14 21:43:27,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:27,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834494124] [2019-10-14 21:43:27,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:43:27,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834494124] [2019-10-14 21:43:27,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234921725] [2019-10-14 21:43:27,478 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 21:43:27,588 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-14 21:43:27,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:27,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:43:27,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:43:27,666 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:27,667 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-14 21:43:27,667 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253984128] [2019-10-14 21:43:27,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:43:27,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:43:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:43:27,668 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 14 states. [2019-10-14 21:43:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,870 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2019-10-14 21:43:27,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:43:27,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-10-14 21:43:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,872 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:43:27,873 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:43:27,874 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:43:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:43:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2019-10-14 21:43:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:43:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-10-14 21:43:27,882 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 57 [2019-10-14 21:43:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:27,882 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-10-14 21:43:27,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:43:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-10-14 21:43:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:43:27,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:27,884 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:28,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:28,089 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:28,090 INFO L82 PathProgramCache]: Analyzing trace with hash 510593920, now seen corresponding path program 7 times [2019-10-14 21:43:28,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:28,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890349045] [2019-10-14 21:43:28,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:28,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:28,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-14 21:43:28,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890349045] [2019-10-14 21:43:28,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706524630] [2019-10-14 21:43:28,231 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 21:43:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:43:28,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 21:43:28,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:28,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-10-14 21:43:28,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865979862] [2019-10-14 21:43:28,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:43:28,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:28,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:43:28,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:43:28,380 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 16 states. [2019-10-14 21:43:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:28,610 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2019-10-14 21:43:28,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:43:28,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-10-14 21:43:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:28,612 INFO L225 Difference]: With dead ends: 135 [2019-10-14 21:43:28,613 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 21:43:28,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:43:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 21:43:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2019-10-14 21:43:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 21:43:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-10-14 21:43:28,622 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 65 [2019-10-14 21:43:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:28,623 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-10-14 21:43:28,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:43:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-10-14 21:43:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:43:28,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:28,624 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:28,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:28,833 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash 780565368, now seen corresponding path program 8 times [2019-10-14 21:43:28,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:28,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25932890] [2019-10-14 21:43:28,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:28,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:28,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-10-14 21:43:28,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25932890] [2019-10-14 21:43:28,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016200352] [2019-10-14 21:43:29,000 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 21:43:29,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:29,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:29,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:43:29,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:43:29,166 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:29,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-10-14 21:43:29,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341321054] [2019-10-14 21:43:29,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:43:29,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:29,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:43:29,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:43:29,168 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 18 states. [2019-10-14 21:43:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:29,488 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2019-10-14 21:43:29,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:43:29,488 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2019-10-14 21:43:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:29,489 INFO L225 Difference]: With dead ends: 149 [2019-10-14 21:43:29,489 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:43:29,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:43:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:43:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2019-10-14 21:43:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:43:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-10-14 21:43:29,499 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 73 [2019-10-14 21:43:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:29,499 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-10-14 21:43:29,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:43:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-10-14 21:43:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:43:29,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:29,505 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:29,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,708 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash -256126096, now seen corresponding path program 9 times [2019-10-14 21:43:29,709 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299535950] [2019-10-14 21:43:29,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-14 21:43:29,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299535950] [2019-10-14 21:43:29,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060327424] [2019-10-14 21:43:29,861 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 21:43:33,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:43:33,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:33,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:43:33,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 21:43:33,977 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:33,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-10-14 21:43:33,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344775653] [2019-10-14 21:43:33,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:43:33,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:33,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:43:33,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:43:33,979 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 20 states. [2019-10-14 21:43:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:34,286 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2019-10-14 21:43:34,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:43:34,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-10-14 21:43:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:34,288 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:43:34,288 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:43:34,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:43:34,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:43:34,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2019-10-14 21:43:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-14 21:43:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-10-14 21:43:34,307 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2019-10-14 21:43:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:34,307 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-10-14 21:43:34,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:43:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-10-14 21:43:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:43:34,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:34,309 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:34,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:34,510 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1643582312, now seen corresponding path program 10 times [2019-10-14 21:43:34,511 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:34,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406152518] [2019-10-14 21:43:34,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:34,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:34,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-10-14 21:43:34,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406152518] [2019-10-14 21:43:34,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839090830] [2019-10-14 21:43:34,658 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 21:43:34,759 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:34,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:34,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:43:34,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-14 21:43:34,965 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:34,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-10-14 21:43:34,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586471601] [2019-10-14 21:43:34,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:43:34,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:34,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:43:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:34,970 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 22 states. [2019-10-14 21:43:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:35,248 INFO L93 Difference]: Finished difference Result 177 states and 188 transitions. [2019-10-14 21:43:35,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:43:35,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2019-10-14 21:43:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:35,250 INFO L225 Difference]: With dead ends: 177 [2019-10-14 21:43:35,250 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 21:43:35,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 21:43:35,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2019-10-14 21:43:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 21:43:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2019-10-14 21:43:35,266 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 89 [2019-10-14 21:43:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:35,267 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2019-10-14 21:43:35,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:43:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2019-10-14 21:43:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 21:43:35,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:35,270 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:35,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:35,475 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1994376352, now seen corresponding path program 11 times [2019-10-14 21:43:35,475 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:35,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046610355] [2019-10-14 21:43:35,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:35,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:35,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-10-14 21:43:35,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046610355] [2019-10-14 21:43:35,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786776021] [2019-10-14 21:43:35,593 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