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_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:30,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:30,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:30,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:30,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:30,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:30,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:30,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:30,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:30,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:30,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:30,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:30,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:30,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:30,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:30,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:30,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:30,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:30,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:30,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:30,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:30,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:30,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:30,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:30,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:43:30,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:43:30,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:43:30,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:43:30,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:43:30,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:43:30,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:30,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:30,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:30,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:30,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:30,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:30,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:30,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:30,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:30,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:30,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:30,997 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 21:43:31,018 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:31,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:31,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:31,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:31,022 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:31,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:31,022 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:31,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:31,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:31,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:31,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:31,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:31,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:31,025 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:31,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:31,026 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:31,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:31,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:31,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:31,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:31,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:31,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:31,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:31,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:31,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:31,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:31,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:31,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:31,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:31,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:31,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:31,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:31,372 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:31,372 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:31,373 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2019-10-14 21:43:31,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8d5c885/b2e6e5c8d519417ab95dcef9fac7e382/FLAG00c6bcd94 [2019-10-14 21:43:31,934 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:31,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2019-10-14 21:43:31,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8d5c885/b2e6e5c8d519417ab95dcef9fac7e382/FLAG00c6bcd94 [2019-10-14 21:43:32,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8d5c885/b2e6e5c8d519417ab95dcef9fac7e382 [2019-10-14 21:43:32,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:32,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:32,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:32,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:32,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:32,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128bbf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32, skipping insertion in model container [2019-10-14 21:43:32,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,304 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:32,324 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:32,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:32,548 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:32,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:32,595 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:32,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32 WrapperNode [2019-10-14 21:43:32,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:32,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:32,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:32,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:32,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (1/1) ... [2019-10-14 21:43:32,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:32,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:32,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:32,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:32,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:33,214 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:33,214 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:43:33,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:33 BoogieIcfgContainer [2019-10-14 21:43:33,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:33,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:33,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:33,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:33,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:32" (1/3) ... [2019-10-14 21:43:33,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5411a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:33, skipping insertion in model container [2019-10-14 21:43:33,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:32" (2/3) ... [2019-10-14 21:43:33,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5411a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:33, skipping insertion in model container [2019-10-14 21:43:33,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:33" (3/3) ... [2019-10-14 21:43:33,223 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2019-10-14 21:43:33,230 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:33,237 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:33,247 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:33,274 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:33,274 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:33,274 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:33,274 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:33,274 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:33,275 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:33,275 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:33,275 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-14 21:43:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:43:33,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:33,307 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 21:43:33,309 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:33,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2019-10-14 21:43:33,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:33,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72304373] [2019-10-14 21:43:33,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:33,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:33,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:33,501 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 21:43:33,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72304373] [2019-10-14 21:43:33,503 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:33,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:33,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935722450] [2019-10-14 21:43:33,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:33,513 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:33,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:33,532 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-14 21:43:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:33,710 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2019-10-14 21:43:33,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:33,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-10-14 21:43:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:33,721 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:43:33,722 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:43:33,726 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 21:43:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:43:33,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:43:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:43:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-10-14 21:43:33,772 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2019-10-14 21:43:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:33,772 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-10-14 21:43:33,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-10-14 21:43:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:43:33,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:33,774 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 21:43:33,775 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:33,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2073025378, now seen corresponding path program 1 times [2019-10-14 21:43:33,776 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:33,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226573306] [2019-10-14 21:43:33,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:33,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:33,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:33,888 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 21:43:33,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226573306] [2019-10-14 21:43:33,889 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:33,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:33,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724222054] [2019-10-14 21:43:33,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:33,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:33,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:33,898 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2019-10-14 21:43:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:34,055 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-10-14 21:43:34,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:34,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 21:43:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:34,057 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:43:34,058 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:43:34,061 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 21:43:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:43:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:43:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:43:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-10-14 21:43:34,078 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2019-10-14 21:43:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:34,078 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-10-14 21:43:34,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-10-14 21:43:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:43:34,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:34,082 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:34,083 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash -55785284, now seen corresponding path program 1 times [2019-10-14 21:43:34,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:34,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863806673] [2019-10-14 21:43:34,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:34,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:34,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:34,179 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 21:43:34,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863806673] [2019-10-14 21:43:34,180 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:34,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:34,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891938441] [2019-10-14 21:43:34,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:34,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:34,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:34,182 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2019-10-14 21:43:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:34,375 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2019-10-14 21:43:34,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:34,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-14 21:43:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:34,377 INFO L225 Difference]: With dead ends: 84 [2019-10-14 21:43:34,378 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:43:34,380 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 21:43:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:43:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-10-14 21:43:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:43:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-10-14 21:43:34,389 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 29 [2019-10-14 21:43:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:34,390 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-10-14 21:43:34,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-10-14 21:43:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:43:34,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:34,391 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:34,392 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1132383374, now seen corresponding path program 1 times [2019-10-14 21:43:34,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:34,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951934592] [2019-10-14 21:43:34,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:34,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:34,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:43:34,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951934592] [2019-10-14 21:43:34,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582210515] [2019-10-14 21:43:34,554 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 21:43:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:34,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:34,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:43:34,704 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:34,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:34,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194084289] [2019-10-14 21:43:34,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:34,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:34,707 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2019-10-14 21:43:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:34,821 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-10-14 21:43:34,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:34,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-10-14 21:43:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:34,822 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:43:34,822 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:43:34,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 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 21:43:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:43:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-10-14 21:43:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:43:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-10-14 21:43:34,831 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2019-10-14 21:43:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:34,831 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-10-14 21:43:34,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-10-14 21:43:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:43:34,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:34,833 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:35,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:35,039 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:35,040 INFO L82 PathProgramCache]: Analyzing trace with hash 165377196, now seen corresponding path program 2 times [2019-10-14 21:43:35,041 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:35,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442019234] [2019-10-14 21:43:35,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:35,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:35,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:43:35,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442019234] [2019-10-14 21:43:35,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815336667] [2019-10-14 21:43:35,148 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 21:43:35,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:35,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:35,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:35,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:43:35,231 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:35,231 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:35,231 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718810859] [2019-10-14 21:43:35,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:35,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:35,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:35,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:35,233 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 6 states. [2019-10-14 21:43:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:35,442 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2019-10-14 21:43:35,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:35,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-10-14 21:43:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:35,444 INFO L225 Difference]: With dead ends: 106 [2019-10-14 21:43:35,444 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:43:35,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 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 21:43:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:43:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2019-10-14 21:43:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:43:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-10-14 21:43:35,468 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 45 [2019-10-14 21:43:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:35,468 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-10-14 21:43:35,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-10-14 21:43:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:43:35,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:35,474 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:35,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:35,676 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1415468158, now seen corresponding path program 3 times [2019-10-14 21:43:35,676 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:35,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119377288] [2019-10-14 21:43:35,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:35,678 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:35,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:43:35,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119377288] [2019-10-14 21:43:35,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866381138] [2019-10-14 21:43:35,804 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 21:43:35,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:35,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:35,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:35,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:43:35,924 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:35,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:43:35,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387746767] [2019-10-14 21:43:35,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:43:35,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:35,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:43:35,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:35,926 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 7 states. [2019-10-14 21:43:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:36,133 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2019-10-14 21:43:36,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:43:36,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2019-10-14 21:43:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:36,135 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:43:36,135 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:43:36,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 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 21:43:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:43:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2019-10-14 21:43:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 21:43:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2019-10-14 21:43:36,145 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 59 [2019-10-14 21:43:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:36,146 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2019-10-14 21:43:36,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:43:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2019-10-14 21:43:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:43:36,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:36,148 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:36,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:36,350 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:36,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1535075120, now seen corresponding path program 4 times [2019-10-14 21:43:36,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:36,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270123793] [2019-10-14 21:43:36,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:36,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:36,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-14 21:43:36,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270123793] [2019-10-14 21:43:36,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373256633] [2019-10-14 21:43:36,529 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 21:43:36,608 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:36,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:36,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:36,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-14 21:43:36,639 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:36,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:43:36,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499170332] [2019-10-14 21:43:36,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:43:36,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:36,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:43:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:36,641 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 8 states. [2019-10-14 21:43:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:36,892 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2019-10-14 21:43:36,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:43:36,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2019-10-14 21:43:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:36,894 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:43:36,894 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 21:43:36,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 21:43:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2019-10-14 21:43:36,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-14 21:43:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2019-10-14 21:43:36,909 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 73 [2019-10-14 21:43:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:36,909 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2019-10-14 21:43:36,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:43:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2019-10-14 21:43:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 21:43:36,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:36,911 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:37,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:37,122 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:37,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1208914526, now seen corresponding path program 5 times [2019-10-14 21:43:37,122 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:37,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826231804] [2019-10-14 21:43:37,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:37,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:37,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 21:43:37,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826231804] [2019-10-14 21:43:37,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400583829] [2019-10-14 21:43:37,271 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