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_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:47:46,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:47:46,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:47:46,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:47:46,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:47:46,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:47:46,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:47:46,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:47:46,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:47:46,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:47:46,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:47:46,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:47:46,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:47:46,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:47:46,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:47:46,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:47:46,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:47:46,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:47:46,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:47:46,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:47:46,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:47:46,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:47:46,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:47:46,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:47:46,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:47:46,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:47:46,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:47:46,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:47:46,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:47:46,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:47:46,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:47:46,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:47:46,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:47:46,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:47:46,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:47:46,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:47:46,089 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 [2019-10-13 17:47:46,119 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:47:46,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:47:46,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:47:46,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:47:46,126 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:47:46,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:47:46,127 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:47:46,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:47:46,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:47:46,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:47:46,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:47:46,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:47:46,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:47:46,128 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:47:46,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:47:46,128 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:47:46,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:47:46,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:47:46,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:47:46,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:47:46,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:47:46,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:47:46,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:47:46,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:47:46,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:47:46,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:47:46,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:47:46,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:47:46,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:47:46,398 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:47:46,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:47:46,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:47:46,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:47:46,424 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:47:46,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2019-10-13 17:47:46,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca64113e/e1755476313e4d8399abc32eed61cb4d/FLAG0c69a1a36 [2019-10-13 17:47:46,911 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:47:46,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2019-10-13 17:47:46,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca64113e/e1755476313e4d8399abc32eed61cb4d/FLAG0c69a1a36 [2019-10-13 17:47:47,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca64113e/e1755476313e4d8399abc32eed61cb4d [2019-10-13 17:47:47,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:47:47,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:47:47,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:47,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:47:47,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:47:47,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433c8d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47, skipping insertion in model container [2019-10-13 17:47:47,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,321 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:47:47,337 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:47:47,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:47,493 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:47:47,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:47,535 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:47:47,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47 WrapperNode [2019-10-13 17:47:47,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:47,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:47:47,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:47:47,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:47:47,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (1/1) ... [2019-10-13 17:47:47,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:47:47,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:47:47,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:47:47,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:47:47,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (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 [2019-10-13 17:47:47,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:47:47,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:47:47,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:47:47,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:47:47,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:47:47,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:47:47,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:47:47,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:47:47,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:47:47,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:47:47,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:47:47,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:47:47,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:47:47,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:47:47,957 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:47:47,957 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:47:47,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:47 BoogieIcfgContainer [2019-10-13 17:47:47,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:47:47,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:47:47,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:47:47,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:47:47,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:47:47" (1/3) ... [2019-10-13 17:47:47,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6643da3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:47, skipping insertion in model container [2019-10-13 17:47:47,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:47" (2/3) ... [2019-10-13 17:47:47,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6643da3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:47, skipping insertion in model container [2019-10-13 17:47:47,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:47" (3/3) ... [2019-10-13 17:47:47,969 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2019-10-13 17:47:47,983 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:47:47,991 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:47:48,025 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:47:48,066 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:47:48,066 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:47:48,066 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:47:48,067 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:47:48,067 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:47:48,067 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:47:48,067 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:47:48,067 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:47:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-13 17:47:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:47:48,086 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:48,086 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:48,088 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:48,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1229081071, now seen corresponding path program 1 times [2019-10-13 17:47:48,100 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:48,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892163444] [2019-10-13 17:47:48,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:48,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892163444] [2019-10-13 17:47:48,269 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:48,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:47:48,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719574437] [2019-10-13 17:47:48,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:47:48,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:47:48,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:47:48,296 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-13 17:47:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:48,413 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2019-10-13 17:47:48,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:47:48,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:47:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:48,424 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:47:48,425 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 17:47:48,428 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 [2019-10-13 17:47:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 17:47:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 17:47:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 17:47:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-13 17:47:48,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-10-13 17:47:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:48,465 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-13 17:47:48,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:47:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-13 17:47:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:47:48,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:48,467 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:48,467 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash -959296020, now seen corresponding path program 1 times [2019-10-13 17:47:48,468 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:48,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773428849] [2019-10-13 17:47:48,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:48,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773428849] [2019-10-13 17:47:48,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:48,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:47:48,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173406528] [2019-10-13 17:47:48,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:47:48,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:48,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:47:48,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:48,576 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2019-10-13 17:47:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:48,642 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2019-10-13 17:47:48,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:47:48,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:47:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:48,644 INFO L225 Difference]: With dead ends: 38 [2019-10-13 17:47:48,644 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 17:47:48,645 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 [2019-10-13 17:47:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 17:47:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 17:47:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 17:47:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-10-13 17:47:48,652 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2019-10-13 17:47:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:48,652 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-10-13 17:47:48,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:47:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-10-13 17:47:48,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 17:47:48,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:48,654 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:48,654 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash 71345632, now seen corresponding path program 1 times [2019-10-13 17:47:48,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:48,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073838209] [2019-10-13 17:47:48,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:48,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073838209] [2019-10-13 17:47:48,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606172611] [2019-10-13 17:47:48,756 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 [2019-10-13 17:47:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:47:48,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:48,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:48,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:47:48,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449628807] [2019-10-13 17:47:48,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:47:48,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:48,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:47:48,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:48,849 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2019-10-13 17:47:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:48,926 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-10-13 17:47:48,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:47:48,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-13 17:47:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:48,927 INFO L225 Difference]: With dead ends: 39 [2019-10-13 17:47:48,928 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 17:47:48,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 17:47:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 17:47:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 17:47:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-13 17:47:48,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2019-10-13 17:47:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:48,940 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-13 17:47:48,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:47:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-13 17:47:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:47:48,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:48,942 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:49,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:49,144 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:49,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1956465772, now seen corresponding path program 2 times [2019-10-13 17:47:49,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:49,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383311949] [2019-10-13 17:47:49,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:49,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:49,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:49,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383311949] [2019-10-13 17:47:49,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424398365] [2019-10-13 17:47:49,245 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 [2019-10-13 17:47:49,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:47:49,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:49,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:47:49,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:49,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:47:49,416 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:47:49,416 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-10-13 17:47:49,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269846495] [2019-10-13 17:47:49,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:47:49,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:47:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:47:49,419 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2019-10-13 17:47:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:49,563 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-10-13 17:47:49,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:47:49,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-13 17:47:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:49,569 INFO L225 Difference]: With dead ends: 51 [2019-10-13 17:47:49,569 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 17:47:49,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:47:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 17:47:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2019-10-13 17:47:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:47:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-13 17:47:49,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2019-10-13 17:47:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:49,590 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-13 17:47:49,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:47:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-13 17:47:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:47:49,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:49,591 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:49,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:49,800 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1563438762, now seen corresponding path program 1 times [2019-10-13 17:47:49,802 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:49,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638820932] [2019-10-13 17:47:49,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:49,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:49,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:47:49,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638820932] [2019-10-13 17:47:49,851 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:49,851 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:47:49,851 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129064930] [2019-10-13 17:47:49,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:47:49,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:49,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:47:49,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:47:49,852 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2019-10-13 17:47:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:49,955 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-10-13 17:47:49,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:47:49,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-13 17:47:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:49,957 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:47:49,957 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 17:47:49,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 17:47:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-10-13 17:47:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:47:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-13 17:47:49,963 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-13 17:47:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:49,963 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-13 17:47:49,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:47:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-13 17:47:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 17:47:49,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:49,964 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:49,964 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:49,965 INFO L82 PathProgramCache]: Analyzing trace with hash -304823251, now seen corresponding path program 1 times [2019-10-13 17:47:49,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:49,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214660404] [2019-10-13 17:47:49,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:49,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:49,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:47:50,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214660404] [2019-10-13 17:47:50,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237677455] [2019-10-13 17:47:50,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:50,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:50,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:47:50,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:50,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:47:50,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271340245] [2019-10-13 17:47:50,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:47:50,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:50,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:47:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:50,217 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2019-10-13 17:47:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:50,314 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-10-13 17:47:50,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:47:50,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-10-13 17:47:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:50,315 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:47:50,315 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:47:50,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:47:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-13 17:47:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:47:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-13 17:47:50,330 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2019-10-13 17:47:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:50,331 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-13 17:47:50,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:47:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-13 17:47:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:47:50,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:50,332 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:50,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:50,541 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -81574727, now seen corresponding path program 2 times [2019-10-13 17:47:50,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:50,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128921834] [2019-10-13 17:47:50,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:50,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:50,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:47:50,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128921834] [2019-10-13 17:47:50,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987829426] [2019-10-13 17:47:50,640 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 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 [2019-10-13 17:47:50,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:50,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:50,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:47:50,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:47:50,720 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:50,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-13 17:47:50,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996375118] [2019-10-13 17:47:50,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:47:50,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:50,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:47:50,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:47:50,722 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2019-10-13 17:47:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:50,790 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-10-13 17:47:50,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:47:50,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-13 17:47:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:50,791 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:47:50,791 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:47:50,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:47:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:47:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-13 17:47:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:47:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-13 17:47:50,797 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2019-10-13 17:47:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:50,798 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-13 17:47:50,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:47:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-13 17:47:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 17:47:50,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:50,799 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:51,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:51,003 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:51,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1750805075, now seen corresponding path program 3 times [2019-10-13 17:47:51,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:51,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333825441] [2019-10-13 17:47:51,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:51,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:51,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:47:51,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333825441] [2019-10-13 17:47:51,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779209219] [2019-10-13 17:47:51,100 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 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 [2019-10-13 17:47:51,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:47:51,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:51,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:47:51,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:51,182 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:47:51,182 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:51,190 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:51,191 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:51,191 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-13 17:47:51,215 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-10-13 17:47:51,216 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:51,223 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:51,223 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:51,224 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-13 17:47:51,272 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-13 17:47:51,272 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:51,276 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:51,277 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:51,277 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-13 17:47:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:47:51,309 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:51,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-13 17:47:51,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905846195] [2019-10-13 17:47:51,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:47:51,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:47:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:47:51,311 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 14 states. [2019-10-13 17:47:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:51,646 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2019-10-13 17:47:51,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:47:51,647 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2019-10-13 17:47:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:51,648 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:47:51,649 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 17:47:51,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:47:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 17:47:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-13 17:47:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 17:47:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-10-13 17:47:51,656 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 25 [2019-10-13 17:47:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:51,656 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-10-13 17:47:51,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:47:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-10-13 17:47:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 17:47:51,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:51,657 INFO L380 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:51,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:51,864 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:51,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1844458623, now seen corresponding path program 1 times [2019-10-13 17:47:51,865 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:51,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466422839] [2019-10-13 17:47:51,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:51,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:51,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:47:51,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466422839] [2019-10-13 17:47:51,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227424920] [2019-10-13 17:47:51,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:47:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:52,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:47:52,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:52,044 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:52,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 17:47:52,044 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557191194] [2019-10-13 17:47:52,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:47:52,045 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:52,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:47:52,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:47:52,045 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2019-10-13 17:47:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:52,111 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2019-10-13 17:47:52,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:47:52,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-10-13 17:47:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:52,114 INFO L225 Difference]: With dead ends: 65 [2019-10-13 17:47:52,114 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 17:47:52,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:47:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 17:47:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-13 17:47:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:47:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-10-13 17:47:52,133 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 35 [2019-10-13 17:47:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:52,134 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-10-13 17:47:52,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:47:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-10-13 17:47:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:47:52,137 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:52,137 INFO L380 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:52,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:52,338 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash 222681613, now seen corresponding path program 2 times [2019-10-13 17:47:52,339 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:52,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757963742] [2019-10-13 17:47:52,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:52,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:52,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:47:52,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757963742] [2019-10-13 17:47:52,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810064466] [2019-10-13 17:47:52,433 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 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 [2019-10-13 17:47:52,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:52,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:52,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:47:52,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:52,532 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:52,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 17:47:52,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196876117] [2019-10-13 17:47:52,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:47:52,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:52,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:47:52,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:47:52,534 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 11 states. [2019-10-13 17:47:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:52,611 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2019-10-13 17:47:52,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:47:52,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2019-10-13 17:47:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:52,613 INFO L225 Difference]: With dead ends: 66 [2019-10-13 17:47:52,613 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 17:47:52,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:47:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 17:47:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-13 17:47:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 17:47:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-13 17:47:52,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2019-10-13 17:47:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:52,621 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-13 17:47:52,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:47:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-13 17:47:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 17:47:52,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:52,623 INFO L380 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:52,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:52,827 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash -120480511, now seen corresponding path program 3 times [2019-10-13 17:47:52,828 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:52,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026808380] [2019-10-13 17:47:52,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:52,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:52,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:47:52,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026808380] [2019-10-13 17:47:52,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114666477] [2019-10-13 17:47:52,914 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 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 [2019-10-13 17:47:52,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:47:52,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:52,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:47:52,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 17:47:53,183 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:53,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-10-13 17:47:53,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896306590] [2019-10-13 17:47:53,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:47:53,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:53,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:47:53,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:53,184 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 19 states. [2019-10-13 17:47:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:53,631 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2019-10-13 17:47:53,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:47:53,632 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2019-10-13 17:47:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:53,633 INFO L225 Difference]: With dead ends: 95 [2019-10-13 17:47:53,633 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 17:47:53,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:47:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 17:47:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2019-10-13 17:47:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 17:47:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-13 17:47:53,640 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2019-10-13 17:47:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:53,640 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-13 17:47:53,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:47:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-13 17:47:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:47:53,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:53,642 INFO L380 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:53,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:53,845 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash 437451791, now seen corresponding path program 1 times [2019-10-13 17:47:53,846 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:53,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481855897] [2019-10-13 17:47:53,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:53,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:53,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:47:53,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481855897] [2019-10-13 17:47:53,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413533270] [2019-10-13 17:47:53,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:47:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:54,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:47:54,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:54,038 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:54,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:47:54,038 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396674039] [2019-10-13 17:47:54,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:47:54,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:54,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:47:54,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:54,040 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 13 states. [2019-10-13 17:47:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:54,132 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-10-13 17:47:54,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:47:54,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-10-13 17:47:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:54,134 INFO L225 Difference]: With dead ends: 74 [2019-10-13 17:47:54,134 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 17:47:54,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 17:47:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-13 17:47:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:47:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-13 17:47:54,141 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 38 [2019-10-13 17:47:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:54,141 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-13 17:47:54,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:47:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-13 17:47:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:47:54,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:54,142 INFO L380 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:54,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:54,346 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1371132419, now seen corresponding path program 2 times [2019-10-13 17:47:54,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:54,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790049373] [2019-10-13 17:47:54,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:54,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:54,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:47:54,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790049373] [2019-10-13 17:47:54,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312705810] [2019-10-13 17:47:54,456 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 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 [2019-10-13 17:47:54,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:54,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:54,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:47:54,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:54,528 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:54,528 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-13 17:47:54,528 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170482812] [2019-10-13 17:47:54,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:47:54,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:54,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:47:54,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:47:54,530 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-13 17:47:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:54,608 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-10-13 17:47:54,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:47:54,609 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-10-13 17:47:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:54,610 INFO L225 Difference]: With dead ends: 75 [2019-10-13 17:47:54,610 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:47:54,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:47:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:47:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-13 17:47:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 17:47:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-10-13 17:47:54,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2019-10-13 17:47:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:54,617 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-10-13 17:47:54,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:47:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-10-13 17:47:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:47:54,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:54,618 INFO L380 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:54,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:54,822 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:54,823 INFO L82 PathProgramCache]: Analyzing trace with hash 250460815, now seen corresponding path program 3 times [2019-10-13 17:47:54,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:54,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514032736] [2019-10-13 17:47:54,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:54,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:54,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:47:54,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514032736] [2019-10-13 17:47:54,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421060139] [2019-10-13 17:47:54,961 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:55,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:47:55,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:55,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:55,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:55,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-13 17:47:55,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:55,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 17:47:55,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804040723] [2019-10-13 17:47:55,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:47:55,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:55,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:47:55,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:47:55,053 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 17 states. [2019-10-13 17:47:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:55,439 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2019-10-13 17:47:55,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:47:55,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-10-13 17:47:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:55,440 INFO L225 Difference]: With dead ends: 82 [2019-10-13 17:47:55,440 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 17:47:55,441 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:47:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 17:47:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-10-13 17:47:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:47:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-13 17:47:55,446 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2019-10-13 17:47:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:55,447 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-13 17:47:55,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:47:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-13 17:47:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:47:55,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:55,448 INFO L380 BasicCegarLoop]: trace histogram [11, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:55,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:55,652 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2056854566, now seen corresponding path program 4 times [2019-10-13 17:47:55,652 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:55,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147864044] [2019-10-13 17:47:55,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:55,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:55,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:47:55,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147864044] [2019-10-13 17:47:55,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243300959] [2019-10-13 17:47:55,792 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:55,848 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:55,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:55,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:47:55,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:47:55,875 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:55,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:47:55,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611559877] [2019-10-13 17:47:55,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:47:55,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:55,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:47:55,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:55,876 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 16 states. [2019-10-13 17:47:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:55,979 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2019-10-13 17:47:55,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:47:55,979 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2019-10-13 17:47:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:55,980 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:47:55,980 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 17:47:55,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 17:47:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-13 17:47:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 17:47:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-10-13 17:47:55,995 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 44 [2019-10-13 17:47:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:55,995 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-10-13 17:47:55,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:47:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-10-13 17:47:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 17:47:55,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:55,996 INFO L380 BasicCegarLoop]: trace histogram [12, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:56,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:56,202 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:56,203 INFO L82 PathProgramCache]: Analyzing trace with hash -481660210, now seen corresponding path program 5 times [2019-10-13 17:47:56,204 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:56,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643079492] [2019-10-13 17:47:56,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:56,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:56,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:47:56,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643079492] [2019-10-13 17:47:56,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897319922] [2019-10-13 17:47:56,336 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:56,485 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 17:47:56,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:56,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:47:56,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:47:56,516 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:56,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-13 17:47:56,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595207761] [2019-10-13 17:47:56,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:47:56,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:47:56,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:47:56,521 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 17 states. [2019-10-13 17:47:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:56,615 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2019-10-13 17:47:56,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:47:56,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2019-10-13 17:47:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:56,616 INFO L225 Difference]: With dead ends: 78 [2019-10-13 17:47:56,616 INFO L226 Difference]: Without dead ends: 49 [2019-10-13 17:47:56,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:47:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-13 17:47:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-13 17:47:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:47:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2019-10-13 17:47:56,623 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 45 [2019-10-13 17:47:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:56,623 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2019-10-13 17:47:56,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:47:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2019-10-13 17:47:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 17:47:56,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:56,624 INFO L380 BasicCegarLoop]: trace histogram [13, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:56,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:56,825 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1104724570, now seen corresponding path program 6 times [2019-10-13 17:47:56,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:56,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64987731] [2019-10-13 17:47:56,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:56,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:56,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:47:56,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64987731] [2019-10-13 17:47:56,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070750613] [2019-10-13 17:47:56,981 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:57,042 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-13 17:47:57,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:57,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-13 17:47:57,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:57,051 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:47:57,052 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:57,058 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:57,058 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:57,059 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-13 17:47:57,102 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-10-13 17:47:57,102 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:57,118 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:57,118 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:57,118 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-10-13 17:47:59,181 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#src~0.base_BEFORE_CALL_2| Int) (|v_main_~#dst~0.base_BEFORE_CALL_1| Int)) (and (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_2|) 4) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_1|) 4)) (not (= |v_main_~#src~0.base_BEFORE_CALL_2| |v_main_~#dst~0.base_BEFORE_CALL_1|)))) is different from true [2019-10-13 17:48:01,240 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2019-10-13 17:48:03,271 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 18 [2019-10-13 17:48:03,333 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-13 17:48:03,334 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:03,337 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:03,337 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:03,337 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-13 17:48:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 1 not checked. [2019-10-13 17:48:05,402 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:05,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2019-10-13 17:48:05,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558215095] [2019-10-13 17:48:05,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:48:05,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:48:05,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=556, Unknown=2, NotChecked=50, Total=756 [2019-10-13 17:48:05,404 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 28 states. [2019-10-13 17:48:10,024 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-13 17:48:12,063 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-13 17:48:14,107 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2019-10-13 17:48:18,312 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-10-13 17:48:22,369 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-10-13 17:48:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:24,503 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2019-10-13 17:48:24,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:48:24,504 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2019-10-13 17:48:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:24,504 INFO L225 Difference]: With dead ends: 89 [2019-10-13 17:48:24,505 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 17:48:24,506 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=430, Invalid=1827, Unknown=3, NotChecked=92, Total=2352 [2019-10-13 17:48:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 17:48:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-13 17:48:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-13 17:48:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-10-13 17:48:24,512 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 46 [2019-10-13 17:48:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:24,512 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-10-13 17:48:24,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:48:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-10-13 17:48:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:48:24,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:24,513 INFO L380 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:24,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:24,715 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1118319116, now seen corresponding path program 7 times [2019-10-13 17:48:24,716 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:24,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435653285] [2019-10-13 17:48:24,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:24,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:24,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:48:24,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435653285] [2019-10-13 17:48:24,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946991009] [2019-10-13 17:48:24,890 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:24,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:48:24,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 17:48:25,000 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:25,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:48:25,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952179912] [2019-10-13 17:48:25,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:48:25,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:48:25,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:48:25,003 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2019-10-13 17:48:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:25,126 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2019-10-13 17:48:25,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:48:25,127 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2019-10-13 17:48:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:25,129 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:48:25,130 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 17:48:25,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:48:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 17:48:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-13 17:48:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-13 17:48:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-10-13 17:48:25,146 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 56 [2019-10-13 17:48:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:25,146 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-10-13 17:48:25,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:48:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-10-13 17:48:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 17:48:25,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:25,153 INFO L380 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:25,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:25,358 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash -427232512, now seen corresponding path program 8 times [2019-10-13 17:48:25,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:25,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526566804] [2019-10-13 17:48:25,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:25,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:25,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:48:25,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526566804] [2019-10-13 17:48:25,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866162855] [2019-10-13 17:48:25,574 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:25,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:25,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:25,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 17:48:25,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 17:48:25,678 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:25,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-13 17:48:25,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441120314] [2019-10-13 17:48:25,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:48:25,679 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:25,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:48:25,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:48:25,682 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 20 states. [2019-10-13 17:48:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:25,809 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2019-10-13 17:48:25,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:48:25,809 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2019-10-13 17:48:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:25,810 INFO L225 Difference]: With dead ends: 99 [2019-10-13 17:48:25,810 INFO L226 Difference]: Without dead ends: 61 [2019-10-13 17:48:25,811 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:48:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-13 17:48:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-13 17:48:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:48:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2019-10-13 17:48:25,817 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2019-10-13 17:48:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:25,817 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2019-10-13 17:48:25,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:48:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2019-10-13 17:48:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:48:25,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:25,819 INFO L380 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:26,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:26,027 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1094692724, now seen corresponding path program 9 times [2019-10-13 17:48:26,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:26,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985588069] [2019-10-13 17:48:26,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:26,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:26,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:48:26,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985588069] [2019-10-13 17:48:26,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613716298] [2019-10-13 17:48:26,220 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:26,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:48:26,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:26,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:48:26,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:26,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:48:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-13 17:48:26,690 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:26,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2019-10-13 17:48:26,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514194309] [2019-10-13 17:48:26,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:48:26,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:48:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:48:26,692 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 30 states. [2019-10-13 17:48:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:27,679 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2019-10-13 17:48:27,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:48:27,679 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2019-10-13 17:48:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:27,680 INFO L225 Difference]: With dead ends: 142 [2019-10-13 17:48:27,680 INFO L226 Difference]: Without dead ends: 82 [2019-10-13 17:48:27,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2019-10-13 17:48:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-13 17:48:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2019-10-13 17:48:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:48:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-13 17:48:27,688 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 58 [2019-10-13 17:48:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:27,688 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-13 17:48:27,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:48:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-13 17:48:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 17:48:27,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:27,689 INFO L380 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:27,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:27,900 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash -820595906, now seen corresponding path program 4 times [2019-10-13 17:48:27,901 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:27,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102576691] [2019-10-13 17:48:27,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:27,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:27,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:48:28,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102576691] [2019-10-13 17:48:28,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036070607] [2019-10-13 17:48:28,104 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:28,178 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:48:28,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:28,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:48:28,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:28,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:48:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-13 17:48:28,245 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:28,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6] total 25 [2019-10-13 17:48:28,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399179649] [2019-10-13 17:48:28,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:48:28,246 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:28,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:48:28,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:48:28,247 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 25 states. [2019-10-13 17:48:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:28,712 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2019-10-13 17:48:28,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:48:28,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2019-10-13 17:48:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:28,713 INFO L225 Difference]: With dead ends: 113 [2019-10-13 17:48:28,713 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 17:48:28,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=635, Invalid=1435, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 17:48:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 17:48:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-10-13 17:48:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 17:48:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2019-10-13 17:48:28,720 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2019-10-13 17:48:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:28,720 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2019-10-13 17:48:28,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:48:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2019-10-13 17:48:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:48:28,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:28,721 INFO L380 BasicCegarLoop]: trace histogram [18, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:28,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:28,925 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash 934276045, now seen corresponding path program 10 times [2019-10-13 17:48:28,925 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:28,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374422295] [2019-10-13 17:48:28,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:28,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:28,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:48:29,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374422295] [2019-10-13 17:48:29,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292985070] [2019-10-13 17:48:29,153 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:29,246 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:48:29,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:29,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:48:29,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 17:48:29,279 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:29,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-13 17:48:29,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540177381] [2019-10-13 17:48:29,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:48:29,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:29,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:48:29,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:48:29,280 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 23 states. [2019-10-13 17:48:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:29,337 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2019-10-13 17:48:29,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:48:29,339 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2019-10-13 17:48:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:29,340 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:48:29,340 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:48:29,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:48:29,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:48:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-13 17:48:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 17:48:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-10-13 17:48:29,345 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 63 [2019-10-13 17:48:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:29,345 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-10-13 17:48:29,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:48:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-10-13 17:48:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 17:48:29,346 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:29,346 INFO L380 BasicCegarLoop]: trace histogram [19, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:29,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:29,555 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:29,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1544941657, now seen corresponding path program 11 times [2019-10-13 17:48:29,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:29,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677102431] [2019-10-13 17:48:29,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:29,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:29,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:48:29,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677102431] [2019-10-13 17:48:29,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287690466] [2019-10-13 17:48:29,823 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:30,231 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-13 17:48:30,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:30,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:48:30,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 17:48:30,250 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:30,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:48:30,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848542836] [2019-10-13 17:48:30,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:48:30,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:48:30,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:48:30,257 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2019-10-13 17:48:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:30,375 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2019-10-13 17:48:30,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:48:30,376 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2019-10-13 17:48:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:30,377 INFO L225 Difference]: With dead ends: 109 [2019-10-13 17:48:30,377 INFO L226 Difference]: Without dead ends: 68 [2019-10-13 17:48:30,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:48:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-13 17:48:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-13 17:48:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-13 17:48:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2019-10-13 17:48:30,383 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 64 [2019-10-13 17:48:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:30,383 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2019-10-13 17:48:30,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:48:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2019-10-13 17:48:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 17:48:30,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:30,384 INFO L380 BasicCegarLoop]: trace histogram [20, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:30,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:30,593 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:30,593 INFO L82 PathProgramCache]: Analyzing trace with hash -999260851, now seen corresponding path program 12 times [2019-10-13 17:48:30,594 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:30,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362196054] [2019-10-13 17:48:30,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:30,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:30,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:48:30,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362196054] [2019-10-13 17:48:30,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900605380] [2019-10-13 17:48:30,868 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:31,131 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:48:31,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:31,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-13 17:48:31,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:31,141 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:48:31,142 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:31,146 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:31,147 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:31,147 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-13 17:48:31,213 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-10-13 17:48:31,214 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:31,221 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:31,221 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:31,221 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-10-13 17:48:33,282 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#src~0.base_BEFORE_CALL_5| Int) (|v_main_~#dst~0.base_BEFORE_CALL_2| Int)) (and (not (= |v_main_~#src~0.base_BEFORE_CALL_5| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_5|) 8) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_2|) 8)))) is different from true [2019-10-13 17:48:35,351 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#src~0.base_BEFORE_CALL_6| Int) (|v_main_~#dst~0.base_BEFORE_CALL_3| Int)) (and (= (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_3|) 8) (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_6|) 8)) (not (= |v_main_~#src~0.base_BEFORE_CALL_6| |v_main_~#dst~0.base_BEFORE_CALL_3|)))) is different from true