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/reducercommutativity/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:43:10,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:43:10,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:43:10,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:43:10,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:43:10,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:43:10,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:43:10,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:43:10,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:43:10,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:43:10,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:43:10,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:43:10,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:43:10,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:43:10,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:43:10,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:43:10,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:43:10,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:43:10,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:43:10,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:43:10,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:43:10,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:43:10,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:43:10,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:43:10,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:43:10,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:43:10,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:43:10,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:43:10,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:43:10,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:43:10,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:43:10,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:43:10,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:43:10,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:43:10,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:43:10,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:43:10,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:43:10,258 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:43:10,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:43:10,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:43:10,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:43:10,260 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:43:10,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:43:10,261 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:43:10,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:43:10,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:43:10,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:43:10,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:43:10,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:43:10,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:43:10,262 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:43:10,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:43:10,262 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:43:10,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:43:10,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:43:10,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:43:10,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:43:10,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:43:10,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:43:10,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:43:10,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:43:10,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:43:10,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:43:10,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:43:10,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:43:10,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:43:10,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:43:10,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:43:10,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:43:10,559 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:43:10,560 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:43:10,560 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-10-14 23:43:10,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c49414b1/8b268890683148dab5dd27e97de3c385/FLAG9f6a65a90 [2019-10-14 23:43:11,119 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:43:11,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-10-14 23:43:11,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c49414b1/8b268890683148dab5dd27e97de3c385/FLAG9f6a65a90 [2019-10-14 23:43:11,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c49414b1/8b268890683148dab5dd27e97de3c385 [2019-10-14 23:43:11,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:43:11,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:43:11,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:11,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:43:11,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:43:11,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db268e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11, skipping insertion in model container [2019-10-14 23:43:11,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,564 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:43:11,583 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:43:11,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:11,801 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:43:11,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:11,914 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:43:11,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11 WrapperNode [2019-10-14 23:43:11,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:11,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:43:11,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:43:11,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:43:11,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:43:11,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:43:11,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:43:11,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:43:11,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:43:12,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:43:12,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:43:12,015 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-14 23:43:12,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:43:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:43:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:43:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-14 23:43:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:43:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:43:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:43:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:43:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:43:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:43:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:43:12,312 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:43:12,312 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:43:12,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:12 BoogieIcfgContainer [2019-10-14 23:43:12,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:43:12,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:43:12,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:43:12,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:43:12,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:43:11" (1/3) ... [2019-10-14 23:43:12,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1469b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:12, skipping insertion in model container [2019-10-14 23:43:12,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11" (2/3) ... [2019-10-14 23:43:12,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1469b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:12, skipping insertion in model container [2019-10-14 23:43:12,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:12" (3/3) ... [2019-10-14 23:43:12,325 INFO L109 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2019-10-14 23:43:12,345 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:43:12,362 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:43:12,390 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:43:12,416 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:43:12,417 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:43:12,417 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:43:12,417 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:43:12,417 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:43:12,417 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:43:12,417 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:43:12,417 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:43:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 23:43:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:43:12,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:12,442 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:12,443 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:12,448 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-10-14 23:43:12,454 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:12,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871787113] [2019-10-14 23:43:12,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:43:12,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871787113] [2019-10-14 23:43:12,647 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:12,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:43:12,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898492286] [2019-10-14 23:43:12,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:12,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:12,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:12,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:43:12,668 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 23:43:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:12,796 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-14 23:43:12,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:12,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:43:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:12,810 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:43:12,810 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:43:12,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:43:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:43:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:43:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:43:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 23:43:12,862 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-10-14 23:43:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:12,863 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 23:43:12,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 23:43:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:43:12,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:12,866 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:12,866 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:12,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-10-14 23:43:12,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:12,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988950254] [2019-10-14 23:43:12,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:43:13,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988950254] [2019-10-14 23:43:13,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520323485] [2019-10-14 23:43:13,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:43:13,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:43:13,208 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:13,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 23:43:13,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327296673] [2019-10-14 23:43:13,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:13,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:13,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:13,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:13,211 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-14 23:43:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:13,231 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-14 23:43:13,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:13,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:43:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:13,234 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:43:13,235 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:43:13,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:43:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:43:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:43:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 23:43:13,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-10-14 23:43:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:13,255 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 23:43:13,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 23:43:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:43:13,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:13,256 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:13,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,469 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-10-14 23:43:13,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:13,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961086417] [2019-10-14 23:43:13,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:43:13,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961086417] [2019-10-14 23:43:13,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17282683] [2019-10-14 23:43:13,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:43:13,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:43:13,712 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:13,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:43:13,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295162183] [2019-10-14 23:43:13,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:13,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:13,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:13,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:13,716 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-14 23:43:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:13,734 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-10-14 23:43:13,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:13,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:43:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:13,736 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:43:13,736 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:43:13,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:43:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-14 23:43:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:43:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:43:13,744 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-10-14 23:43:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:13,744 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:43:13,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:43:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:43:13,746 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:13,746 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:13,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,951 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-10-14 23:43:13,952 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:13,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788968733] [2019-10-14 23:43:13,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:14,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788968733] [2019-10-14 23:43:14,073 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:14,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:43:14,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366369363] [2019-10-14 23:43:14,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:43:14,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:14,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:43:14,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:14,075 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2019-10-14 23:43:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:14,160 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-14 23:43:14,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:43:14,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-14 23:43:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:14,162 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:43:14,162 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:43:14,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:43:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 23:43:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:43:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:43:14,169 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-10-14 23:43:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:14,171 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:43:14,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:43:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:43:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:43:14,173 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:14,173 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:14,173 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:14,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-10-14 23:43:14,174 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:14,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961353297] [2019-10-14 23:43:14,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:14,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961353297] [2019-10-14 23:43:14,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033406753] [2019-10-14 23:43:14,324 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 [2019-10-14 23:43:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:14,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:14,407 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:14,407 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:43:14,408 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901214745] [2019-10-14 23:43:14,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:43:14,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:14,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:43:14,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:14,409 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-10-14 23:43:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:14,516 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-10-14 23:43:14,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:43:14,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-10-14 23:43:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:14,522 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:43:14,523 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:43:14,523 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:43:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 23:43:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:43:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-14 23:43:14,533 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-10-14 23:43:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:14,534 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-14 23:43:14,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:43:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-14 23:43:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:43:14,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:14,537 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:14,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:14,738 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-10-14 23:43:14,739 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:14,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624595368] [2019-10-14 23:43:14,739 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,739 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:14,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624595368] [2019-10-14 23:43:14,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865301501] [2019-10-14 23:43:14,887 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 [2019-10-14 23:43:14,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:14,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:14,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:14,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:14,970 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:14,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:43:14,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108678560] [2019-10-14 23:43:14,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:43:14,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:43:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:14,974 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-10-14 23:43:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:15,061 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:43:15,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:43:15,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 23:43:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:15,062 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:43:15,062 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:43:15,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:43:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 23:43:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:43:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-14 23:43:15,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2019-10-14 23:43:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:15,071 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-14 23:43:15,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:43:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-14 23:43:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:43:15,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:15,075 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:15,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,277 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1005160965, now seen corresponding path program 3 times [2019-10-14 23:43:15,278 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:15,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239671490] [2019-10-14 23:43:15,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:15,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239671490] [2019-10-14 23:43:15,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052734974] [2019-10-14 23:43:15,407 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 [2019-10-14 23:43:15,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:43:15,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:15,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:15,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:43:15,525 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:15,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:43:15,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158497108] [2019-10-14 23:43:15,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:15,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:15,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:15,527 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2019-10-14 23:43:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:15,713 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-10-14 23:43:15,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:43:15,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-14 23:43:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:15,714 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:43:15,714 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:43:15,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:43:15,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-10-14 23:43:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:43:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 23:43:15,726 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 49 [2019-10-14 23:43:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:15,726 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 23:43:15,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 23:43:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 23:43:15,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:15,730 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:15,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,935 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 742022364, now seen corresponding path program 4 times [2019-10-14 23:43:15,935 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:15,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004531119] [2019-10-14 23:43:15,936 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,936 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:16,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004531119] [2019-10-14 23:43:16,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617165096] [2019-10-14 23:43:16,067 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:16,144 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:16,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:16,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:16,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:16,195 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:16,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:43:16,198 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479989135] [2019-10-14 23:43:16,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:16,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:16,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:16,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:16,199 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2019-10-14 23:43:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:16,315 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-10-14 23:43:16,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:43:16,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2019-10-14 23:43:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:16,317 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:43:16,317 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:43:16,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:43:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 23:43:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:43:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 23:43:16,331 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 60 [2019-10-14 23:43:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:16,331 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 23:43:16,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 23:43:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 23:43:16,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:16,333 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:16,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:16,533 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1389751938, now seen corresponding path program 5 times [2019-10-14 23:43:16,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:16,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828874716] [2019-10-14 23:43:16,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:16,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828874716] [2019-10-14 23:43:16,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405770346] [2019-10-14 23:43:16,666 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:16,761 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:43:16,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:16,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:16,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 23:43:16,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:16,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 23:43:16,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409611174] [2019-10-14 23:43:16,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:16,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:16,852 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2019-10-14 23:43:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:17,060 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2019-10-14 23:43:17,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:17,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2019-10-14 23:43:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:17,062 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:43:17,062 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:43:17,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:43:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-10-14 23:43:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:43:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-10-14 23:43:17,078 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 62 [2019-10-14 23:43:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:17,079 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-10-14 23:43:17,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-10-14 23:43:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 23:43:17,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:17,081 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:17,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:17,287 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1972208203, now seen corresponding path program 6 times [2019-10-14 23:43:17,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:17,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418348312] [2019-10-14 23:43:17,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-14 23:43:17,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418348312] [2019-10-14 23:43:17,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679790059] [2019-10-14 23:43:17,442 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:17,513 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:43:17,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:17,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:17,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-14 23:43:17,552 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:17,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 23:43:17,553 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464610415] [2019-10-14 23:43:17,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:17,554 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:17,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:17,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:17,555 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2019-10-14 23:43:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:17,715 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2019-10-14 23:43:17,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:17,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-10-14 23:43:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:17,717 INFO L225 Difference]: With dead ends: 79 [2019-10-14 23:43:17,717 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:43:17,719 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:43:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-10-14 23:43:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 23:43:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2019-10-14 23:43:17,728 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 73 [2019-10-14 23:43:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:17,729 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2019-10-14 23:43:17,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2019-10-14 23:43:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 23:43:17,734 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:17,734 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:17,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:17,935 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:17,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1857138133, now seen corresponding path program 7 times [2019-10-14 23:43:17,936 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:17,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52965263] [2019-10-14 23:43:17,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:18,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52965263] [2019-10-14 23:43:18,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781055873] [2019-10-14 23:43:18,086 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:18,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:18,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:18,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:43:18,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427120810] [2019-10-14 23:43:18,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:18,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:18,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:18,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:18,191 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2019-10-14 23:43:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:18,325 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2019-10-14 23:43:18,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:18,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2019-10-14 23:43:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:18,327 INFO L225 Difference]: With dead ends: 82 [2019-10-14 23:43:18,327 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:43:18,328 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:43:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-14 23:43:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 23:43:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2019-10-14 23:43:18,334 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 77 [2019-10-14 23:43:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:18,334 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2019-10-14 23:43:18,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2019-10-14 23:43:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 23:43:18,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:18,336 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:18,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:18,540 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:18,540 INFO L82 PathProgramCache]: Analyzing trace with hash 15831411, now seen corresponding path program 8 times [2019-10-14 23:43:18,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:18,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625328605] [2019-10-14 23:43:18,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:18,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:18,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:18,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625328605] [2019-10-14 23:43:18,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992465171] [2019-10-14 23:43:18,673 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 [2019-10-14 23:43:18,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:18,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:18,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:18,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:18,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:18,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:43:18,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886910432] [2019-10-14 23:43:18,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:18,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:18,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:18,793 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 13 states. [2019-10-14 23:43:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:18,947 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2019-10-14 23:43:18,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:18,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-10-14 23:43:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:18,949 INFO L225 Difference]: With dead ends: 84 [2019-10-14 23:43:18,949 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:43:18,950 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:43:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 23:43:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:43:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-10-14 23:43:18,961 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 79 [2019-10-14 23:43:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:18,961 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-10-14 23:43:18,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-10-14 23:43:18,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 23:43:18,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:18,964 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:19,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:19,164 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash 46597521, now seen corresponding path program 9 times [2019-10-14 23:43:19,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:19,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968425434] [2019-10-14 23:43:19,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:19,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968425434] [2019-10-14 23:43:19,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212870228] [2019-10-14 23:43:19,307 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 [2019-10-14 23:43:19,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:43:19,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:19,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:19,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 74 proven. 12 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-14 23:43:19,442 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:19,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-14 23:43:19,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507033447] [2019-10-14 23:43:19,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:43:19,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:43:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:43:19,444 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 17 states. [2019-10-14 23:43:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:19,679 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2019-10-14 23:43:19,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:19,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2019-10-14 23:43:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:19,680 INFO L225 Difference]: With dead ends: 91 [2019-10-14 23:43:19,680 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:43:19,681 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:43:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-10-14 23:43:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:43:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-10-14 23:43:19,687 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 81 [2019-10-14 23:43:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:19,687 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-10-14 23:43:19,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:43:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-10-14 23:43:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-14 23:43:19,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:19,689 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:19,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:19,890 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash -313307898, now seen corresponding path program 10 times [2019-10-14 23:43:19,891 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:19,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582957043] [2019-10-14 23:43:19,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:20,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582957043] [2019-10-14 23:43:20,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373726867] [2019-10-14 23:43:20,058 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 [2019-10-14 23:43:20,134 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:20,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:20,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:43:20,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:20,156 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:20,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:43:20,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830476296] [2019-10-14 23:43:20,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:43:20,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:20,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:43:20,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:20,158 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 15 states. [2019-10-14 23:43:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:20,299 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-10-14 23:43:20,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:43:20,299 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 92 [2019-10-14 23:43:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:20,300 INFO L225 Difference]: With dead ends: 94 [2019-10-14 23:43:20,300 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:43:20,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:20,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:43:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-14 23:43:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:43:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-10-14 23:43:20,307 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 92 [2019-10-14 23:43:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:20,307 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-10-14 23:43:20,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:43:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-10-14 23:43:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:43:20,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:20,308 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:20,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:20,511 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1157101992, now seen corresponding path program 11 times [2019-10-14 23:43:20,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:20,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886363185] [2019-10-14 23:43:20,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:20,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:20,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:20,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886363185] [2019-10-14 23:43:20,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680178013] [2019-10-14 23:43:20,682 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 [2019-10-14 23:43:20,851 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 23:43:20,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:20,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:20,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2019-10-14 23:43:20,945 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:20,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-10-14 23:43:20,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31354465] [2019-10-14 23:43:20,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:43:20,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:43:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:43:20,947 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 20 states. [2019-10-14 23:43:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:21,225 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2019-10-14 23:43:21,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:21,226 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2019-10-14 23:43:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:21,227 INFO L225 Difference]: With dead ends: 101 [2019-10-14 23:43:21,227 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:43:21,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:43:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-14 23:43:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 23:43:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2019-10-14 23:43:21,234 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 94 [2019-10-14 23:43:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:21,234 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2019-10-14 23:43:21,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:43:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2019-10-14 23:43:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 23:43:21,235 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:21,236 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:21,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:21,440 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash -135209269, now seen corresponding path program 12 times [2019-10-14 23:43:21,441 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:21,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807190833] [2019-10-14 23:43:21,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-14 23:43:21,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807190833] [2019-10-14 23:43:21,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953470289] [2019-10-14 23:43:21,628 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 [2019-10-14 23:43:21,736 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:43:21,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:21,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:21,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2019-10-14 23:43:21,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:21,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2019-10-14 23:43:21,782 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970959183] [2019-10-14 23:43:21,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:21,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:21,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:21,783 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 19 states. [2019-10-14 23:43:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:21,978 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2019-10-14 23:43:21,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:43:21,978 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 105 [2019-10-14 23:43:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:21,979 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:43:21,979 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:43:21,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:43:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-14 23:43:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 23:43:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-10-14 23:43:21,987 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 105 [2019-10-14 23:43:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:21,988 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-10-14 23:43:21,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-10-14 23:43:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:43:21,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:21,989 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:22,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:22,190 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash -929187861, now seen corresponding path program 13 times [2019-10-14 23:43:22,192 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:22,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651396429] [2019-10-14 23:43:22,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:22,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651396429] [2019-10-14 23:43:22,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556926600] [2019-10-14 23:43:22,443 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 [2019-10-14 23:43:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:43:22,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:22,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:22,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:43:22,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015613851] [2019-10-14 23:43:22,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:43:22,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:43:22,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:22,564 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 18 states. [2019-10-14 23:43:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:22,722 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-10-14 23:43:22,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:22,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2019-10-14 23:43:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:22,724 INFO L225 Difference]: With dead ends: 110 [2019-10-14 23:43:22,724 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:43:22,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:43:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 23:43:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 23:43:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-10-14 23:43:22,731 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 109 [2019-10-14 23:43:22,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:22,731 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-10-14 23:43:22,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:43:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-10-14 23:43:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 23:43:22,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:22,733 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:22,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:22,946 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1783127159, now seen corresponding path program 14 times [2019-10-14 23:43:22,947 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:22,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962105006] [2019-10-14 23:43:22,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:23,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962105006] [2019-10-14 23:43:23,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716362829] [2019-10-14 23:43:23,185 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 [2019-10-14 23:43:23,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:23,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:23,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:43:23,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:23,303 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:23,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:43:23,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369438713] [2019-10-14 23:43:23,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:23,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:23,305 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 19 states. [2019-10-14 23:43:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:23,481 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2019-10-14 23:43:23,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:43:23,482 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2019-10-14 23:43:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:23,482 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:43:23,483 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:43:23,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:43:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-14 23:43:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 23:43:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-10-14 23:43:23,489 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 111 [2019-10-14 23:43:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:23,489 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-10-14 23:43:23,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-10-14 23:43:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:43:23,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:23,490 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:23,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:23,694 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:23,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:23,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2080039001, now seen corresponding path program 15 times [2019-10-14 23:43:23,695 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:23,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848961109] [2019-10-14 23:43:23,695 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,695 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:23,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848961109] [2019-10-14 23:43:23,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053541191] [2019-10-14 23:43:23,940 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 [2019-10-14 23:43:24,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 23:43:24,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:24,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:24,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-10-14 23:43:24,093 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:24,093 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6] total 23 [2019-10-14 23:43:24,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099767365] [2019-10-14 23:43:24,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:43:24,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:43:24,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:24,096 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 23 states. [2019-10-14 23:43:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:24,314 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2019-10-14 23:43:24,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:43:24,314 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 113 [2019-10-14 23:43:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:24,315 INFO L225 Difference]: With dead ends: 117 [2019-10-14 23:43:24,315 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:43:24,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:43:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-10-14 23:43:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 23:43:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2019-10-14 23:43:24,321 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 113 [2019-10-14 23:43:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:24,322 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2019-10-14 23:43:24,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:43:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2019-10-14 23:43:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-14 23:43:24,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:24,323 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:24,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:24,528 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:24,529 INFO L82 PathProgramCache]: Analyzing trace with hash -901827641, now seen corresponding path program 16 times [2019-10-14 23:43:24,529 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:24,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410192014] [2019-10-14 23:43:24,529 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:24,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410192014] [2019-10-14 23:43:24,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242676131] [2019-10-14 23:43:24,900 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 [2019-10-14 23:43:25,036 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:25,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:25,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:43:25,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:25,083 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:25,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:43:25,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816563611] [2019-10-14 23:43:25,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:43:25,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:43:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:25,086 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 21 states. [2019-10-14 23:43:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:25,301 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2019-10-14 23:43:25,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:25,301 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 117 [2019-10-14 23:43:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:25,302 INFO L225 Difference]: With dead ends: 120 [2019-10-14 23:43:25,302 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 23:43:25,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 23:43:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-10-14 23:43:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 23:43:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2019-10-14 23:43:25,308 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 117 [2019-10-14 23:43:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:25,309 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2019-10-14 23:43:25,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:43:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2019-10-14 23:43:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:43:25,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:25,310 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:25,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:25,517 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1032150683, now seen corresponding path program 17 times [2019-10-14 23:43:25,517 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:25,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982424303] [2019-10-14 23:43:25,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:25,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982424303] [2019-10-14 23:43:25,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378151723] [2019-10-14 23:43:25,770 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 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 [2019-10-14 23:43:26,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 23:43:26,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:26,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:26,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 174 proven. 35 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-10-14 23:43:26,798 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:26,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-10-14 23:43:26,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437597883] [2019-10-14 23:43:26,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:43:26,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:43:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:26,800 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 27 states. [2019-10-14 23:43:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:27,228 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2019-10-14 23:43:27,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:43:27,232 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 119 [2019-10-14 23:43:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:27,233 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:43:27,236 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 23:43:27,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 23:43:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2019-10-14 23:43:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:43:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2019-10-14 23:43:27,247 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 119 [2019-10-14 23:43:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:27,248 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2019-10-14 23:43:27,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:43:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2019-10-14 23:43:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:43:27,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:27,249 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:27,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:27,463 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash -576331982, now seen corresponding path program 18 times [2019-10-14 23:43:27,463 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:27,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738197113] [2019-10-14 23:43:27,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:27,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:27,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-14 23:43:27,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738197113] [2019-10-14 23:43:27,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006220553] [2019-10-14 23:43:27,763 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 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 [2019-10-14 23:43:28,085 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 23:43:28,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:28,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:28,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 250 proven. 16 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2019-10-14 23:43:28,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:28,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-10-14 23:43:28,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716352322] [2019-10-14 23:43:28,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:43:28,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:43:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:28,231 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 27 states. [2019-10-14 23:43:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:28,520 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2019-10-14 23:43:28,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:43:28,522 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2019-10-14 23:43:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:28,523 INFO L225 Difference]: With dead ends: 133 [2019-10-14 23:43:28,523 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 23:43:28,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 23:43:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-10-14 23:43:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 23:43:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2019-10-14 23:43:28,536 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 130 [2019-10-14 23:43:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:28,538 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2019-10-14 23:43:28,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:43:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2019-10-14 23:43:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:43:28,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:28,540 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:28,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:28,741 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:28,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2079637010, now seen corresponding path program 19 times [2019-10-14 23:43:28,742 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:28,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832306076] [2019-10-14 23:43:28,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:28,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:28,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:29,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832306076] [2019-10-14 23:43:29,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468089711] [2019-10-14 23:43:29,161 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 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 [2019-10-14 23:43:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:43:29,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:29,306 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:29,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:43:29,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227273090] [2019-10-14 23:43:29,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:43:29,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:29,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:43:29,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:29,310 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 24 states. [2019-10-14 23:43:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:29,533 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2019-10-14 23:43:29,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:43:29,534 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 134 [2019-10-14 23:43:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:29,534 INFO L225 Difference]: With dead ends: 136 [2019-10-14 23:43:29,534 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 23:43:29,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 23:43:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 23:43:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:43:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-10-14 23:43:29,539 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-10-14 23:43:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:29,540 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-10-14 23:43:29,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:43:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-10-14 23:43:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:43:29,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:29,546 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:29,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:29,747 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash 275415092, now seen corresponding path program 20 times [2019-10-14 23:43:29,748 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:29,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331530383] [2019-10-14 23:43:29,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:29,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:29,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:30,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331530383] [2019-10-14 23:43:30,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646200651] [2019-10-14 23:43:30,050 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:30,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:30,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:30,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:43:30,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:30,219 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:30,219 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 23:43:30,220 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009209361] [2019-10-14 23:43:30,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:43:30,221 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:43:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:30,222 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 25 states. [2019-10-14 23:43:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:30,403 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2019-10-14 23:43:30,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:43:30,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2019-10-14 23:43:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:30,404 INFO L225 Difference]: With dead ends: 138 [2019-10-14 23:43:30,404 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 23:43:30,405 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:30,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 23:43:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-14 23:43:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 23:43:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2019-10-14 23:43:30,410 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 136 [2019-10-14 23:43:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:30,411 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2019-10-14 23:43:30,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:43:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2019-10-14 23:43:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-14 23:43:30,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:30,412 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:30,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:30,613 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1584939478, now seen corresponding path program 21 times [2019-10-14 23:43:30,613 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:30,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418981556] [2019-10-14 23:43:30,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:30,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:30,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:30,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418981556] [2019-10-14 23:43:30,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153117958] [2019-10-14 23:43:30,956 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:31,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 23:43:31,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:31,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:31,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 248 proven. 51 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2019-10-14 23:43:31,214 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:31,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-10-14 23:43:31,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009275809] [2019-10-14 23:43:31,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:43:31,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:31,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:43:31,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:43:31,216 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 32 states. [2019-10-14 23:43:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:31,703 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2019-10-14 23:43:31,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:43:31,704 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 138 [2019-10-14 23:43:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:31,705 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:43:31,705 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 23:43:31,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:43:31,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 23:43:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-10-14 23:43:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 23:43:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2019-10-14 23:43:31,712 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 138 [2019-10-14 23:43:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:31,713 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2019-10-14 23:43:31,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:43:31,713 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2019-10-14 23:43:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:43:31,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:31,714 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:31,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:31,918 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1061708125, now seen corresponding path program 22 times [2019-10-14 23:43:31,919 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:31,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433687472] [2019-10-14 23:43:31,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:31,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:31,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-10-14 23:43:32,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433687472] [2019-10-14 23:43:32,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594336425] [2019-10-14 23:43:32,317 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:32,448 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:32,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:32,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:32,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 330 proven. 70 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2019-10-14 23:43:32,613 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:32,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2019-10-14 23:43:32,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291900533] [2019-10-14 23:43:32,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:43:32,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:32,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:43:32,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:43:32,615 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 34 states. [2019-10-14 23:43:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:33,137 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2019-10-14 23:43:33,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:43:33,138 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2019-10-14 23:43:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:33,138 INFO L225 Difference]: With dead ends: 153 [2019-10-14 23:43:33,139 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:43:33,139 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1288, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:43:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:43:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2019-10-14 23:43:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 23:43:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2019-10-14 23:43:33,144 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 149 [2019-10-14 23:43:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:33,144 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2019-10-14 23:43:33,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:43:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2019-10-14 23:43:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:43:33,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:33,145 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:33,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:33,346 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:33,347 INFO L82 PathProgramCache]: Analyzing trace with hash 789597626, now seen corresponding path program 23 times [2019-10-14 23:43:33,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:33,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953263305] [2019-10-14 23:43:33,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:33,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:33,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2019-10-14 23:43:33,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953263305] [2019-10-14 23:43:33,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339367746] [2019-10-14 23:43:33,834 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:37,649 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 23:43:37,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:37,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:37,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2019-10-14 23:43:37,854 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:37,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11] total 36 [2019-10-14 23:43:37,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100808787] [2019-10-14 23:43:37,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:43:37,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:37,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:43:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=879, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:43:37,856 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 36 states. [2019-10-14 23:43:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:38,372 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2019-10-14 23:43:38,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 23:43:38,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 160 [2019-10-14 23:43:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:38,374 INFO L225 Difference]: With dead ends: 161 [2019-10-14 23:43:38,375 INFO L226 Difference]: Without dead ends: 111 [2019-10-14 23:43:38,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2019-10-14 23:43:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-14 23:43:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2019-10-14 23:43:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-14 23:43:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2019-10-14 23:43:38,382 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 160 [2019-10-14 23:43:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:38,382 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2019-10-14 23:43:38,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:43:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2019-10-14 23:43:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:43:38,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:38,384 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 24, 24, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:38,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:38,592 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash -617570183, now seen corresponding path program 24 times [2019-10-14 23:43:38,593 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:38,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320482827] [2019-10-14 23:43:38,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:38,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:38,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2019-10-14 23:43:39,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320482827] [2019-10-14 23:43:39,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269275597] [2019-10-14 23:43:39,327 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:39,620 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:43:39,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:39,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:39,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 532 proven. 25 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2019-10-14 23:43:39,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:39,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8] total 34 [2019-10-14 23:43:39,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592315975] [2019-10-14 23:43:39,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:43:39,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:39,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:43:39,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:43:39,740 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand 34 states. [2019-10-14 23:43:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:40,069 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2019-10-14 23:43:40,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:43:40,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 171 [2019-10-14 23:43:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:40,070 INFO L225 Difference]: With dead ends: 167 [2019-10-14 23:43:40,071 INFO L226 Difference]: Without dead ends: 114 [2019-10-14 23:43:40,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:43:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-14 23:43:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-10-14 23:43:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 23:43:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2019-10-14 23:43:40,077 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 171 [2019-10-14 23:43:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:40,077 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2019-10-14 23:43:40,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:43:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2019-10-14 23:43:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 23:43:40,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:40,079 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 25, 25, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:40,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:40,283 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:40,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1435108249, now seen corresponding path program 25 times [2019-10-14 23:43:40,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:40,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607282643] [2019-10-14 23:43:40,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:40,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:40,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:40,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607282643] [2019-10-14 23:43:40,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046446462] [2019-10-14 23:43:40,705 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:43:40,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:40,879 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:40,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 23:43:40,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446219786] [2019-10-14 23:43:40,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:43:40,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:40,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:43:40,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:43:40,883 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 30 states. [2019-10-14 23:43:41,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:41,174 INFO L93 Difference]: Finished difference Result 170 states and 196 transitions. [2019-10-14 23:43:41,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:43:41,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 175 [2019-10-14 23:43:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:41,176 INFO L225 Difference]: With dead ends: 170 [2019-10-14 23:43:41,176 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 23:43:41,177 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:43:41,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 23:43:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-14 23:43:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-14 23:43:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2019-10-14 23:43:41,184 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 175 [2019-10-14 23:43:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:41,184 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2019-10-14 23:43:41,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:43:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2019-10-14 23:43:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-14 23:43:41,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:41,186 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:41,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:41,391 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash 912756663, now seen corresponding path program 26 times [2019-10-14 23:43:41,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:41,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811165277] [2019-10-14 23:43:41,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:41,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:41,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:42,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811165277] [2019-10-14 23:43:42,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346101927] [2019-10-14 23:43:42,030 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:42,165 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:42,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:42,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:43:42,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:42,227 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:42,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 23:43:42,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486747863] [2019-10-14 23:43:42,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:43:42,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:42,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:43:42,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:43:42,229 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 31 states. [2019-10-14 23:43:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:42,468 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2019-10-14 23:43:42,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:43:42,469 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 177 [2019-10-14 23:43:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:42,470 INFO L225 Difference]: With dead ends: 172 [2019-10-14 23:43:42,470 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 23:43:42,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:43:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 23:43:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-10-14 23:43:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-14 23:43:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2019-10-14 23:43:42,477 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 177 [2019-10-14 23:43:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:42,477 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2019-10-14 23:43:42,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:43:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2019-10-14 23:43:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-14 23:43:42,479 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:42,479 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:42,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:42,683 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1444056149, now seen corresponding path program 27 times [2019-10-14 23:43:42,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:42,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479194311] [2019-10-14 23:43:42,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:42,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:42,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:43,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479194311] [2019-10-14 23:43:43,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436240323] [2019-10-14 23:43:43,197 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:43,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 23:43:43,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:43,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:43,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 532 proven. 36 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2019-10-14 23:43:43,604 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:43,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 9] total 38 [2019-10-14 23:43:43,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462130891] [2019-10-14 23:43:43,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 23:43:43,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 23:43:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=934, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:43:43,611 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 38 states. [2019-10-14 23:43:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:43,898 INFO L93 Difference]: Finished difference Result 177 states and 204 transitions. [2019-10-14 23:43:43,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 23:43:43,899 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 179 [2019-10-14 23:43:43,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:43,900 INFO L225 Difference]: With dead ends: 177 [2019-10-14 23:43:43,900 INFO L226 Difference]: Without dead ends: 122 [2019-10-14 23:43:43,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=934, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:43:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-14 23:43:43,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2019-10-14 23:43:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-14 23:43:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2019-10-14 23:43:43,908 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 179 [2019-10-14 23:43:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:43,909 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2019-10-14 23:43:43,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 23:43:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2019-10-14 23:43:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-14 23:43:43,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:43,911 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:44,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:44,118 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2108811893, now seen corresponding path program 28 times [2019-10-14 23:43:44,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:44,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931913531] [2019-10-14 23:43:44,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:44,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:44,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2019-10-14 23:43:44,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931913531] [2019-10-14 23:43:44,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569433696] [2019-10-14 23:43:44,765 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:44,900 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:44,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:44,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:43:44,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2019-10-14 23:43:44,949 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:44,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 23:43:44,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459652135] [2019-10-14 23:43:44,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:43:44,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:44,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:43:44,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:44,951 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand 33 states. [2019-10-14 23:43:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:45,182 INFO L93 Difference]: Finished difference Result 180 states and 206 transitions. [2019-10-14 23:43:45,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:43:45,183 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 183 [2019-10-14 23:43:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:45,183 INFO L225 Difference]: With dead ends: 180 [2019-10-14 23:43:45,184 INFO L226 Difference]: Without dead ends: 123 [2019-10-14 23:43:45,185 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-14 23:43:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-10-14 23:43:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-10-14 23:43:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2019-10-14 23:43:45,195 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 183 [2019-10-14 23:43:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:45,195 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2019-10-14 23:43:45,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:43:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2019-10-14 23:43:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-14 23:43:45,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:45,197 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:45,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:45,402 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash -28804973, now seen corresponding path program 29 times [2019-10-14 23:43:45,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:45,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37320907] [2019-10-14 23:43:45,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:45,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:45,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2039 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2019-10-14 23:43:46,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37320907] [2019-10-14 23:43:46,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242865259] [2019-10-14 23:43:46,018 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true