/usr/bin/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:24:31,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:24:31,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:24:31,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-07 13:24:31,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:24:31,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:24:31,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:24:31,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:24:31,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:24:31,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:24:31,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:24:31,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:24:31,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:24:31,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:24:31,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:24:31,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:24:31,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:24:31,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:24:31,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:24:31,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:24:31,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:24:31,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:24:31,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:24:31,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:24:31,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:24:31,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:24:31,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:24:31,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:24:31,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:24:31,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:24:31,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:24:31,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:24:31,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:24:31,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:24:31,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:24:31,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:24:31,246 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:24:31,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:24:31,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:24:31,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:24:31,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:24:31,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:24:31,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:24:31,249 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:24:31,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:24:31,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:24:31,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:24:31,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:24:31,585 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:24:31,586 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-07 13:24:31,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7acece664/23099c5fe16747b599ff5db8c713b489/FLAG09752de20 [2020-07-07 13:24:32,131 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:24:32,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-07 13:24:32,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7acece664/23099c5fe16747b599ff5db8c713b489/FLAG09752de20 [2020-07-07 13:24:32,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7acece664/23099c5fe16747b599ff5db8c713b489 [2020-07-07 13:24:32,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:24:32,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:24:32,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:32,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:24:32,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:24:32,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26419898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32, skipping insertion in model container [2020-07-07 13:24:32,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:24:32,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:24:32,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:32,741 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:24:32,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:32,867 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:24:32,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32 WrapperNode [2020-07-07 13:24:32,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:32,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:24:32,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:24:32,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:24:32,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (1/1) ... [2020-07-07 13:24:32,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:24:32,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:24:32,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:24:32,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:24:32,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:24:32,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:24:32,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:24:32,970 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-07 13:24:32,970 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:24:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:24:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:24:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 13:24:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:24:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:24:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:24:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:24:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:24:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:24:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:24:33,312 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:24:33,312 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 13:24:33,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:33 BoogieIcfgContainer [2020-07-07 13:24:33,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:24:33,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:24:33,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:24:33,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:24:33,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:24:32" (1/3) ... [2020-07-07 13:24:33,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97b400f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:33, skipping insertion in model container [2020-07-07 13:24:33,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:32" (2/3) ... [2020-07-07 13:24:33,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97b400f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:33, skipping insertion in model container [2020-07-07 13:24:33,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:33" (3/3) ... [2020-07-07 13:24:33,327 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-07 13:24:33,338 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:24:33,346 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:24:33,361 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:24:33,384 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:24:33,384 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:24:33,384 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:24:33,385 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:24:33,385 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:24:33,385 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:24:33,385 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:24:33,385 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:24:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-07 13:24:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 13:24:33,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:33,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:33,416 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-07-07 13:24:33,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:33,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264871139] [2020-07-07 13:24:33,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:33,673 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:33,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264871139] [2020-07-07 13:24:33,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:33,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:24:33,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342609592] [2020-07-07 13:24:33,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:24:33,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:24:33,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:24:33,700 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-07-07 13:24:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:33,889 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-07-07 13:24:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:24:33,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-07 13:24:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:33,904 INFO L225 Difference]: With dead ends: 102 [2020-07-07 13:24:33,905 INFO L226 Difference]: Without dead ends: 53 [2020-07-07 13:24:33,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:24:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-07 13:24:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-07 13:24:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 13:24:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-07-07 13:24:33,964 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-07-07 13:24:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:33,964 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-07-07 13:24:33,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:24:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-07-07 13:24:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 13:24:33,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:33,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:33,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:24:33,968 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:33,969 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-07-07 13:24:33,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:33,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946068969] [2020-07-07 13:24:33,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:34,101 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:34,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946068969] [2020-07-07 13:24:34,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:34,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:24:34,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398378712] [2020-07-07 13:24:34,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:24:34,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:34,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:24:34,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:24:34,105 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-07-07 13:24:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:34,245 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-07-07 13:24:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:24:34,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-07-07 13:24:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:34,248 INFO L225 Difference]: With dead ends: 92 [2020-07-07 13:24:34,248 INFO L226 Difference]: Without dead ends: 62 [2020-07-07 13:24:34,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:24:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-07 13:24:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-07-07 13:24:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 13:24:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-07 13:24:34,264 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-07-07 13:24:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:34,264 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-07 13:24:34,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:24:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-07 13:24:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 13:24:34,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:34,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:34,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:24:34,268 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-07-07 13:24:34,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:34,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159940698] [2020-07-07 13:24:34,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:34,455 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:34,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159940698] [2020-07-07 13:24:34,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:34,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:24:34,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063929868] [2020-07-07 13:24:34,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:24:34,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:34,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:24:34,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:24:34,458 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-07-07 13:24:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:34,623 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-07 13:24:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:24:34,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-07-07 13:24:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:34,629 INFO L225 Difference]: With dead ends: 102 [2020-07-07 13:24:34,630 INFO L226 Difference]: Without dead ends: 72 [2020-07-07 13:24:34,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:24:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-07 13:24:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-07-07 13:24:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 13:24:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-07-07 13:24:34,652 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-07-07 13:24:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:34,653 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-07-07 13:24:34,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:24:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-07-07 13:24:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-07 13:24:34,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:34,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:34,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:24:34,657 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:34,658 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-07-07 13:24:34,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:34,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105572254] [2020-07-07 13:24:34,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:34,797 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:34,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105572254] [2020-07-07 13:24:34,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:34,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:24:34,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748435675] [2020-07-07 13:24:34,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:24:34,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:34,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:24:34,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:24:34,800 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-07-07 13:24:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:34,989 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-07-07 13:24:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:24:34,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-07-07 13:24:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:34,991 INFO L225 Difference]: With dead ends: 112 [2020-07-07 13:24:34,991 INFO L226 Difference]: Without dead ends: 82 [2020-07-07 13:24:34,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:24:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-07 13:24:35,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-07-07 13:24:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-07 13:24:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-07-07 13:24:35,008 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-07-07 13:24:35,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:35,009 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-07-07 13:24:35,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:24:35,009 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-07-07 13:24:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-07 13:24:35,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:35,011 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:35,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:24:35,011 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:35,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:35,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-07-07 13:24:35,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:35,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163875497] [2020-07-07 13:24:35,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:35,134 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:35,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163875497] [2020-07-07 13:24:35,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:35,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:24:35,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239899590] [2020-07-07 13:24:35,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:24:35,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:35,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:24:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:24:35,137 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-07-07 13:24:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:35,359 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-07-07 13:24:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:24:35,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-07 13:24:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:35,362 INFO L225 Difference]: With dead ends: 122 [2020-07-07 13:24:35,362 INFO L226 Difference]: Without dead ends: 92 [2020-07-07 13:24:35,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-07-07 13:24:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-07 13:24:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-07-07 13:24:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-07 13:24:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-07-07 13:24:35,375 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-07-07 13:24:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:35,389 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-07-07 13:24:35,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:24:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-07-07 13:24:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 13:24:35,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:35,391 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:35,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:24:35,392 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-07-07 13:24:35,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:35,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324148984] [2020-07-07 13:24:35,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:35,574 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:35,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324148984] [2020-07-07 13:24:35,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:35,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 13:24:35,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634010115] [2020-07-07 13:24:35,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 13:24:35,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:35,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 13:24:35,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:24:35,580 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-07-07 13:24:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:35,853 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-07-07 13:24:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 13:24:35,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-07-07 13:24:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:35,855 INFO L225 Difference]: With dead ends: 132 [2020-07-07 13:24:35,855 INFO L226 Difference]: Without dead ends: 102 [2020-07-07 13:24:35,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:24:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-07 13:24:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-07-07 13:24:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-07 13:24:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-07-07 13:24:35,885 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-07-07 13:24:35,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:35,885 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-07-07 13:24:35,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 13:24:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-07-07 13:24:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-07 13:24:35,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:35,891 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:35,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:24:35,891 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:35,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-07-07 13:24:35,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:35,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580992401] [2020-07-07 13:24:35,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:36,143 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:36,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580992401] [2020-07-07 13:24:36,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:36,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 13:24:36,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392492048] [2020-07-07 13:24:36,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 13:24:36,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:36,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 13:24:36,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-07-07 13:24:36,146 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-07-07 13:24:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:36,448 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-07-07 13:24:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 13:24:36,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-07-07 13:24:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:36,450 INFO L225 Difference]: With dead ends: 142 [2020-07-07 13:24:36,450 INFO L226 Difference]: Without dead ends: 112 [2020-07-07 13:24:36,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-07-07 13:24:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-07 13:24:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-07-07 13:24:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-07 13:24:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-07-07 13:24:36,462 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-07-07 13:24:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:36,463 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-07-07 13:24:36,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 13:24:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-07-07 13:24:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-07 13:24:36,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:36,465 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:36,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:24:36,465 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-07-07 13:24:36,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:36,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570074322] [2020-07-07 13:24:36,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:36,651 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:36,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570074322] [2020-07-07 13:24:36,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:36,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 13:24:36,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281268244] [2020-07-07 13:24:36,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 13:24:36,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:36,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 13:24:36,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-07-07 13:24:36,654 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-07-07 13:24:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:37,007 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-07-07 13:24:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 13:24:37,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-07-07 13:24:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:37,009 INFO L225 Difference]: With dead ends: 152 [2020-07-07 13:24:37,009 INFO L226 Difference]: Without dead ends: 122 [2020-07-07 13:24:37,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-07-07 13:24:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-07 13:24:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-07-07 13:24:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-07 13:24:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-07-07 13:24:37,025 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-07-07 13:24:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:37,026 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-07-07 13:24:37,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 13:24:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-07-07 13:24:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-07 13:24:37,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:37,028 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:37,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:24:37,028 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-07-07 13:24:37,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:37,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377565623] [2020-07-07 13:24:37,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:37,236 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:37,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377565623] [2020-07-07 13:24:37,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:37,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 13:24:37,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105010576] [2020-07-07 13:24:37,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 13:24:37,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 13:24:37,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-07-07 13:24:37,239 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-07-07 13:24:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:37,655 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-07-07 13:24:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 13:24:37,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-07-07 13:24:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:37,657 INFO L225 Difference]: With dead ends: 162 [2020-07-07 13:24:37,658 INFO L226 Difference]: Without dead ends: 132 [2020-07-07 13:24:37,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-07-07 13:24:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-07 13:24:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-07-07 13:24:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-07 13:24:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-07-07 13:24:37,683 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-07-07 13:24:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:37,689 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-07-07 13:24:37,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 13:24:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-07-07 13:24:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-07-07 13:24:37,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:37,694 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:37,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:24:37,695 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:37,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-07-07 13:24:37,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:37,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390143198] [2020-07-07 13:24:37,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:37,959 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:37,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390143198] [2020-07-07 13:24:37,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:37,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-07-07 13:24:37,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222975905] [2020-07-07 13:24:37,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 13:24:37,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:37,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 13:24:37,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:24:37,961 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-07-07 13:24:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:38,369 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-07-07 13:24:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 13:24:38,370 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-07-07 13:24:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:38,371 INFO L225 Difference]: With dead ends: 172 [2020-07-07 13:24:38,371 INFO L226 Difference]: Without dead ends: 142 [2020-07-07 13:24:38,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 13:24:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-07 13:24:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-07-07 13:24:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-07 13:24:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-07-07 13:24:38,382 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-07-07 13:24:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:38,382 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-07-07 13:24:38,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 13:24:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-07-07 13:24:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-07 13:24:38,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:38,385 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:38,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:24:38,385 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-07-07 13:24:38,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:38,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294218458] [2020-07-07 13:24:38,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:38,654 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:38,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294218458] [2020-07-07 13:24:38,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:38,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-07-07 13:24:38,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111644076] [2020-07-07 13:24:38,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 13:24:38,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 13:24:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-07-07 13:24:38,656 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-07-07 13:24:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:39,183 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-07-07 13:24:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-07 13:24:39,183 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-07-07 13:24:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:39,184 INFO L225 Difference]: With dead ends: 182 [2020-07-07 13:24:39,185 INFO L226 Difference]: Without dead ends: 152 [2020-07-07 13:24:39,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 13:24:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-07 13:24:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-07-07 13:24:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-07 13:24:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-07-07 13:24:39,200 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-07-07 13:24:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:39,201 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-07-07 13:24:39,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 13:24:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-07-07 13:24:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-07 13:24:39,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:39,203 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:39,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 13:24:39,203 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-07-07 13:24:39,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:39,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269684572] [2020-07-07 13:24:39,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:39,530 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:39,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269684572] [2020-07-07 13:24:39,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:39,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-07-07 13:24:39,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402738299] [2020-07-07 13:24:39,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 13:24:39,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:39,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 13:24:39,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-07-07 13:24:39,533 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-07-07 13:24:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:40,027 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-07-07 13:24:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-07 13:24:40,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-07-07 13:24:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:40,029 INFO L225 Difference]: With dead ends: 192 [2020-07-07 13:24:40,029 INFO L226 Difference]: Without dead ends: 162 [2020-07-07 13:24:40,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 13:24:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-07 13:24:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-07-07 13:24:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-07 13:24:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-07-07 13:24:40,041 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-07-07 13:24:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:40,042 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-07-07 13:24:40,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 13:24:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-07-07 13:24:40,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-07 13:24:40,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:40,044 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:40,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 13:24:40,044 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:40,045 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-07-07 13:24:40,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:40,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324242897] [2020-07-07 13:24:40,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:40,565 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:40,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324242897] [2020-07-07 13:24:40,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:40,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-07-07 13:24:40,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506052009] [2020-07-07 13:24:40,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 13:24:40,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:40,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 13:24:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-07-07 13:24:40,572 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-07-07 13:24:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:41,324 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-07-07 13:24:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-07 13:24:41,325 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-07-07 13:24:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:41,326 INFO L225 Difference]: With dead ends: 202 [2020-07-07 13:24:41,326 INFO L226 Difference]: Without dead ends: 172 [2020-07-07 13:24:41,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 13:24:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-07 13:24:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-07-07 13:24:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-07 13:24:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-07-07 13:24:41,344 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-07-07 13:24:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:41,344 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-07-07 13:24:41,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 13:24:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-07-07 13:24:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-07 13:24:41,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:41,346 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:41,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 13:24:41,347 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:41,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-07-07 13:24:41,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:41,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88244625] [2020-07-07 13:24:41,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:41,787 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:41,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88244625] [2020-07-07 13:24:41,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:41,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-07-07 13:24:41,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608912147] [2020-07-07 13:24:41,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 13:24:41,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:41,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 13:24:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-07-07 13:24:41,789 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-07-07 13:24:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:42,534 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-07-07 13:24:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-07 13:24:42,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-07-07 13:24:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:42,536 INFO L225 Difference]: With dead ends: 212 [2020-07-07 13:24:42,536 INFO L226 Difference]: Without dead ends: 182 [2020-07-07 13:24:42,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 13:24:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-07 13:24:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-07-07 13:24:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-07 13:24:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-07-07 13:24:42,548 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-07-07 13:24:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:42,549 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-07-07 13:24:42,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 13:24:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-07-07 13:24:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-07 13:24:42,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:42,551 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:42,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 13:24:42,551 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:42,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-07-07 13:24:42,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:42,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507086315] [2020-07-07 13:24:42,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:42,995 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:42,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507086315] [2020-07-07 13:24:42,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:42,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-07-07 13:24:42,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138447518] [2020-07-07 13:24:42,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-07 13:24:42,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:42,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-07 13:24:42,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-07-07 13:24:42,997 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-07-07 13:24:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:43,840 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-07-07 13:24:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-07 13:24:43,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-07-07 13:24:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:43,842 INFO L225 Difference]: With dead ends: 222 [2020-07-07 13:24:43,843 INFO L226 Difference]: Without dead ends: 192 [2020-07-07 13:24:43,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-07-07 13:24:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-07 13:24:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-07-07 13:24:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-07 13:24:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-07-07 13:24:43,855 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-07-07 13:24:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:43,856 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-07-07 13:24:43,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-07 13:24:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-07-07 13:24:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-07-07 13:24:43,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:43,859 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:43,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 13:24:43,859 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:43,859 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-07-07 13:24:43,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:43,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481072862] [2020-07-07 13:24:43,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:44,472 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:44,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481072862] [2020-07-07 13:24:44,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:44,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-07-07 13:24:44,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818599950] [2020-07-07 13:24:44,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-07 13:24:44,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:44,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-07 13:24:44,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-07-07 13:24:44,475 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-07-07 13:24:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:45,411 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-07-07 13:24:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-07 13:24:45,411 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-07-07 13:24:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:45,413 INFO L225 Difference]: With dead ends: 232 [2020-07-07 13:24:45,413 INFO L226 Difference]: Without dead ends: 202 [2020-07-07 13:24:45,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-07-07 13:24:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-07 13:24:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-07-07 13:24:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-07 13:24:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-07-07 13:24:45,424 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-07-07 13:24:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:45,424 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-07-07 13:24:45,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-07 13:24:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-07-07 13:24:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-07 13:24:45,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:45,427 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:45,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 13:24:45,427 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:45,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:45,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-07-07 13:24:45,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:45,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146365703] [2020-07-07 13:24:45,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:45,986 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:45,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146365703] [2020-07-07 13:24:45,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:45,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-07-07 13:24:45,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765357270] [2020-07-07 13:24:45,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-07 13:24:45,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-07 13:24:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 13:24:45,989 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-07-07 13:24:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:46,992 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-07-07 13:24:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-07 13:24:46,993 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-07-07 13:24:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:46,995 INFO L225 Difference]: With dead ends: 242 [2020-07-07 13:24:46,995 INFO L226 Difference]: Without dead ends: 212 [2020-07-07 13:24:46,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-07-07 13:24:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-07 13:24:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-07-07 13:24:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-07 13:24:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-07-07 13:24:47,005 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-07-07 13:24:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:47,006 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-07-07 13:24:47,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-07 13:24:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-07-07 13:24:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-07 13:24:47,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:47,008 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:47,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 13:24:47,009 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-07-07 13:24:47,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:47,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45461115] [2020-07-07 13:24:47,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:47,621 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:47,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45461115] [2020-07-07 13:24:47,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:47,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-07-07 13:24:47,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995679686] [2020-07-07 13:24:47,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-07 13:24:47,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-07 13:24:47,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 13:24:47,629 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-07-07 13:24:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:48,756 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-07-07 13:24:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-07 13:24:48,758 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-07-07 13:24:48,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:48,762 INFO L225 Difference]: With dead ends: 252 [2020-07-07 13:24:48,762 INFO L226 Difference]: Without dead ends: 222 [2020-07-07 13:24:48,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-07-07 13:24:48,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-07 13:24:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-07-07 13:24:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-07 13:24:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-07-07 13:24:48,774 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-07-07 13:24:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:48,775 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-07-07 13:24:48,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-07 13:24:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-07-07 13:24:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-07-07 13:24:48,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:48,778 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:48,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 13:24:48,778 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:48,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-07-07 13:24:48,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:48,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216425566] [2020-07-07 13:24:48,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:49,508 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:49,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216425566] [2020-07-07 13:24:49,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:49,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-07-07 13:24:49,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173018854] [2020-07-07 13:24:49,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-07 13:24:49,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-07 13:24:49,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 13:24:49,511 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-07-07 13:24:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:50,761 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-07-07 13:24:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-07 13:24:50,762 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-07-07 13:24:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:50,763 INFO L225 Difference]: With dead ends: 262 [2020-07-07 13:24:50,763 INFO L226 Difference]: Without dead ends: 232 [2020-07-07 13:24:50,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-07-07 13:24:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-07 13:24:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-07-07 13:24:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-07 13:24:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-07-07 13:24:50,774 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-07-07 13:24:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:50,775 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-07-07 13:24:50,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-07 13:24:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-07-07 13:24:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-07 13:24:50,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:50,776 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:50,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 13:24:50,777 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-07-07 13:24:50,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:50,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739427804] [2020-07-07 13:24:50,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:51,493 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:51,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739427804] [2020-07-07 13:24:51,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:51,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-07-07 13:24:51,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496864376] [2020-07-07 13:24:51,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-07 13:24:51,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-07 13:24:51,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 13:24:51,495 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 40 states. [2020-07-07 13:24:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:52,881 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-07-07 13:24:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-07 13:24:52,882 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 219 [2020-07-07 13:24:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:52,884 INFO L225 Difference]: With dead ends: 272 [2020-07-07 13:24:52,884 INFO L226 Difference]: Without dead ends: 242 [2020-07-07 13:24:52,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-07-07 13:24:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-07 13:24:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2020-07-07 13:24:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-07 13:24:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-07-07 13:24:52,895 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 219 [2020-07-07 13:24:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:52,896 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-07-07 13:24:52,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-07 13:24:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-07-07 13:24:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-07-07 13:24:52,897 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:52,898 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:52,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 13:24:52,898 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 669563575, now seen corresponding path program 19 times [2020-07-07 13:24:52,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:52,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487772851] [2020-07-07 13:24:52,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:53,735 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:53,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487772851] [2020-07-07 13:24:53,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:53,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-07-07 13:24:53,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778005265] [2020-07-07 13:24:53,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-07 13:24:53,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:53,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-07 13:24:53,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 13:24:53,738 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 42 states. [2020-07-07 13:24:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:55,110 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2020-07-07 13:24:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-07 13:24:55,111 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 229 [2020-07-07 13:24:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:55,112 INFO L225 Difference]: With dead ends: 274 [2020-07-07 13:24:55,113 INFO L226 Difference]: Without dead ends: 244 [2020-07-07 13:24:55,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-07-07 13:24:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-07-07 13:24:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-07-07 13:24:55,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-07 13:24:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2020-07-07 13:24:55,124 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 229 [2020-07-07 13:24:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:55,125 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2020-07-07 13:24:55,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-07 13:24:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2020-07-07 13:24:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-07-07 13:24:55,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:55,126 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:55,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 13:24:55,127 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1024771811, now seen corresponding path program 20 times [2020-07-07 13:24:55,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:55,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094483900] [2020-07-07 13:24:55,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:24:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:24:55,500 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:55,501 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:24:55,501 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:24:55,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 13:24:55,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:24:55 BoogieIcfgContainer [2020-07-07 13:24:55,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:24:55,563 INFO L168 Benchmark]: Toolchain (without parser) took 23051.16 ms. Allocated memory was 146.8 MB in the beginning and 443.5 MB in the end (delta: 296.7 MB). Free memory was 104.4 MB in the beginning and 102.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 299.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:55,564 INFO L168 Benchmark]: CDTParser took 0.89 ms. Allocated memory is still 146.8 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:24:55,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.21 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.2 MB in the beginning and 183.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:55,565 INFO L168 Benchmark]: Boogie Preprocessor took 37.05 ms. Allocated memory is still 203.9 MB. Free memory was 183.0 MB in the beginning and 181.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:55,566 INFO L168 Benchmark]: RCFGBuilder took 411.74 ms. Allocated memory is still 203.9 MB. Free memory was 181.1 MB in the beginning and 162.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:55,567 INFO L168 Benchmark]: TraceAbstraction took 22240.10 ms. Allocated memory was 203.9 MB in the beginning and 443.5 MB in the end (delta: 239.6 MB). Free memory was 162.1 MB in the beginning and 102.0 MB in the end (delta: 60.1 MB). Peak memory consumption was 299.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:55,573 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.89 ms. Allocated memory is still 146.8 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 357.21 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.2 MB in the beginning and 183.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.05 ms. Allocated memory is still 203.9 MB. Free memory was 183.0 MB in the beginning and 181.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.74 ms. Allocated memory is still 203.9 MB. Free memory was 181.1 MB in the beginning and 162.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22240.10 ms. Allocated memory was 203.9 MB in the beginning and 443.5 MB in the end (delta: 239.6 MB). Free memory was 162.1 MB in the beginning and 102.0 MB in the end (delta: 60.1 MB). Peak memory consumption was 299.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.1s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 13.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1023 SDtfs, 1875 SDslu, 11317 SDs, 0 SdLazy, 5156 SolverSat, 320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7391 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 152 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...