/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/ssh-simplified/s3_srvr_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:21:23,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:21:23,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:21:23,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:21:23,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:21:23,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:21:23,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:21:23,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:21:23,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:21:23,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:21:23,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:21:23,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:21:23,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:21:23,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:21:23,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:21:23,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:21:23,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:21:23,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:21:23,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:21:23,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:21:23,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:21:23,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:21:23,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:21:23,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:21:23,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:21:23,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:21:23,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:21:23,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:21:23,242 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 13:21:23,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:21:23,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:21:23,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:21:23,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:21:23,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:21:23,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:21:23,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:21:23,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:21:23,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:21:23,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:21:23,272 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:21:23,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:21:23,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:21:23,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:21:23,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:21:23,278 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:21:23,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:21:23,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:21:23,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:21:23,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:21:23,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:21:23,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:21:23,280 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:21:23,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:21:23,617 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:21:23,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:21:23,624 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:21:23,625 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:21:23,625 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-07-07 13:21:23,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8afa83c4c/a7d04f5299eb4c79a99adc1df8fc59ae/FLAGab8adf027 [2020-07-07 13:21:24,233 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:21:24,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-07-07 13:21:24,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8afa83c4c/a7d04f5299eb4c79a99adc1df8fc59ae/FLAGab8adf027 [2020-07-07 13:21:24,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8afa83c4c/a7d04f5299eb4c79a99adc1df8fc59ae [2020-07-07 13:21:24,623 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:21:24,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:21:24,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:21:24,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:21:24,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:21:24,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:21:24" (1/1) ... [2020-07-07 13:21:24,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b570901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:24, skipping insertion in model container [2020-07-07 13:21:24,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:21:24" (1/1) ... [2020-07-07 13:21:24,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:21:24,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:21:25,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:21:25,028 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:21:25,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:21:25,238 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:21:25,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25 WrapperNode [2020-07-07 13:21:25,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:21:25,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:21:25,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:21:25,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:21:25,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (1/1) ... [2020-07-07 13:21:25,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (1/1) ... [2020-07-07 13:21:25,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (1/1) ... [2020-07-07 13:21:25,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (1/1) ... [2020-07-07 13:21:25,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (1/1) ... [2020-07-07 13:21:25,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (1/1) ... [2020-07-07 13:21:25,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (1/1) ... [2020-07-07 13:21:25,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:21:25,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:21:25,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:21:25,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:21:25,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (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 13:21:25,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:21:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:21:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-07-07 13:21:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:21:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:21:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 13:21:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:21:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-07-07 13:21:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-07-07 13:21:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-07-07 13:21:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:21:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:21:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:21:25,593 WARN L775 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-07-07 13:21:26,474 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-07-07 13:21:26,474 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-07-07 13:21:26,491 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:21:26,491 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 13:21:26,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:21:26 BoogieIcfgContainer [2020-07-07 13:21:26,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:21:26,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:21:26,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:21:26,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:21:26,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:21:24" (1/3) ... [2020-07-07 13:21:26,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544233eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:21:26, skipping insertion in model container [2020-07-07 13:21:26,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:25" (2/3) ... [2020-07-07 13:21:26,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544233eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:21:26, skipping insertion in model container [2020-07-07 13:21:26,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:21:26" (3/3) ... [2020-07-07 13:21:26,509 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-07-07 13:21:26,521 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:21:26,531 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:21:26,548 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:21:26,574 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:21:26,574 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:21:26,575 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:21:26,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:21:26,575 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:21:26,590 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:21:26,590 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:21:26,590 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:21:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states. [2020-07-07 13:21:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-07 13:21:26,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:26,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:26,641 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1996743066, now seen corresponding path program 1 times [2020-07-07 13:21:26,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:26,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133434876] [2020-07-07 13:21:26,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:27,235 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 13:21:27,236 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:27,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133434876] [2020-07-07 13:21:27,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:27,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:21:27,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758918943] [2020-07-07 13:21:27,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:21:27,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:27,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:21:27,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:21:27,271 INFO L87 Difference]: Start difference. First operand 471 states. Second operand 6 states. [2020-07-07 13:21:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:27,896 INFO L93 Difference]: Finished difference Result 897 states and 1196 transitions. [2020-07-07 13:21:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:21:27,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2020-07-07 13:21:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:27,922 INFO L225 Difference]: With dead ends: 897 [2020-07-07 13:21:27,922 INFO L226 Difference]: Without dead ends: 505 [2020-07-07 13:21:27,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:21:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-07-07 13:21:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 490. [2020-07-07 13:21:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-07 13:21:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 595 transitions. [2020-07-07 13:21:28,036 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 595 transitions. Word has length 161 [2020-07-07 13:21:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:28,038 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 595 transitions. [2020-07-07 13:21:28,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:21:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 595 transitions. [2020-07-07 13:21:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-07 13:21:28,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:28,042 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:28,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:21:28,043 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:28,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1547598949, now seen corresponding path program 1 times [2020-07-07 13:21:28,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:28,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357054250] [2020-07-07 13:21:28,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:28,265 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 13:21:28,266 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:28,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357054250] [2020-07-07 13:21:28,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:28,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:21:28,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070793737] [2020-07-07 13:21:28,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:21:28,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:28,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:21:28,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:21:28,269 INFO L87 Difference]: Start difference. First operand 490 states and 595 transitions. Second operand 6 states. [2020-07-07 13:21:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:28,709 INFO L93 Difference]: Finished difference Result 937 states and 1192 transitions. [2020-07-07 13:21:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:21:28,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-07-07 13:21:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:28,714 INFO L225 Difference]: With dead ends: 937 [2020-07-07 13:21:28,714 INFO L226 Difference]: Without dead ends: 573 [2020-07-07 13:21:28,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:21:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-07-07 13:21:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 555. [2020-07-07 13:21:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-07-07 13:21:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 691 transitions. [2020-07-07 13:21:28,773 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 691 transitions. Word has length 169 [2020-07-07 13:21:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:28,773 INFO L479 AbstractCegarLoop]: Abstraction has 555 states and 691 transitions. [2020-07-07 13:21:28,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:21:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 691 transitions. [2020-07-07 13:21:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-07 13:21:28,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:28,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:28,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:21:28,778 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:28,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2044458217, now seen corresponding path program 1 times [2020-07-07 13:21:28,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:28,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711256739] [2020-07-07 13:21:28,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:28,904 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 13:21:28,904 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:28,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711256739] [2020-07-07 13:21:28,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:28,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:28,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458811937] [2020-07-07 13:21:28,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:28,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:28,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:28,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:28,907 INFO L87 Difference]: Start difference. First operand 555 states and 691 transitions. Second operand 3 states. [2020-07-07 13:21:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:29,082 INFO L93 Difference]: Finished difference Result 987 states and 1256 transitions. [2020-07-07 13:21:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:29,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2020-07-07 13:21:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:29,087 INFO L225 Difference]: With dead ends: 987 [2020-07-07 13:21:29,087 INFO L226 Difference]: Without dead ends: 571 [2020-07-07 13:21:29,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-07-07 13:21:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-07-07 13:21:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-07-07 13:21:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 707 transitions. [2020-07-07 13:21:29,136 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 707 transitions. Word has length 186 [2020-07-07 13:21:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:29,136 INFO L479 AbstractCegarLoop]: Abstraction has 571 states and 707 transitions. [2020-07-07 13:21:29,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 707 transitions. [2020-07-07 13:21:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-07-07 13:21:29,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:29,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:29,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:21:29,141 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:29,141 INFO L82 PathProgramCache]: Analyzing trace with hash 570616873, now seen corresponding path program 1 times [2020-07-07 13:21:29,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:29,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561434077] [2020-07-07 13:21:29,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:29,235 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 13:21:29,236 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:29,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561434077] [2020-07-07 13:21:29,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:29,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:29,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162030287] [2020-07-07 13:21:29,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:29,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:29,239 INFO L87 Difference]: Start difference. First operand 571 states and 707 transitions. Second operand 3 states. [2020-07-07 13:21:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:29,526 INFO L93 Difference]: Finished difference Result 1044 states and 1347 transitions. [2020-07-07 13:21:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:29,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2020-07-07 13:21:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:29,532 INFO L225 Difference]: With dead ends: 1044 [2020-07-07 13:21:29,532 INFO L226 Difference]: Without dead ends: 628 [2020-07-07 13:21:29,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-07-07 13:21:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 599. [2020-07-07 13:21:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-07-07 13:21:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 744 transitions. [2020-07-07 13:21:29,588 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 744 transitions. Word has length 187 [2020-07-07 13:21:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:29,589 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 744 transitions. [2020-07-07 13:21:29,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 744 transitions. [2020-07-07 13:21:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-07 13:21:29,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:29,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:29,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:21:29,593 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1436054601, now seen corresponding path program 1 times [2020-07-07 13:21:29,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:29,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041324511] [2020-07-07 13:21:29,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:29,709 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 13:21:29,709 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:29,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041324511] [2020-07-07 13:21:29,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:29,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:29,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115310822] [2020-07-07 13:21:29,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:29,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:29,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:29,712 INFO L87 Difference]: Start difference. First operand 599 states and 744 transitions. Second operand 3 states. [2020-07-07 13:21:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:29,990 INFO L93 Difference]: Finished difference Result 1084 states and 1380 transitions. [2020-07-07 13:21:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:29,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 195 [2020-07-07 13:21:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:29,996 INFO L225 Difference]: With dead ends: 1084 [2020-07-07 13:21:29,996 INFO L226 Difference]: Without dead ends: 615 [2020-07-07 13:21:29,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-07-07 13:21:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 613. [2020-07-07 13:21:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-07-07 13:21:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 760 transitions. [2020-07-07 13:21:30,067 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 760 transitions. Word has length 195 [2020-07-07 13:21:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:30,068 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 760 transitions. [2020-07-07 13:21:30,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 760 transitions. [2020-07-07 13:21:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-07-07 13:21:30,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:30,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:30,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:21:30,076 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1774700262, now seen corresponding path program 1 times [2020-07-07 13:21:30,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:30,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604593793] [2020-07-07 13:21:30,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:30,264 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 13:21:30,264 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:30,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604593793] [2020-07-07 13:21:30,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:30,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:30,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592768572] [2020-07-07 13:21:30,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:30,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:30,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:30,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:30,268 INFO L87 Difference]: Start difference. First operand 613 states and 760 transitions. Second operand 4 states. [2020-07-07 13:21:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:30,647 INFO L93 Difference]: Finished difference Result 1162 states and 1468 transitions. [2020-07-07 13:21:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:30,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 200 [2020-07-07 13:21:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:30,654 INFO L225 Difference]: With dead ends: 1162 [2020-07-07 13:21:30,655 INFO L226 Difference]: Without dead ends: 704 [2020-07-07 13:21:30,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-07-07 13:21:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 643. [2020-07-07 13:21:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-07-07 13:21:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 794 transitions. [2020-07-07 13:21:30,735 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 794 transitions. Word has length 200 [2020-07-07 13:21:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:30,736 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 794 transitions. [2020-07-07 13:21:30,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 794 transitions. [2020-07-07 13:21:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-07 13:21:30,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:30,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:30,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:21:30,740 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1774597616, now seen corresponding path program 1 times [2020-07-07 13:21:30,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:30,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386883877] [2020-07-07 13:21:30,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:30,878 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 13:21:30,879 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:30,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386883877] [2020-07-07 13:21:30,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:30,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:30,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697764528] [2020-07-07 13:21:30,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:30,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:30,883 INFO L87 Difference]: Start difference. First operand 643 states and 794 transitions. Second operand 4 states. [2020-07-07 13:21:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:31,308 INFO L93 Difference]: Finished difference Result 1198 states and 1507 transitions. [2020-07-07 13:21:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:31,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2020-07-07 13:21:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:31,313 INFO L225 Difference]: With dead ends: 1198 [2020-07-07 13:21:31,313 INFO L226 Difference]: Without dead ends: 710 [2020-07-07 13:21:31,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-07-07 13:21:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 635. [2020-07-07 13:21:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-07-07 13:21:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 786 transitions. [2020-07-07 13:21:31,373 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 786 transitions. Word has length 201 [2020-07-07 13:21:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:31,373 INFO L479 AbstractCegarLoop]: Abstraction has 635 states and 786 transitions. [2020-07-07 13:21:31,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 786 transitions. [2020-07-07 13:21:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-07-07 13:21:31,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:31,378 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:31,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:21:31,378 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:31,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1625465716, now seen corresponding path program 1 times [2020-07-07 13:21:31,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:31,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106284734] [2020-07-07 13:21:31,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:31,470 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 13:21:31,471 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:31,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106284734] [2020-07-07 13:21:31,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:31,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:31,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845300940] [2020-07-07 13:21:31,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:31,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:31,473 INFO L87 Difference]: Start difference. First operand 635 states and 786 transitions. Second operand 3 states. [2020-07-07 13:21:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:31,695 INFO L93 Difference]: Finished difference Result 1148 states and 1455 transitions. [2020-07-07 13:21:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:31,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2020-07-07 13:21:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:31,700 INFO L225 Difference]: With dead ends: 1148 [2020-07-07 13:21:31,700 INFO L226 Difference]: Without dead ends: 668 [2020-07-07 13:21:31,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-07-07 13:21:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 657. [2020-07-07 13:21:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-07-07 13:21:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 811 transitions. [2020-07-07 13:21:31,751 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 811 transitions. Word has length 202 [2020-07-07 13:21:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:31,752 INFO L479 AbstractCegarLoop]: Abstraction has 657 states and 811 transitions. [2020-07-07 13:21:31,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 811 transitions. [2020-07-07 13:21:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-07-07 13:21:31,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:31,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:31,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:21:31,757 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1597515948, now seen corresponding path program 1 times [2020-07-07 13:21:31,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:31,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387230207] [2020-07-07 13:21:31,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:31,877 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 13:21:31,877 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:31,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387230207] [2020-07-07 13:21:31,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:31,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:31,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785087602] [2020-07-07 13:21:31,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:31,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:31,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:31,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:31,880 INFO L87 Difference]: Start difference. First operand 657 states and 811 transitions. Second operand 3 states. [2020-07-07 13:21:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:32,132 INFO L93 Difference]: Finished difference Result 1640 states and 2094 transitions. [2020-07-07 13:21:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:32,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2020-07-07 13:21:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:32,139 INFO L225 Difference]: With dead ends: 1640 [2020-07-07 13:21:32,140 INFO L226 Difference]: Without dead ends: 1138 [2020-07-07 13:21:32,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2020-07-07 13:21:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1136. [2020-07-07 13:21:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1136 states. [2020-07-07 13:21:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1420 transitions. [2020-07-07 13:21:32,238 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1420 transitions. Word has length 210 [2020-07-07 13:21:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:32,239 INFO L479 AbstractCegarLoop]: Abstraction has 1136 states and 1420 transitions. [2020-07-07 13:21:32,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1420 transitions. [2020-07-07 13:21:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-07 13:21:32,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:32,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:32,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:21:32,244 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1924666477, now seen corresponding path program 1 times [2020-07-07 13:21:32,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:32,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102060382] [2020-07-07 13:21:32,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:32,367 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 13:21:32,367 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:32,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102060382] [2020-07-07 13:21:32,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:32,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:32,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136174739] [2020-07-07 13:21:32,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:32,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:32,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:32,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:32,371 INFO L87 Difference]: Start difference. First operand 1136 states and 1420 transitions. Second operand 4 states. [2020-07-07 13:21:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:33,153 INFO L93 Difference]: Finished difference Result 3282 states and 4260 transitions. [2020-07-07 13:21:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:33,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2020-07-07 13:21:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:33,164 INFO L225 Difference]: With dead ends: 3282 [2020-07-07 13:21:33,165 INFO L226 Difference]: Without dead ends: 2213 [2020-07-07 13:21:33,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2020-07-07 13:21:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1172. [2020-07-07 13:21:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-07-07 13:21:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1468 transitions. [2020-07-07 13:21:33,308 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1468 transitions. Word has length 213 [2020-07-07 13:21:33,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:33,308 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1468 transitions. [2020-07-07 13:21:33,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1468 transitions. [2020-07-07 13:21:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-07-07 13:21:33,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:33,317 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:33,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:21:33,318 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1074238856, now seen corresponding path program 1 times [2020-07-07 13:21:33,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:33,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845500740] [2020-07-07 13:21:33,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:33,467 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 13:21:33,467 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:33,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845500740] [2020-07-07 13:21:33,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:33,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:33,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231525798] [2020-07-07 13:21:33,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:33,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:33,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:33,471 INFO L87 Difference]: Start difference. First operand 1172 states and 1468 transitions. Second operand 3 states. [2020-07-07 13:21:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:33,837 INFO L93 Difference]: Finished difference Result 2297 states and 2945 transitions. [2020-07-07 13:21:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:33,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2020-07-07 13:21:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:33,845 INFO L225 Difference]: With dead ends: 2297 [2020-07-07 13:21:33,845 INFO L226 Difference]: Without dead ends: 1280 [2020-07-07 13:21:33,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2020-07-07 13:21:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1268. [2020-07-07 13:21:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1268 states. [2020-07-07 13:21:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1582 transitions. [2020-07-07 13:21:33,965 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1582 transitions. Word has length 230 [2020-07-07 13:21:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:33,966 INFO L479 AbstractCegarLoop]: Abstraction has 1268 states and 1582 transitions. [2020-07-07 13:21:33,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1582 transitions. [2020-07-07 13:21:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-07-07 13:21:33,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:33,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:33,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 13:21:33,972 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1305865704, now seen corresponding path program 1 times [2020-07-07 13:21:33,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:33,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702125287] [2020-07-07 13:21:33,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:34,070 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 13:21:34,070 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:34,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702125287] [2020-07-07 13:21:34,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:34,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:34,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64625951] [2020-07-07 13:21:34,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:34,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:34,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:34,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:34,073 INFO L87 Difference]: Start difference. First operand 1268 states and 1582 transitions. Second operand 3 states. [2020-07-07 13:21:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:34,457 INFO L93 Difference]: Finished difference Result 2474 states and 3125 transitions. [2020-07-07 13:21:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:34,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2020-07-07 13:21:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:34,468 INFO L225 Difference]: With dead ends: 2474 [2020-07-07 13:21:34,468 INFO L226 Difference]: Without dead ends: 1361 [2020-07-07 13:21:34,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-07-07 13:21:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1330. [2020-07-07 13:21:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1330 states. [2020-07-07 13:21:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1656 transitions. [2020-07-07 13:21:34,697 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1656 transitions. Word has length 230 [2020-07-07 13:21:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:34,698 INFO L479 AbstractCegarLoop]: Abstraction has 1330 states and 1656 transitions. [2020-07-07 13:21:34,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1656 transitions. [2020-07-07 13:21:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-07-07 13:21:34,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:34,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:34,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 13:21:34,707 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:34,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1647539560, now seen corresponding path program 1 times [2020-07-07 13:21:34,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:34,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305052082] [2020-07-07 13:21:34,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:34,855 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 13:21:34,856 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:34,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305052082] [2020-07-07 13:21:34,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:34,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:34,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634921815] [2020-07-07 13:21:34,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:34,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:34,859 INFO L87 Difference]: Start difference. First operand 1330 states and 1656 transitions. Second operand 3 states. [2020-07-07 13:21:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:35,184 INFO L93 Difference]: Finished difference Result 3083 states and 3902 transitions. [2020-07-07 13:21:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:35,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2020-07-07 13:21:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:35,195 INFO L225 Difference]: With dead ends: 3083 [2020-07-07 13:21:35,195 INFO L226 Difference]: Without dead ends: 1908 [2020-07-07 13:21:35,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-07-07 13:21:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1906. [2020-07-07 13:21:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1906 states. [2020-07-07 13:21:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2384 transitions. [2020-07-07 13:21:35,361 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2384 transitions. Word has length 238 [2020-07-07 13:21:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:35,361 INFO L479 AbstractCegarLoop]: Abstraction has 1906 states and 2384 transitions. [2020-07-07 13:21:35,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2384 transitions. [2020-07-07 13:21:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-07 13:21:35,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:35,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:35,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 13:21:35,368 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:35,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1847120940, now seen corresponding path program 1 times [2020-07-07 13:21:35,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:35,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127200936] [2020-07-07 13:21:35,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:35,483 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 13:21:35,483 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:35,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127200936] [2020-07-07 13:21:35,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:35,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:35,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272916643] [2020-07-07 13:21:35,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:35,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:35,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:35,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:35,486 INFO L87 Difference]: Start difference. First operand 1906 states and 2384 transitions. Second operand 3 states. [2020-07-07 13:21:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:35,766 INFO L93 Difference]: Finished difference Result 3622 states and 4566 transitions. [2020-07-07 13:21:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:35,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-07 13:21:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:35,776 INFO L225 Difference]: With dead ends: 3622 [2020-07-07 13:21:35,776 INFO L226 Difference]: Without dead ends: 1871 [2020-07-07 13:21:35,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2020-07-07 13:21:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2020-07-07 13:21:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1869 states. [2020-07-07 13:21:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2338 transitions. [2020-07-07 13:21:35,940 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2338 transitions. Word has length 240 [2020-07-07 13:21:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:35,940 INFO L479 AbstractCegarLoop]: Abstraction has 1869 states and 2338 transitions. [2020-07-07 13:21:35,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2338 transitions. [2020-07-07 13:21:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-07 13:21:35,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:35,945 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:35,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 13:21:35,946 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash 400073983, now seen corresponding path program 1 times [2020-07-07 13:21:35,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:35,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140057963] [2020-07-07 13:21:35,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:36,038 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 13:21:36,039 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:36,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140057963] [2020-07-07 13:21:36,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:36,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:36,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726638954] [2020-07-07 13:21:36,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:36,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:36,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:36,041 INFO L87 Difference]: Start difference. First operand 1869 states and 2338 transitions. Second operand 4 states. [2020-07-07 13:21:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:36,807 INFO L93 Difference]: Finished difference Result 5375 states and 6855 transitions. [2020-07-07 13:21:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:36,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-07-07 13:21:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:36,826 INFO L225 Difference]: With dead ends: 5375 [2020-07-07 13:21:36,826 INFO L226 Difference]: Without dead ends: 3661 [2020-07-07 13:21:36,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2020-07-07 13:21:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 1878. [2020-07-07 13:21:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1878 states. [2020-07-07 13:21:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2347 transitions. [2020-07-07 13:21:37,057 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2347 transitions. Word has length 241 [2020-07-07 13:21:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:37,058 INFO L479 AbstractCegarLoop]: Abstraction has 1878 states and 2347 transitions. [2020-07-07 13:21:37,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2347 transitions. [2020-07-07 13:21:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-07 13:21:37,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:37,063 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:37,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 13:21:37,064 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:37,064 INFO L82 PathProgramCache]: Analyzing trace with hash -255766369, now seen corresponding path program 1 times [2020-07-07 13:21:37,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:37,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267686668] [2020-07-07 13:21:37,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:37,165 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 13:21:37,165 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:37,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267686668] [2020-07-07 13:21:37,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:37,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:37,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823334331] [2020-07-07 13:21:37,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:37,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:37,167 INFO L87 Difference]: Start difference. First operand 1878 states and 2347 transitions. Second operand 4 states. [2020-07-07 13:21:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:37,870 INFO L93 Difference]: Finished difference Result 5427 states and 6873 transitions. [2020-07-07 13:21:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:37,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-07-07 13:21:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:37,889 INFO L225 Difference]: With dead ends: 5427 [2020-07-07 13:21:37,890 INFO L226 Difference]: Without dead ends: 3680 [2020-07-07 13:21:37,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2020-07-07 13:21:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 1918. [2020-07-07 13:21:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-07-07 13:21:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2409 transitions. [2020-07-07 13:21:38,104 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2409 transitions. Word has length 241 [2020-07-07 13:21:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:38,104 INFO L479 AbstractCegarLoop]: Abstraction has 1918 states and 2409 transitions. [2020-07-07 13:21:38,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2409 transitions. [2020-07-07 13:21:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-07-07 13:21:38,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:38,109 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:38,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 13:21:38,111 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:38,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:38,111 INFO L82 PathProgramCache]: Analyzing trace with hash -460241056, now seen corresponding path program 1 times [2020-07-07 13:21:38,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:38,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992790138] [2020-07-07 13:21:38,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:38,208 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 13:21:38,209 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:38,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992790138] [2020-07-07 13:21:38,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:38,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:38,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958893003] [2020-07-07 13:21:38,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:38,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:38,211 INFO L87 Difference]: Start difference. First operand 1918 states and 2409 transitions. Second operand 4 states. [2020-07-07 13:21:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:39,044 INFO L93 Difference]: Finished difference Result 4553 states and 5817 transitions. [2020-07-07 13:21:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:39,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-07-07 13:21:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:39,058 INFO L225 Difference]: With dead ends: 4553 [2020-07-07 13:21:39,059 INFO L226 Difference]: Without dead ends: 2760 [2020-07-07 13:21:39,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2020-07-07 13:21:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 1425. [2020-07-07 13:21:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1425 states. [2020-07-07 13:21:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1761 transitions. [2020-07-07 13:21:39,228 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1761 transitions. Word has length 244 [2020-07-07 13:21:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:39,228 INFO L479 AbstractCegarLoop]: Abstraction has 1425 states and 1761 transitions. [2020-07-07 13:21:39,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1761 transitions. [2020-07-07 13:21:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-07-07 13:21:39,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:39,232 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:39,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 13:21:39,233 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:39,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1274309676, now seen corresponding path program 1 times [2020-07-07 13:21:39,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:39,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732321819] [2020-07-07 13:21:39,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:39,328 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 13:21:39,328 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:39,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732321819] [2020-07-07 13:21:39,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:39,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:39,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276503963] [2020-07-07 13:21:39,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:39,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:39,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:39,331 INFO L87 Difference]: Start difference. First operand 1425 states and 1761 transitions. Second operand 3 states. [2020-07-07 13:21:39,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:39,646 INFO L93 Difference]: Finished difference Result 2821 states and 3513 transitions. [2020-07-07 13:21:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:39,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2020-07-07 13:21:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:39,655 INFO L225 Difference]: With dead ends: 2821 [2020-07-07 13:21:39,655 INFO L226 Difference]: Without dead ends: 1551 [2020-07-07 13:21:39,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2020-07-07 13:21:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1521. [2020-07-07 13:21:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1521 states. [2020-07-07 13:21:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1869 transitions. [2020-07-07 13:21:39,831 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1869 transitions. Word has length 251 [2020-07-07 13:21:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:39,832 INFO L479 AbstractCegarLoop]: Abstraction has 1521 states and 1869 transitions. [2020-07-07 13:21:39,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1869 transitions. [2020-07-07 13:21:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-07-07 13:21:39,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:39,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:39,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 13:21:39,837 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1565810676, now seen corresponding path program 1 times [2020-07-07 13:21:39,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:39,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073888543] [2020-07-07 13:21:39,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:39,948 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 13:21:39,948 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:39,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073888543] [2020-07-07 13:21:39,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:39,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:39,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022929341] [2020-07-07 13:21:39,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:39,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:39,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:39,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:39,951 INFO L87 Difference]: Start difference. First operand 1521 states and 1869 transitions. Second operand 4 states. [2020-07-07 13:21:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:40,732 INFO L93 Difference]: Finished difference Result 4339 states and 5411 transitions. [2020-07-07 13:21:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:40,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 259 [2020-07-07 13:21:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:40,747 INFO L225 Difference]: With dead ends: 4339 [2020-07-07 13:21:40,747 INFO L226 Difference]: Without dead ends: 2961 [2020-07-07 13:21:40,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2020-07-07 13:21:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 1543. [2020-07-07 13:21:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-07-07 13:21:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 1901 transitions. [2020-07-07 13:21:40,925 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 1901 transitions. Word has length 259 [2020-07-07 13:21:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:40,925 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 1901 transitions. [2020-07-07 13:21:40,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 1901 transitions. [2020-07-07 13:21:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-07-07 13:21:40,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:40,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:40,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 13:21:40,931 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:40,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:40,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1099402533, now seen corresponding path program 1 times [2020-07-07 13:21:40,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:40,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110511133] [2020-07-07 13:21:40,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:41,101 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 13:21:41,101 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:41,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110511133] [2020-07-07 13:21:41,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:41,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:41,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451257583] [2020-07-07 13:21:41,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:41,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:41,105 INFO L87 Difference]: Start difference. First operand 1543 states and 1901 transitions. Second operand 3 states. [2020-07-07 13:21:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:41,496 INFO L93 Difference]: Finished difference Result 3074 states and 3825 transitions. [2020-07-07 13:21:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:41,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 263 [2020-07-07 13:21:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:41,520 INFO L225 Difference]: With dead ends: 3074 [2020-07-07 13:21:41,520 INFO L226 Difference]: Without dead ends: 1686 [2020-07-07 13:21:41,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-07-07 13:21:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1609. [2020-07-07 13:21:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-07-07 13:21:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 1979 transitions. [2020-07-07 13:21:41,695 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 1979 transitions. Word has length 263 [2020-07-07 13:21:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:41,696 INFO L479 AbstractCegarLoop]: Abstraction has 1609 states and 1979 transitions. [2020-07-07 13:21:41,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 1979 transitions. [2020-07-07 13:21:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-07-07 13:21:41,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:41,701 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:41,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 13:21:41,701 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:41,702 INFO L82 PathProgramCache]: Analyzing trace with hash -962704645, now seen corresponding path program 1 times [2020-07-07 13:21:41,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:41,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473552689] [2020-07-07 13:21:41,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:41,799 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 13:21:41,799 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:41,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473552689] [2020-07-07 13:21:41,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:41,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:41,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191861544] [2020-07-07 13:21:41,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:41,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:41,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:41,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:41,801 INFO L87 Difference]: Start difference. First operand 1609 states and 1979 transitions. Second operand 3 states. [2020-07-07 13:21:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:41,954 INFO L93 Difference]: Finished difference Result 3095 states and 3839 transitions. [2020-07-07 13:21:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:41,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 271 [2020-07-07 13:21:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:41,961 INFO L225 Difference]: With dead ends: 3095 [2020-07-07 13:21:41,961 INFO L226 Difference]: Without dead ends: 1641 [2020-07-07 13:21:41,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2020-07-07 13:21:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1637. [2020-07-07 13:21:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1637 states. [2020-07-07 13:21:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2011 transitions. [2020-07-07 13:21:42,227 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2011 transitions. Word has length 271 [2020-07-07 13:21:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:42,228 INFO L479 AbstractCegarLoop]: Abstraction has 1637 states and 2011 transitions. [2020-07-07 13:21:42,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2011 transitions. [2020-07-07 13:21:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-07-07 13:21:42,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:42,233 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:42,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 13:21:42,233 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1268615101, now seen corresponding path program 1 times [2020-07-07 13:21:42,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:42,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702687092] [2020-07-07 13:21:42,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,390 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 13:21:42,391 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:42,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702687092] [2020-07-07 13:21:42,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:42,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:42,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443972502] [2020-07-07 13:21:42,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:42,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:42,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:42,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:42,393 INFO L87 Difference]: Start difference. First operand 1637 states and 2011 transitions. Second operand 4 states. [2020-07-07 13:21:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:43,058 INFO L93 Difference]: Finished difference Result 4705 states and 5841 transitions. [2020-07-07 13:21:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:43,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 272 [2020-07-07 13:21:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:43,067 INFO L225 Difference]: With dead ends: 4705 [2020-07-07 13:21:43,068 INFO L226 Difference]: Without dead ends: 3223 [2020-07-07 13:21:43,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2020-07-07 13:21:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 1643. [2020-07-07 13:21:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1643 states. [2020-07-07 13:21:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2017 transitions. [2020-07-07 13:21:43,299 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2017 transitions. Word has length 272 [2020-07-07 13:21:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:43,299 INFO L479 AbstractCegarLoop]: Abstraction has 1643 states and 2017 transitions. [2020-07-07 13:21:43,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2017 transitions. [2020-07-07 13:21:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-07 13:21:43,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:43,304 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:43,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 13:21:43,305 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:43,305 INFO L82 PathProgramCache]: Analyzing trace with hash 794458964, now seen corresponding path program 1 times [2020-07-07 13:21:43,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:43,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957732858] [2020-07-07 13:21:43,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:43,478 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 13:21:43,478 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:43,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957732858] [2020-07-07 13:21:43,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:43,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:43,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481281841] [2020-07-07 13:21:43,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:43,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:43,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:43,481 INFO L87 Difference]: Start difference. First operand 1643 states and 2017 transitions. Second operand 3 states. [2020-07-07 13:21:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:43,777 INFO L93 Difference]: Finished difference Result 4573 states and 5675 transitions. [2020-07-07 13:21:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:43,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2020-07-07 13:21:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:43,786 INFO L225 Difference]: With dead ends: 4573 [2020-07-07 13:21:43,786 INFO L226 Difference]: Without dead ends: 3085 [2020-07-07 13:21:43,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2020-07-07 13:21:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 1645. [2020-07-07 13:21:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-07-07 13:21:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2019 transitions. [2020-07-07 13:21:44,027 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2019 transitions. Word has length 299 [2020-07-07 13:21:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:44,028 INFO L479 AbstractCegarLoop]: Abstraction has 1645 states and 2019 transitions. [2020-07-07 13:21:44,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2019 transitions. [2020-07-07 13:21:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-07 13:21:44,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:44,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:44,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 13:21:44,031 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1359318092, now seen corresponding path program 1 times [2020-07-07 13:21:44,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:44,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570743334] [2020-07-07 13:21:44,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:44,145 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 13:21:44,145 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:44,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570743334] [2020-07-07 13:21:44,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:44,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:44,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571715254] [2020-07-07 13:21:44,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:44,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:44,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:44,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:44,147 INFO L87 Difference]: Start difference. First operand 1645 states and 2019 transitions. Second operand 3 states. [2020-07-07 13:21:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:44,498 INFO L93 Difference]: Finished difference Result 3276 states and 4059 transitions. [2020-07-07 13:21:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:44,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2020-07-07 13:21:44,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:44,503 INFO L225 Difference]: With dead ends: 3276 [2020-07-07 13:21:44,503 INFO L226 Difference]: Without dead ends: 1786 [2020-07-07 13:21:44,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2020-07-07 13:21:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1725. [2020-07-07 13:21:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1725 states. [2020-07-07 13:21:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2113 transitions. [2020-07-07 13:21:44,769 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2113 transitions. Word has length 299 [2020-07-07 13:21:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:44,770 INFO L479 AbstractCegarLoop]: Abstraction has 1725 states and 2113 transitions. [2020-07-07 13:21:44,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2113 transitions. [2020-07-07 13:21:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-07-07 13:21:44,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:44,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:44,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-07 13:21:44,777 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash 893866712, now seen corresponding path program 1 times [2020-07-07 13:21:44,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:44,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481687076] [2020-07-07 13:21:44,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:44,955 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 13:21:44,955 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:44,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481687076] [2020-07-07 13:21:44,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:44,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:21:44,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512529413] [2020-07-07 13:21:44,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:21:44,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:44,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:21:44,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:44,957 INFO L87 Difference]: Start difference. First operand 1725 states and 2113 transitions. Second operand 5 states. [2020-07-07 13:21:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:45,371 INFO L93 Difference]: Finished difference Result 3469 states and 4275 transitions. [2020-07-07 13:21:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:45,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2020-07-07 13:21:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:45,376 INFO L225 Difference]: With dead ends: 3469 [2020-07-07 13:21:45,376 INFO L226 Difference]: Without dead ends: 1899 [2020-07-07 13:21:45,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2020-07-07 13:21:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1827. [2020-07-07 13:21:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1827 states. [2020-07-07 13:21:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 2221 transitions. [2020-07-07 13:21:45,655 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 2221 transitions. Word has length 302 [2020-07-07 13:21:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:45,656 INFO L479 AbstractCegarLoop]: Abstraction has 1827 states and 2221 transitions. [2020-07-07 13:21:45,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:21:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 2221 transitions. [2020-07-07 13:21:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-07-07 13:21:45,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:45,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:45,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-07 13:21:45,662 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash -444397713, now seen corresponding path program 1 times [2020-07-07 13:21:45,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:45,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285183645] [2020-07-07 13:21:45,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:45,863 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 13:21:45,863 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:45,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285183645] [2020-07-07 13:21:45,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:45,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:21:45,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138985058] [2020-07-07 13:21:45,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:21:45,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:21:45,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:45,864 INFO L87 Difference]: Start difference. First operand 1827 states and 2221 transitions. Second operand 5 states. [2020-07-07 13:21:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:46,243 INFO L93 Difference]: Finished difference Result 3687 states and 4507 transitions. [2020-07-07 13:21:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:46,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 306 [2020-07-07 13:21:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:46,247 INFO L225 Difference]: With dead ends: 3687 [2020-07-07 13:21:46,247 INFO L226 Difference]: Without dead ends: 2015 [2020-07-07 13:21:46,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2020-07-07 13:21:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1868. [2020-07-07 13:21:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1868 states. [2020-07-07 13:21:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2273 transitions. [2020-07-07 13:21:46,525 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2273 transitions. Word has length 306 [2020-07-07 13:21:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:46,526 INFO L479 AbstractCegarLoop]: Abstraction has 1868 states and 2273 transitions. [2020-07-07 13:21:46,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:21:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2273 transitions. [2020-07-07 13:21:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-07-07 13:21:46,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:46,531 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:46,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-07 13:21:46,531 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1267878306, now seen corresponding path program 1 times [2020-07-07 13:21:46,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:46,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980935804] [2020-07-07 13:21:46,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:46,649 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 13:21:46,649 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:46,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980935804] [2020-07-07 13:21:46,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:46,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:46,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959993659] [2020-07-07 13:21:46,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:46,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:46,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:46,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:46,651 INFO L87 Difference]: Start difference. First operand 1868 states and 2273 transitions. Second operand 4 states. [2020-07-07 13:21:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:47,431 INFO L93 Difference]: Finished difference Result 5326 states and 6561 transitions. [2020-07-07 13:21:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:47,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-07-07 13:21:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:47,441 INFO L225 Difference]: With dead ends: 5326 [2020-07-07 13:21:47,441 INFO L226 Difference]: Without dead ends: 3587 [2020-07-07 13:21:47,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2020-07-07 13:21:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 1916. [2020-07-07 13:21:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2020-07-07 13:21:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2333 transitions. [2020-07-07 13:21:47,756 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2333 transitions. Word has length 309 [2020-07-07 13:21:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:47,756 INFO L479 AbstractCegarLoop]: Abstraction has 1916 states and 2333 transitions. [2020-07-07 13:21:47,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2333 transitions. [2020-07-07 13:21:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-07 13:21:47,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:47,760 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:47,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-07 13:21:47,760 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:47,760 INFO L82 PathProgramCache]: Analyzing trace with hash -747447560, now seen corresponding path program 1 times [2020-07-07 13:21:47,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:47,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237270487] [2020-07-07 13:21:47,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:47,890 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 13:21:47,890 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:47,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237270487] [2020-07-07 13:21:47,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:47,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:21:47,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177052192] [2020-07-07 13:21:47,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:21:47,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:21:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:47,892 INFO L87 Difference]: Start difference. First operand 1916 states and 2333 transitions. Second operand 5 states. [2020-07-07 13:21:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:48,881 INFO L93 Difference]: Finished difference Result 5638 states and 6933 transitions. [2020-07-07 13:21:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:21:48,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2020-07-07 13:21:48,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:48,887 INFO L225 Difference]: With dead ends: 5638 [2020-07-07 13:21:48,887 INFO L226 Difference]: Without dead ends: 3723 [2020-07-07 13:21:48,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:21:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-07-07 13:21:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 2046. [2020-07-07 13:21:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2046 states. [2020-07-07 13:21:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 2495 transitions. [2020-07-07 13:21:49,287 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 2495 transitions. Word has length 310 [2020-07-07 13:21:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:49,288 INFO L479 AbstractCegarLoop]: Abstraction has 2046 states and 2495 transitions. [2020-07-07 13:21:49,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:21:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 2495 transitions. [2020-07-07 13:21:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-07-07 13:21:49,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:49,292 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:49,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-07 13:21:49,292 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:49,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1909019013, now seen corresponding path program 1 times [2020-07-07 13:21:49,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:49,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076802067] [2020-07-07 13:21:49,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:49,423 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 13:21:49,424 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:49,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076802067] [2020-07-07 13:21:49,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:49,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:21:49,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897247594] [2020-07-07 13:21:49,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:21:49,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:21:49,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:21:49,426 INFO L87 Difference]: Start difference. First operand 2046 states and 2495 transitions. Second operand 4 states. [2020-07-07 13:21:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:49,932 INFO L93 Difference]: Finished difference Result 4219 states and 5159 transitions. [2020-07-07 13:21:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:21:49,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 316 [2020-07-07 13:21:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:49,936 INFO L225 Difference]: With dead ends: 4219 [2020-07-07 13:21:49,937 INFO L226 Difference]: Without dead ends: 2328 [2020-07-07 13:21:49,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:21:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2020-07-07 13:21:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2062. [2020-07-07 13:21:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-07-07 13:21:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2509 transitions. [2020-07-07 13:21:50,241 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2509 transitions. Word has length 316 [2020-07-07 13:21:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:50,242 INFO L479 AbstractCegarLoop]: Abstraction has 2062 states and 2509 transitions. [2020-07-07 13:21:50,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:21:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2509 transitions. [2020-07-07 13:21:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-07 13:21:50,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:50,246 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:50,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-07 13:21:50,247 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:50,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1455323989, now seen corresponding path program 1 times [2020-07-07 13:21:50,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:50,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441704620] [2020-07-07 13:21:50,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:50,387 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 13:21:50,387 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:50,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441704620] [2020-07-07 13:21:50,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:50,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:50,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333024333] [2020-07-07 13:21:50,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:50,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:50,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:50,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:50,389 INFO L87 Difference]: Start difference. First operand 2062 states and 2509 transitions. Second operand 3 states. [2020-07-07 13:21:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:50,953 INFO L93 Difference]: Finished difference Result 5768 states and 7074 transitions. [2020-07-07 13:21:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:50,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-07 13:21:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:50,958 INFO L225 Difference]: With dead ends: 5768 [2020-07-07 13:21:50,958 INFO L226 Difference]: Without dead ends: 3861 [2020-07-07 13:21:50,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2020-07-07 13:21:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3857. [2020-07-07 13:21:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3857 states. [2020-07-07 13:21:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 4715 transitions. [2020-07-07 13:21:51,525 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 4715 transitions. Word has length 328 [2020-07-07 13:21:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:51,526 INFO L479 AbstractCegarLoop]: Abstraction has 3857 states and 4715 transitions. [2020-07-07 13:21:51,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 4715 transitions. [2020-07-07 13:21:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-07 13:21:51,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:51,530 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:51,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-07 13:21:51,530 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash 837433633, now seen corresponding path program 1 times [2020-07-07 13:21:51,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:51,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691997327] [2020-07-07 13:21:51,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:51,671 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 13:21:51,671 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:51,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691997327] [2020-07-07 13:21:51,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:51,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:51,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957261574] [2020-07-07 13:21:51,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:51,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:51,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:51,674 INFO L87 Difference]: Start difference. First operand 3857 states and 4715 transitions. Second operand 3 states. [2020-07-07 13:21:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:52,595 INFO L93 Difference]: Finished difference Result 7675 states and 9423 transitions. [2020-07-07 13:21:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:52,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-07 13:21:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:52,600 INFO L225 Difference]: With dead ends: 7675 [2020-07-07 13:21:52,600 INFO L226 Difference]: Without dead ends: 3973 [2020-07-07 13:21:52,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:21:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2020-07-07 13:21:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3949. [2020-07-07 13:21:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3949 states. [2020-07-07 13:21:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 4807 transitions. [2020-07-07 13:21:53,121 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 4807 transitions. Word has length 329 [2020-07-07 13:21:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:53,122 INFO L479 AbstractCegarLoop]: Abstraction has 3949 states and 4807 transitions. [2020-07-07 13:21:53,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 4807 transitions. [2020-07-07 13:21:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-07 13:21:53,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:53,125 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-07 13:21:53,125 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1972793019, now seen corresponding path program 1 times [2020-07-07 13:21:53,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:53,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885862770] [2020-07-07 13:21:53,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:53,213 ERROR L253 erpolLogProxyWrapper]: Interpolant 245 not inductive [2020-07-07 13:21:53,218 ERROR L276 FreeRefinementEngine]: Caught unknown exception: generated interpolants did not pass sanity check [2020-07-07 13:21:53,218 WARN L341 FreeRefinementEngine]: Global settings require throwing the following exception [2020-07-07 13:21:53,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-07 13:21:53,219 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:222) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:884) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:385) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:337) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:239) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:108) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:146) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:102) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:21:53,225 INFO L168 Benchmark]: Toolchain (without parser) took 28600.31 ms. Allocated memory was 140.0 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 104.2 MB in the beginning and 977.8 MB in the end (delta: -873.7 MB). Peak memory consumption was 267.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:53,226 INFO L168 Benchmark]: CDTParser took 0.95 ms. Allocated memory is still 140.0 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:21:53,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 612.20 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 104.0 MB in the beginning and 178.7 MB in the end (delta: -74.8 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:53,227 INFO L168 Benchmark]: Boogie Preprocessor took 67.19 ms. Allocated memory is still 203.9 MB. Free memory was 178.7 MB in the beginning and 175.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:53,227 INFO L168 Benchmark]: RCFGBuilder took 1193.03 ms. Allocated memory is still 203.9 MB. Free memory was 175.5 MB in the beginning and 97.9 MB in the end (delta: 77.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:53,228 INFO L168 Benchmark]: TraceAbstraction took 26722.51 ms. Allocated memory was 203.9 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 97.9 MB in the beginning and 977.8 MB in the end (delta: -880.0 MB). Peak memory consumption was 196.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:53,230 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.95 ms. Allocated memory is still 140.0 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 612.20 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 104.0 MB in the beginning and 178.7 MB in the end (delta: -74.8 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.19 ms. Allocated memory is still 203.9 MB. Free memory was 178.7 MB in the beginning and 175.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1193.03 ms. Allocated memory is still 203.9 MB. Free memory was 175.5 MB in the beginning and 97.9 MB in the end (delta: 77.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26722.51 ms. Allocated memory was 203.9 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 97.9 MB in the beginning and 977.8 MB in the end (delta: -880.0 MB). Peak memory consumption was 196.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...