/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:10:51,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:10:51,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:10:51,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 05:10:51,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:10:51,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:10:51,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:10:51,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:10:51,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:10:51,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:10:51,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:10:51,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:10:51,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:10:51,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:10:51,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:10:51,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:10:51,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:10:51,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:10:51,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:10:51,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:10:51,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:10:51,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:10:51,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:10:51,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:10:51,346 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:10:51,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:10:51,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:10:51,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:10:51,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:10:51,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:10:51,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:10:51,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:10:51,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:10:51,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:10:51,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:10:51,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:10:51,350 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:10:51,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:10:51,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:10:51,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:10:51,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:10:51,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:10:51,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:10:51,351 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:10:51,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:10:51,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:10:51,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:10:51,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:10:51,782 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:10:51,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-11-07 05:10:51,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5951e86fb/b07dcb370bce451f818c34dc259c121a/FLAGa372daba7 [2020-11-07 05:10:52,648 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:10:52,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-11-07 05:10:52,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5951e86fb/b07dcb370bce451f818c34dc259c121a/FLAGa372daba7 [2020-11-07 05:10:52,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5951e86fb/b07dcb370bce451f818c34dc259c121a [2020-11-07 05:10:52,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:10:53,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:10:53,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:10:53,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:10:53,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:10:53,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:10:52" (1/1) ... [2020-11-07 05:10:53,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a56918c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53, skipping insertion in model container [2020-11-07 05:10:53,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:10:52" (1/1) ... [2020-11-07 05:10:53,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:10:53,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:10:53,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:10:53,307 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:10:53,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:10:53,364 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:10:53,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53 WrapperNode [2020-11-07 05:10:53,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:10:53,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:10:53,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:10:53,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:10:53,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (1/1) ... [2020-11-07 05:10:53,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (1/1) ... [2020-11-07 05:10:53,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (1/1) ... [2020-11-07 05:10:53,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (1/1) ... [2020-11-07 05:10:53,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (1/1) ... [2020-11-07 05:10:53,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (1/1) ... [2020-11-07 05:10:53,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (1/1) ... [2020-11-07 05:10:53,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:10:53,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:10:53,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:10:53,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:10:53,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (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 [2020-11-07 05:10:53,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:10:53,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:10:53,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:10:53,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:10:53,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:10:53,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:10:53,528 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:10:53,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:10:53,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 05:10:53,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:10:53,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:10:53,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:10:53,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:10:53,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:10:53,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:10:53,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:10:54,351 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:10:54,352 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 05:10:54,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:10:54 BoogieIcfgContainer [2020-11-07 05:10:54,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:10:54,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:10:54,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:10:54,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:10:54,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:10:52" (1/3) ... [2020-11-07 05:10:54,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416ef45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:10:54, skipping insertion in model container [2020-11-07 05:10:54,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:10:53" (2/3) ... [2020-11-07 05:10:54,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416ef45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:10:54, skipping insertion in model container [2020-11-07 05:10:54,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:10:54" (3/3) ... [2020-11-07 05:10:54,364 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-11-07 05:10:54,384 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:10:54,389 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:10:54,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:10:54,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:10:54,433 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:10:54,434 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:10:54,434 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:10:54,434 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:10:54,434 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:10:54,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:10:54,435 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:10:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-11-07 05:10:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-07 05:10:54,469 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:10:54,470 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] [2020-11-07 05:10:54,471 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:10:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:10:54,484 INFO L82 PathProgramCache]: Analyzing trace with hash -29840839, now seen corresponding path program 1 times [2020-11-07 05:10:54,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:10:54,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416835423] [2020-11-07 05:10:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:10:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:54,914 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-07 05:10:54,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:10:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:10:54,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416835423] [2020-11-07 05:10:54,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:10:54,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:10:54,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438469223] [2020-11-07 05:10:54,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:10:54,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:10:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:10:54,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:10:55,003 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2020-11-07 05:10:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:10:55,583 INFO L93 Difference]: Finished difference Result 291 states and 398 transitions. [2020-11-07 05:10:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:10:55,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-11-07 05:10:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:10:55,601 INFO L225 Difference]: With dead ends: 291 [2020-11-07 05:10:55,601 INFO L226 Difference]: Without dead ends: 200 [2020-11-07 05:10:55,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:10:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-11-07 05:10:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-11-07 05:10:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 05:10:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 261 transitions. [2020-11-07 05:10:55,718 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 261 transitions. Word has length 88 [2020-11-07 05:10:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:10:55,719 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 261 transitions. [2020-11-07 05:10:55,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:10:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 261 transitions. [2020-11-07 05:10:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 05:10:55,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:10:55,728 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] [2020-11-07 05:10:55,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:10:55,729 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:10:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:10:55,731 INFO L82 PathProgramCache]: Analyzing trace with hash -282351705, now seen corresponding path program 1 times [2020-11-07 05:10:55,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:10:55,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616064145] [2020-11-07 05:10:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:10:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:55,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:10:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:10:55,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616064145] [2020-11-07 05:10:55,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:10:55,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:10:55,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073485601] [2020-11-07 05:10:55,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:10:55,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:10:55,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:10:55,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:10:55,974 INFO L87 Difference]: Start difference. First operand 199 states and 261 transitions. Second operand 4 states. [2020-11-07 05:10:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:10:56,360 INFO L93 Difference]: Finished difference Result 239 states and 320 transitions. [2020-11-07 05:10:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:10:56,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-11-07 05:10:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:10:56,364 INFO L225 Difference]: With dead ends: 239 [2020-11-07 05:10:56,364 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 05:10:56,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:10:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 05:10:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 199. [2020-11-07 05:10:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 05:10:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 260 transitions. [2020-11-07 05:10:56,409 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 260 transitions. Word has length 89 [2020-11-07 05:10:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:10:56,410 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 260 transitions. [2020-11-07 05:10:56,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:10:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 260 transitions. [2020-11-07 05:10:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 05:10:56,412 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:10:56,413 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] [2020-11-07 05:10:56,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:10:56,413 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:10:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:10:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash -917522190, now seen corresponding path program 1 times [2020-11-07 05:10:56,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:10:56,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202823229] [2020-11-07 05:10:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:10:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:56,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:10:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:10:56,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202823229] [2020-11-07 05:10:56,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:10:56,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:10:56,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646429889] [2020-11-07 05:10:56,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:10:56,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:10:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:10:56,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:10:56,537 INFO L87 Difference]: Start difference. First operand 199 states and 260 transitions. Second operand 4 states. [2020-11-07 05:10:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:10:56,920 INFO L93 Difference]: Finished difference Result 475 states and 657 transitions. [2020-11-07 05:10:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:10:56,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-11-07 05:10:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:10:56,927 INFO L225 Difference]: With dead ends: 475 [2020-11-07 05:10:56,927 INFO L226 Difference]: Without dead ends: 333 [2020-11-07 05:10:56,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:10:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-11-07 05:10:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2020-11-07 05:10:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-11-07 05:10:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-11-07 05:10:57,035 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 449 transitions. Word has length 89 [2020-11-07 05:10:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:10:57,036 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-11-07 05:10:57,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:10:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 449 transitions. [2020-11-07 05:10:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-07 05:10:57,039 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:10:57,039 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] [2020-11-07 05:10:57,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:10:57,039 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:10:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:10:57,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2121163263, now seen corresponding path program 1 times [2020-11-07 05:10:57,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:10:57,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405983518] [2020-11-07 05:10:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:10:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:57,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:10:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:10:57,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405983518] [2020-11-07 05:10:57,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:10:57,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:10:57,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401356554] [2020-11-07 05:10:57,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:10:57,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:10:57,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:10:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:10:57,134 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 4 states. [2020-11-07 05:10:57,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:10:57,482 INFO L93 Difference]: Finished difference Result 404 states and 556 transitions. [2020-11-07 05:10:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:10:57,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-11-07 05:10:57,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:10:57,485 INFO L225 Difference]: With dead ends: 404 [2020-11-07 05:10:57,486 INFO L226 Difference]: Without dead ends: 401 [2020-11-07 05:10:57,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:10:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-11-07 05:10:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 332. [2020-11-07 05:10:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-11-07 05:10:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 447 transitions. [2020-11-07 05:10:57,548 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 447 transitions. Word has length 90 [2020-11-07 05:10:57,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:10:57,548 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 447 transitions. [2020-11-07 05:10:57,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:10:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 447 transitions. [2020-11-07 05:10:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-07 05:10:57,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:10:57,550 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] [2020-11-07 05:10:57,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 05:10:57,551 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:10:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:10:57,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1629138533, now seen corresponding path program 1 times [2020-11-07 05:10:57,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:10:57,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465802576] [2020-11-07 05:10:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:10:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:57,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:10:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:10:57,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465802576] [2020-11-07 05:10:57,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:10:57,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:10:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986130382] [2020-11-07 05:10:57,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:10:57,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:10:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:10:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:10:57,667 INFO L87 Difference]: Start difference. First operand 332 states and 447 transitions. Second operand 4 states. [2020-11-07 05:10:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:10:58,063 INFO L93 Difference]: Finished difference Result 868 states and 1210 transitions. [2020-11-07 05:10:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:10:58,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-11-07 05:10:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:10:58,068 INFO L225 Difference]: With dead ends: 868 [2020-11-07 05:10:58,068 INFO L226 Difference]: Without dead ends: 593 [2020-11-07 05:10:58,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:10:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-11-07 05:10:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 592. [2020-11-07 05:10:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-11-07 05:10:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 811 transitions. [2020-11-07 05:10:58,200 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 811 transitions. Word has length 90 [2020-11-07 05:10:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:10:58,201 INFO L481 AbstractCegarLoop]: Abstraction has 592 states and 811 transitions. [2020-11-07 05:10:58,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:10:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 811 transitions. [2020-11-07 05:10:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 05:10:58,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:10:58,204 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] [2020-11-07 05:10:58,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 05:10:58,204 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:10:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:10:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash -679272525, now seen corresponding path program 1 times [2020-11-07 05:10:58,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:10:58,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169299981] [2020-11-07 05:10:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:10:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:58,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:10:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:10:58,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169299981] [2020-11-07 05:10:58,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:10:58,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:10:58,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562747315] [2020-11-07 05:10:58,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:10:58,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:10:58,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:10:58,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:10:58,293 INFO L87 Difference]: Start difference. First operand 592 states and 811 transitions. Second operand 4 states. [2020-11-07 05:10:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:10:58,696 INFO L93 Difference]: Finished difference Result 724 states and 1006 transitions. [2020-11-07 05:10:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:10:58,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-11-07 05:10:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:10:58,702 INFO L225 Difference]: With dead ends: 724 [2020-11-07 05:10:58,702 INFO L226 Difference]: Without dead ends: 721 [2020-11-07 05:10:58,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:10:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-11-07 05:10:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 592. [2020-11-07 05:10:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-11-07 05:10:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 807 transitions. [2020-11-07 05:10:58,811 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 807 transitions. Word has length 91 [2020-11-07 05:10:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:10:58,811 INFO L481 AbstractCegarLoop]: Abstraction has 592 states and 807 transitions. [2020-11-07 05:10:58,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:10:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 807 transitions. [2020-11-07 05:10:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 05:10:58,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:10:58,813 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] [2020-11-07 05:10:58,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 05:10:58,813 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:10:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:10:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1028746146, now seen corresponding path program 1 times [2020-11-07 05:10:58,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:10:58,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179441599] [2020-11-07 05:10:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:10:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:10:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:10:58,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179441599] [2020-11-07 05:10:58,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:10:58,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:10:58,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989170596] [2020-11-07 05:10:58,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:10:58,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:10:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:10:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:10:58,926 INFO L87 Difference]: Start difference. First operand 592 states and 807 transitions. Second operand 4 states. [2020-11-07 05:10:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:10:59,434 INFO L93 Difference]: Finished difference Result 1636 states and 2274 transitions. [2020-11-07 05:10:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:10:59,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-11-07 05:10:59,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:10:59,441 INFO L225 Difference]: With dead ends: 1636 [2020-11-07 05:10:59,441 INFO L226 Difference]: Without dead ends: 1101 [2020-11-07 05:10:59,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:10:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-11-07 05:10:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1100. [2020-11-07 05:10:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2020-11-07 05:10:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1507 transitions. [2020-11-07 05:10:59,625 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1507 transitions. Word has length 91 [2020-11-07 05:10:59,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:10:59,626 INFO L481 AbstractCegarLoop]: Abstraction has 1100 states and 1507 transitions. [2020-11-07 05:10:59,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:10:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1507 transitions. [2020-11-07 05:10:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 05:10:59,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:10:59,628 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] [2020-11-07 05:10:59,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 05:10:59,629 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:10:59,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:10:59,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1818781039, now seen corresponding path program 1 times [2020-11-07 05:10:59,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:10:59,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126171061] [2020-11-07 05:10:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:10:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:10:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:10:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:10:59,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126171061] [2020-11-07 05:10:59,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:10:59,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:10:59,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853901481] [2020-11-07 05:10:59,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:10:59,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:10:59,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:10:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:10:59,706 INFO L87 Difference]: Start difference. First operand 1100 states and 1507 transitions. Second operand 4 states. [2020-11-07 05:11:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:00,577 INFO L93 Difference]: Finished difference Result 3136 states and 4342 transitions. [2020-11-07 05:11:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:00,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-11-07 05:11:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:00,590 INFO L225 Difference]: With dead ends: 3136 [2020-11-07 05:11:00,590 INFO L226 Difference]: Without dead ends: 2093 [2020-11-07 05:11:00,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:00,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2020-11-07 05:11:00,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2092. [2020-11-07 05:11:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-11-07 05:11:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2859 transitions. [2020-11-07 05:11:00,909 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2859 transitions. Word has length 92 [2020-11-07 05:11:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:00,909 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2859 transitions. [2020-11-07 05:11:00,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2859 transitions. [2020-11-07 05:11:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 05:11:00,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:00,912 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] [2020-11-07 05:11:00,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 05:11:00,913 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:00,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:00,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1593424501, now seen corresponding path program 1 times [2020-11-07 05:11:00,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:00,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975972169] [2020-11-07 05:11:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:00,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:00,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975972169] [2020-11-07 05:11:00,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:00,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:00,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855657725] [2020-11-07 05:11:00,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:00,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:00,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:00,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:00,998 INFO L87 Difference]: Start difference. First operand 2092 states and 2859 transitions. Second operand 4 states. [2020-11-07 05:11:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:01,865 INFO L93 Difference]: Finished difference Result 2560 states and 3534 transitions. [2020-11-07 05:11:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:01,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-11-07 05:11:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:01,879 INFO L225 Difference]: With dead ends: 2560 [2020-11-07 05:11:01,880 INFO L226 Difference]: Without dead ends: 2557 [2020-11-07 05:11:01,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2020-11-07 05:11:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2092. [2020-11-07 05:11:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-11-07 05:11:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2843 transitions. [2020-11-07 05:11:02,249 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2843 transitions. Word has length 92 [2020-11-07 05:11:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:02,250 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2843 transitions. [2020-11-07 05:11:02,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2843 transitions. [2020-11-07 05:11:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-07 05:11:02,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:02,258 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] [2020-11-07 05:11:02,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 05:11:02,259 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash 132646847, now seen corresponding path program 1 times [2020-11-07 05:11:02,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:02,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835914712] [2020-11-07 05:11:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:02,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835914712] [2020-11-07 05:11:02,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:02,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:02,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089431107] [2020-11-07 05:11:02,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:02,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:02,342 INFO L87 Difference]: Start difference. First operand 2092 states and 2843 transitions. Second operand 4 states. [2020-11-07 05:11:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:03,130 INFO L93 Difference]: Finished difference Result 2544 states and 3486 transitions. [2020-11-07 05:11:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:03,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-11-07 05:11:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:03,145 INFO L225 Difference]: With dead ends: 2544 [2020-11-07 05:11:03,146 INFO L226 Difference]: Without dead ends: 2541 [2020-11-07 05:11:03,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2020-11-07 05:11:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2092. [2020-11-07 05:11:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-11-07 05:11:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2827 transitions. [2020-11-07 05:11:03,534 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2827 transitions. Word has length 93 [2020-11-07 05:11:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:03,535 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2827 transitions. [2020-11-07 05:11:03,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2827 transitions. [2020-11-07 05:11:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-07 05:11:03,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:03,538 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] [2020-11-07 05:11:03,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 05:11:03,539 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash -540047414, now seen corresponding path program 1 times [2020-11-07 05:11:03,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:03,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098975757] [2020-11-07 05:11:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:03,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:03,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098975757] [2020-11-07 05:11:03,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:03,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:03,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663585951] [2020-11-07 05:11:03,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:03,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:03,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:03,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:03,629 INFO L87 Difference]: Start difference. First operand 2092 states and 2827 transitions. Second operand 4 states. [2020-11-07 05:11:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:04,544 INFO L93 Difference]: Finished difference Result 6064 states and 8238 transitions. [2020-11-07 05:11:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:04,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-11-07 05:11:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:04,571 INFO L225 Difference]: With dead ends: 6064 [2020-11-07 05:11:04,571 INFO L226 Difference]: Without dead ends: 4029 [2020-11-07 05:11:04,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:04,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2020-11-07 05:11:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4028. [2020-11-07 05:11:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4028 states. [2020-11-07 05:11:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 5403 transitions. [2020-11-07 05:11:05,283 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 5403 transitions. Word has length 93 [2020-11-07 05:11:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:05,283 INFO L481 AbstractCegarLoop]: Abstraction has 4028 states and 5403 transitions. [2020-11-07 05:11:05,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 5403 transitions. [2020-11-07 05:11:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-07 05:11:05,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:05,289 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] [2020-11-07 05:11:05,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 05:11:05,289 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:05,290 INFO L82 PathProgramCache]: Analyzing trace with hash 446000829, now seen corresponding path program 1 times [2020-11-07 05:11:05,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:05,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117423271] [2020-11-07 05:11:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:05,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:05,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117423271] [2020-11-07 05:11:05,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:05,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:05,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735986741] [2020-11-07 05:11:05,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:05,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:05,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:05,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:05,384 INFO L87 Difference]: Start difference. First operand 4028 states and 5403 transitions. Second operand 4 states. [2020-11-07 05:11:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:06,570 INFO L93 Difference]: Finished difference Result 11776 states and 15838 transitions. [2020-11-07 05:11:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:06,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-11-07 05:11:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:06,612 INFO L225 Difference]: With dead ends: 11776 [2020-11-07 05:11:06,612 INFO L226 Difference]: Without dead ends: 7805 [2020-11-07 05:11:06,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-11-07 05:11:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7804. [2020-11-07 05:11:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-11-07 05:11:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10363 transitions. [2020-11-07 05:11:07,979 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10363 transitions. Word has length 94 [2020-11-07 05:11:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:07,980 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10363 transitions. [2020-11-07 05:11:07,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10363 transitions. [2020-11-07 05:11:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-07 05:11:07,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:07,988 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] [2020-11-07 05:11:07,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 05:11:07,988 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:07,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2101262615, now seen corresponding path program 1 times [2020-11-07 05:11:07,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:07,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287293827] [2020-11-07 05:11:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:08,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:08,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287293827] [2020-11-07 05:11:08,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:08,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:08,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340022637] [2020-11-07 05:11:08,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:08,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:08,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:08,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:08,072 INFO L87 Difference]: Start difference. First operand 7804 states and 10363 transitions. Second operand 4 states. [2020-11-07 05:11:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:09,775 INFO L93 Difference]: Finished difference Result 9408 states and 12542 transitions. [2020-11-07 05:11:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:09,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-11-07 05:11:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:09,824 INFO L225 Difference]: With dead ends: 9408 [2020-11-07 05:11:09,824 INFO L226 Difference]: Without dead ends: 9405 [2020-11-07 05:11:09,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9405 states. [2020-11-07 05:11:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9405 to 7804. [2020-11-07 05:11:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-11-07 05:11:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10299 transitions. [2020-11-07 05:11:10,718 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10299 transitions. Word has length 94 [2020-11-07 05:11:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:10,719 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10299 transitions. [2020-11-07 05:11:10,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10299 transitions. [2020-11-07 05:11:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 05:11:10,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:10,727 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] [2020-11-07 05:11:10,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 05:11:10,728 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:10,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1296146485, now seen corresponding path program 1 times [2020-11-07 05:11:10,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:10,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512003830] [2020-11-07 05:11:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:10,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:10,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512003830] [2020-11-07 05:11:10,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:10,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696051785] [2020-11-07 05:11:10,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:10,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:10,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:10,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:10,795 INFO L87 Difference]: Start difference. First operand 7804 states and 10299 transitions. Second operand 4 states. [2020-11-07 05:11:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:11,994 INFO L93 Difference]: Finished difference Result 9344 states and 12350 transitions. [2020-11-07 05:11:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:11,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-11-07 05:11:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:12,017 INFO L225 Difference]: With dead ends: 9344 [2020-11-07 05:11:12,017 INFO L226 Difference]: Without dead ends: 9341 [2020-11-07 05:11:12,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2020-11-07 05:11:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7804. [2020-11-07 05:11:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-11-07 05:11:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10235 transitions. [2020-11-07 05:11:12,893 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10235 transitions. Word has length 95 [2020-11-07 05:11:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:12,893 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10235 transitions. [2020-11-07 05:11:12,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10235 transitions. [2020-11-07 05:11:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 05:11:12,900 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:12,900 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] [2020-11-07 05:11:12,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 05:11:12,901 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash 948736822, now seen corresponding path program 1 times [2020-11-07 05:11:12,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:12,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662809656] [2020-11-07 05:11:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:12,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:12,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662809656] [2020-11-07 05:11:12,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:12,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168988960] [2020-11-07 05:11:12,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:12,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:12,958 INFO L87 Difference]: Start difference. First operand 7804 states and 10235 transitions. Second operand 4 states. [2020-11-07 05:11:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:15,440 INFO L93 Difference]: Finished difference Result 22912 states and 30078 transitions. [2020-11-07 05:11:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:15,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-11-07 05:11:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:15,479 INFO L225 Difference]: With dead ends: 22912 [2020-11-07 05:11:15,479 INFO L226 Difference]: Without dead ends: 15165 [2020-11-07 05:11:15,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2020-11-07 05:11:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 15164. [2020-11-07 05:11:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15164 states. [2020-11-07 05:11:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15164 states to 15164 states and 19643 transitions. [2020-11-07 05:11:17,243 INFO L78 Accepts]: Start accepts. Automaton has 15164 states and 19643 transitions. Word has length 95 [2020-11-07 05:11:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:17,244 INFO L481 AbstractCegarLoop]: Abstraction has 15164 states and 19643 transitions. [2020-11-07 05:11:17,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 15164 states and 19643 transitions. [2020-11-07 05:11:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-07 05:11:17,254 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:17,254 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] [2020-11-07 05:11:17,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 05:11:17,255 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:17,256 INFO L82 PathProgramCache]: Analyzing trace with hash 758365347, now seen corresponding path program 1 times [2020-11-07 05:11:17,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:17,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583984007] [2020-11-07 05:11:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:17,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:17,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583984007] [2020-11-07 05:11:17,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:17,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:17,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315003556] [2020-11-07 05:11:17,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:17,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:17,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:17,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:17,321 INFO L87 Difference]: Start difference. First operand 15164 states and 19643 transitions. Second operand 4 states. [2020-11-07 05:11:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:19,428 INFO L93 Difference]: Finished difference Result 17984 states and 23230 transitions. [2020-11-07 05:11:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:19,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-11-07 05:11:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:19,478 INFO L225 Difference]: With dead ends: 17984 [2020-11-07 05:11:19,478 INFO L226 Difference]: Without dead ends: 17981 [2020-11-07 05:11:19,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17981 states. [2020-11-07 05:11:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17981 to 15164. [2020-11-07 05:11:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15164 states. [2020-11-07 05:11:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15164 states to 15164 states and 19515 transitions. [2020-11-07 05:11:21,765 INFO L78 Accepts]: Start accepts. Automaton has 15164 states and 19515 transitions. Word has length 96 [2020-11-07 05:11:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:21,766 INFO L481 AbstractCegarLoop]: Abstraction has 15164 states and 19515 transitions. [2020-11-07 05:11:21,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 15164 states and 19515 transitions. [2020-11-07 05:11:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-07 05:11:21,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:21,777 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] [2020-11-07 05:11:21,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 05:11:21,777 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:21,778 INFO L82 PathProgramCache]: Analyzing trace with hash -646305047, now seen corresponding path program 1 times [2020-11-07 05:11:21,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:21,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221362037] [2020-11-07 05:11:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:21,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:21,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221362037] [2020-11-07 05:11:21,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:21,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:21,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319268808] [2020-11-07 05:11:21,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:21,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:21,843 INFO L87 Difference]: Start difference. First operand 15164 states and 19515 transitions. Second operand 4 states. [2020-11-07 05:11:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:25,380 INFO L93 Difference]: Finished difference Result 44608 states and 57406 transitions. [2020-11-07 05:11:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:25,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-11-07 05:11:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:25,462 INFO L225 Difference]: With dead ends: 44608 [2020-11-07 05:11:25,462 INFO L226 Difference]: Without dead ends: 29501 [2020-11-07 05:11:25,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2020-11-07 05:11:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 29500. [2020-11-07 05:11:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29500 states. [2020-11-07 05:11:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29500 states to 29500 states and 37435 transitions. [2020-11-07 05:11:29,506 INFO L78 Accepts]: Start accepts. Automaton has 29500 states and 37435 transitions. Word has length 96 [2020-11-07 05:11:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:29,506 INFO L481 AbstractCegarLoop]: Abstraction has 29500 states and 37435 transitions. [2020-11-07 05:11:29,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 29500 states and 37435 transitions. [2020-11-07 05:11:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 05:11:29,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:29,528 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] [2020-11-07 05:11:29,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 05:11:29,529 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash 23734231, now seen corresponding path program 1 times [2020-11-07 05:11:29,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:29,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521728463] [2020-11-07 05:11:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:29,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:29,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521728463] [2020-11-07 05:11:29,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:29,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:29,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99615280] [2020-11-07 05:11:29,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:29,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:29,602 INFO L87 Difference]: Start difference. First operand 29500 states and 37435 transitions. Second operand 4 states. [2020-11-07 05:11:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:33,974 INFO L93 Difference]: Finished difference Result 34624 states and 43582 transitions. [2020-11-07 05:11:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:33,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-11-07 05:11:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:34,043 INFO L225 Difference]: With dead ends: 34624 [2020-11-07 05:11:34,043 INFO L226 Difference]: Without dead ends: 34621 [2020-11-07 05:11:34,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2020-11-07 05:11:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 29500. [2020-11-07 05:11:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29500 states. [2020-11-07 05:11:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29500 states to 29500 states and 37179 transitions. [2020-11-07 05:11:38,348 INFO L78 Accepts]: Start accepts. Automaton has 29500 states and 37179 transitions. Word has length 97 [2020-11-07 05:11:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:38,349 INFO L481 AbstractCegarLoop]: Abstraction has 29500 states and 37179 transitions. [2020-11-07 05:11:38,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 29500 states and 37179 transitions. [2020-11-07 05:11:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 05:11:38,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:38,365 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] [2020-11-07 05:11:38,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 05:11:38,366 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1447016098, now seen corresponding path program 1 times [2020-11-07 05:11:38,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:38,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476050708] [2020-11-07 05:11:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:38,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:38,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476050708] [2020-11-07 05:11:38,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:38,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:38,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645639344] [2020-11-07 05:11:38,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:38,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:38,444 INFO L87 Difference]: Start difference. First operand 29500 states and 37179 transitions. Second operand 4 states. [2020-11-07 05:11:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:11:45,866 INFO L93 Difference]: Finished difference Result 86848 states and 109374 transitions. [2020-11-07 05:11:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:11:45,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-11-07 05:11:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:11:45,971 INFO L225 Difference]: With dead ends: 86848 [2020-11-07 05:11:45,971 INFO L226 Difference]: Without dead ends: 57405 [2020-11-07 05:11:46,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:11:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57405 states. [2020-11-07 05:11:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57405 to 57404. [2020-11-07 05:11:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-11-07 05:11:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 71227 transitions. [2020-11-07 05:11:53,580 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 71227 transitions. Word has length 97 [2020-11-07 05:11:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:11:53,580 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 71227 transitions. [2020-11-07 05:11:53,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:11:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 71227 transitions. [2020-11-07 05:11:53,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-07 05:11:53,604 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:11:53,604 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] [2020-11-07 05:11:53,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 05:11:53,605 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:11:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:11:53,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1274982353, now seen corresponding path program 1 times [2020-11-07 05:11:53,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:11:53,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761788831] [2020-11-07 05:11:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:11:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:53,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:11:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:11:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:11:53,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761788831] [2020-11-07 05:11:53,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:11:53,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:11:53,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833306918] [2020-11-07 05:11:53,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:11:53,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:11:53,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:11:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:11:53,670 INFO L87 Difference]: Start difference. First operand 57404 states and 71227 transitions. Second operand 4 states. [2020-11-07 05:12:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:12:01,821 INFO L93 Difference]: Finished difference Result 66624 states and 81470 transitions. [2020-11-07 05:12:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:12:01,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-11-07 05:12:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:12:01,931 INFO L225 Difference]: With dead ends: 66624 [2020-11-07 05:12:01,931 INFO L226 Difference]: Without dead ends: 66621 [2020-11-07 05:12:01,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:12:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66621 states. [2020-11-07 05:12:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66621 to 57404. [2020-11-07 05:12:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-11-07 05:12:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 70715 transitions. [2020-11-07 05:12:09,379 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 70715 transitions. Word has length 98 [2020-11-07 05:12:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:12:09,380 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 70715 transitions. [2020-11-07 05:12:09,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:12:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 70715 transitions. [2020-11-07 05:12:09,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-07 05:12:09,400 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:12:09,400 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] [2020-11-07 05:12:09,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 05:12:09,401 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:12:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:12:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1915473685, now seen corresponding path program 1 times [2020-11-07 05:12:09,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:12:09,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817806428] [2020-11-07 05:12:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:12:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:12:09,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:12:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:12:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:12:09,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817806428] [2020-11-07 05:12:09,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:12:09,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:12:09,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285833688] [2020-11-07 05:12:09,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:12:09,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:12:09,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:12:09,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:12:09,707 INFO L87 Difference]: Start difference. First operand 57404 states and 70715 transitions. Second operand 4 states. [2020-11-07 05:12:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:12:23,573 INFO L93 Difference]: Finished difference Result 169023 states and 207933 transitions. [2020-11-07 05:12:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:12:23,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-11-07 05:12:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:12:23,661 INFO L225 Difference]: With dead ends: 169023 [2020-11-07 05:12:23,661 INFO L226 Difference]: Without dead ends: 57404 [2020-11-07 05:12:23,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:12:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57404 states. [2020-11-07 05:12:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57404 to 57404. [2020-11-07 05:12:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-11-07 05:12:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 68667 transitions. [2020-11-07 05:12:30,699 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 68667 transitions. Word has length 98 [2020-11-07 05:12:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:12:30,699 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 68667 transitions. [2020-11-07 05:12:30,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:12:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 68667 transitions. [2020-11-07 05:12:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-07 05:12:30,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:12:30,716 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] [2020-11-07 05:12:30,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 05:12:30,716 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:12:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:12:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1414488035, now seen corresponding path program 1 times [2020-11-07 05:12:30,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:12:30,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239960463] [2020-11-07 05:12:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:12:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:12:30,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:12:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:12:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:12:30,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239960463] [2020-11-07 05:12:30,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:12:30,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:12:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944398197] [2020-11-07 05:12:30,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:12:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:12:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:12:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:12:30,776 INFO L87 Difference]: Start difference. First operand 57404 states and 68667 transitions. Second operand 4 states. [2020-11-07 05:12:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:12:37,896 INFO L93 Difference]: Finished difference Result 57404 states and 68667 transitions. [2020-11-07 05:12:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:12:37,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-11-07 05:12:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:12:37,897 INFO L225 Difference]: With dead ends: 57404 [2020-11-07 05:12:37,897 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 05:12:37,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:12:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 05:12:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 05:12:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 05:12:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 05:12:37,965 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2020-11-07 05:12:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:12:37,965 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 05:12:37,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:12:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 05:12:37,966 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 05:12:37,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 05:12:37,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 05:12:58,171 WARN L194 SmtUtils]: Spent 20.07 s on a formula simplification. DAG size of input: 4288 DAG size of output: 34 [2020-11-07 05:13:02,626 WARN L194 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2020-11-07 05:14:01,569 WARN L194 SmtUtils]: Spent 58.93 s on a formula simplification that was a NOOP. DAG size: 2125 [2020-11-07 05:14:19,331 WARN L194 SmtUtils]: Spent 17.75 s on a formula simplification. DAG size of input: 2134 DAG size of output: 581 [2020-11-07 05:14:21,874 WARN L194 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2020-11-07 05:14:24,702 WARN L194 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 1120 DAG size of output: 191 [2020-11-07 05:14:26,492 WARN L194 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2020-11-07 05:14:30,515 WARN L194 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 2107 DAG size of output: 45 [2020-11-07 05:15:18,227 WARN L194 SmtUtils]: Spent 47.69 s on a formula simplification. DAG size of input: 5285 DAG size of output: 31 [2020-11-07 05:15:25,970 WARN L194 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2020-11-07 05:15:35,631 WARN L194 SmtUtils]: Spent 9.65 s on a formula simplification. DAG size of input: 3010 DAG size of output: 53 [2020-11-07 05:15:51,155 WARN L194 SmtUtils]: Spent 15.52 s on a formula simplification that was a NOOP. DAG size: 1099 [2020-11-07 05:16:06,659 WARN L194 SmtUtils]: Spent 15.49 s on a formula simplification. DAG size of input: 2752 DAG size of output: 41 [2020-11-07 05:16:11,079 WARN L194 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 2111 DAG size of output: 65 [2020-11-07 05:16:42,992 WARN L194 SmtUtils]: Spent 31.90 s on a formula simplification. DAG size of input: 4797 DAG size of output: 31 [2020-11-07 05:16:44,025 WARN L194 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2020-11-07 05:16:54,362 WARN L194 SmtUtils]: Spent 10.32 s on a formula simplification. DAG size of input: 2146 DAG size of output: 321 [2020-11-07 05:16:56,378 WARN L194 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 1144 DAG size of output: 123 [2020-11-07 05:16:58,236 WARN L194 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2020-11-07 05:17:55,544 WARN L194 SmtUtils]: Spent 57.28 s on a formula simplification. DAG size of input: 5312 DAG size of output: 31 [2020-11-07 05:18:01,018 WARN L194 SmtUtils]: Spent 5.47 s on a formula simplification. DAG size of input: 2115 DAG size of output: 121 [2020-11-07 05:18:02,071 WARN L194 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2020-11-07 05:18:21,876 WARN L194 SmtUtils]: Spent 19.79 s on a formula simplification. DAG size of input: 3778 DAG size of output: 45 [2020-11-07 05:18:29,859 WARN L194 SmtUtils]: Spent 7.98 s on a formula simplification. DAG size of input: 1102 DAG size of output: 583 [2020-11-07 05:18:46,864 WARN L194 SmtUtils]: Spent 16.99 s on a formula simplification. DAG size of input: 4288 DAG size of output: 34 [2020-11-07 05:19:44,491 WARN L194 SmtUtils]: Spent 57.60 s on a formula simplification. DAG size of input: 5312 DAG size of output: 31 [2020-11-07 05:20:29,876 WARN L194 SmtUtils]: Spent 45.37 s on a formula simplification. DAG size of input: 5235 DAG size of output: 31 [2020-11-07 05:20:40,299 WARN L194 SmtUtils]: Spent 10.41 s on a formula simplification. DAG size of input: 2119 DAG size of output: 321 [2020-11-07 05:20:41,509 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2020-11-07 05:20:48,813 WARN L194 SmtUtils]: Spent 7.30 s on a formula simplification. DAG size of input: 2194 DAG size of output: 189 [2020-11-07 05:20:50,588 WARN L194 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2020-11-07 05:20:53,628 WARN L194 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 1600 DAG size of output: 55 [2020-11-07 05:21:19,070 WARN L194 SmtUtils]: Spent 25.41 s on a formula simplification. DAG size of input: 4411 DAG size of output: 31 [2020-11-07 05:21:49,247 WARN L194 SmtUtils]: Spent 30.17 s on a formula simplification. DAG size of input: 2123 DAG size of output: 1097 [2020-11-07 05:21:50,973 WARN L194 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2020-11-07 05:22:06,206 WARN L194 SmtUtils]: Spent 15.23 s on a formula simplification that was a NOOP. DAG size: 1099 [2020-11-07 05:23:05,492 WARN L194 SmtUtils]: Spent 59.27 s on a formula simplification. DAG size of input: 5314 DAG size of output: 39 [2020-11-07 05:23:10,005 WARN L194 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 1108 DAG size of output: 323 [2020-11-07 05:23:13,974 WARN L194 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 2105 DAG size of output: 39 [2020-11-07 05:24:06,198 WARN L194 SmtUtils]: Spent 52.21 s on a formula simplification. DAG size of input: 5307 DAG size of output: 31 [2020-11-07 05:24:10,009 WARN L194 SmtUtils]: Spent 3.80 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2020-11-07 05:24:16,112 WARN L194 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 2242 DAG size of output: 121 [2020-11-07 05:24:20,359 WARN L194 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 1093 DAG size of output: 321 [2020-11-07 05:24:22,258 WARN L194 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2020-11-07 05:24:27,994 WARN L194 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 1984 DAG size of output: 47 [2020-11-07 05:24:32,274 WARN L194 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 2109 DAG size of output: 53