/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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:25:06,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:25:06,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:25:06,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:25:06,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:25:06,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:25:06,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:25:06,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:25:06,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:25:06,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:25:06,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:25:06,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:25:06,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:25:06,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:25:06,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:25:06,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:25:06,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:25:06,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:25:06,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:25:06,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:25:06,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:25:06,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:25:06,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:25:06,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:25:06,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 02:25:06,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 02:25:06,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 02:25:06,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 02:25:06,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 02:25:06,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 02:25:06,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 02:25:06,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 02:25:06,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 02:25:06,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 02:25:06,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 02:25:06,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 02:25:06,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 02:25:06,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 02:25:06,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:25:06,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:25:06,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:25:06,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:25:06,535 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:25:06,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:25:06,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:25:06,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:25:06,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:25:06,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:25:06,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:25:06,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:25:06,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:25:06,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:25:06,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:25:06,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:25:06,543 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:25:06,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:25:06,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:25:06,544 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:25:06,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:25:06,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:25:06,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:06,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:25:06,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:25:06,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:25:06,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:25:06,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:25:07,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:25:07,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:25:07,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:25:07,024 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:25:07,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-10-24 02:25:07,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46753fb7d/26790af59d6a4118957f3723032641b1/FLAG3f17cb742 [2020-10-24 02:25:07,965 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:25:07,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-10-24 02:25:07,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46753fb7d/26790af59d6a4118957f3723032641b1/FLAG3f17cb742 [2020-10-24 02:25:07,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46753fb7d/26790af59d6a4118957f3723032641b1 [2020-10-24 02:25:08,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:25:08,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:25:08,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:08,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:25:08,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:25:08,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:07" (1/1) ... [2020-10-24 02:25:08,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f0d76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08, skipping insertion in model container [2020-10-24 02:25:08,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:07" (1/1) ... [2020-10-24 02:25:08,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:25:08,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:25:08,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:08,329 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:25:08,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:08,370 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:25:08,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08 WrapperNode [2020-10-24 02:25:08,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:08,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:25:08,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:25:08,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:25:08,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:25:08,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:25:08,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:25:08,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:25:08,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (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 [2020-10-24 02:25:08,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:25:08,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:25:08,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:25:08,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:25:08,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:25:08,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:25:08,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:25:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:25:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:25:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:25:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:25:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:25:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:25:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:25:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:25:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:25:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:25:08,754 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:25:08,755 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:25:08,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:08 BoogieIcfgContainer [2020-10-24 02:25:08,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:25:08,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:25:08,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:25:08,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:25:08,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:25:07" (1/3) ... [2020-10-24 02:25:08,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76394fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:08, skipping insertion in model container [2020-10-24 02:25:08,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (2/3) ... [2020-10-24 02:25:08,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76394fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:08, skipping insertion in model container [2020-10-24 02:25:08,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:08" (3/3) ... [2020-10-24 02:25:08,804 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-10-24 02:25:08,850 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:25:08,862 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:25:08,885 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:25:08,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:25:08,916 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:25:08,916 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:25:08,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:25:08,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:25:08,916 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:25:08,917 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:25:08,917 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:25:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-24 02:25:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-24 02:25:08,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:08,965 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] [2020-10-24 02:25:08,965 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:08,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1359326843, now seen corresponding path program 1 times [2020-10-24 02:25:08,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:09,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557955280] [2020-10-24 02:25:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:09,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:09,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557955280] [2020-10-24 02:25:09,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:09,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:25:09,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448541477] [2020-10-24 02:25:09,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:25:09,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:25:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:25:09,535 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-24 02:25:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:09,675 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-24 02:25:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:25:09,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-24 02:25:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:09,687 INFO L225 Difference]: With dead ends: 55 [2020-10-24 02:25:09,688 INFO L226 Difference]: Without dead ends: 27 [2020-10-24 02:25:09,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:25:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-24 02:25:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-24 02:25:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 02:25:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-24 02:25:09,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2020-10-24 02:25:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:09,737 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-24 02:25:09,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:25:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-24 02:25:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-24 02:25:09,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:09,739 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] [2020-10-24 02:25:09,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:25:09,740 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:09,741 INFO L82 PathProgramCache]: Analyzing trace with hash -756925380, now seen corresponding path program 1 times [2020-10-24 02:25:09,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:09,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833713562] [2020-10-24 02:25:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:09,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:09,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833713562] [2020-10-24 02:25:09,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:09,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:25:09,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393854429] [2020-10-24 02:25:09,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:25:09,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:09,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:25:09,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:25:09,876 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 4 states. [2020-10-24 02:25:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,003 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-24 02:25:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:25:10,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-24 02:25:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,005 INFO L225 Difference]: With dead ends: 38 [2020-10-24 02:25:10,005 INFO L226 Difference]: Without dead ends: 31 [2020-10-24 02:25:10,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:25:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-24 02:25:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-24 02:25:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 02:25:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-24 02:25:10,017 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-10-24 02:25:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,017 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-24 02:25:10,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:25:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-24 02:25:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-24 02:25:10,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,019 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] [2020-10-24 02:25:10,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:25:10,019 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1456501324, now seen corresponding path program 1 times [2020-10-24 02:25:10,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071293526] [2020-10-24 02:25:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:10,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071293526] [2020-10-24 02:25:10,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:10,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:25:10,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53094982] [2020-10-24 02:25:10,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:25:10,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:25:10,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:25:10,130 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2020-10-24 02:25:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,238 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-24 02:25:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:25:10,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-24 02:25:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,240 INFO L225 Difference]: With dead ends: 43 [2020-10-24 02:25:10,241 INFO L226 Difference]: Without dead ends: 36 [2020-10-24 02:25:10,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:25:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-24 02:25:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-24 02:25:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-24 02:25:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-24 02:25:10,252 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-10-24 02:25:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,252 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-24 02:25:10,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:25:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-24 02:25:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 02:25:10,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:10,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:25:10,254 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1068341444, now seen corresponding path program 2 times [2020-10-24 02:25:10,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421991768] [2020-10-24 02:25:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:10,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421991768] [2020-10-24 02:25:10,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:10,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:25:10,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454425408] [2020-10-24 02:25:10,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:25:10,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:25:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:25:10,434 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2020-10-24 02:25:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,605 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-24 02:25:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:25:10,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-24 02:25:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,608 INFO L225 Difference]: With dead ends: 48 [2020-10-24 02:25:10,608 INFO L226 Difference]: Without dead ends: 41 [2020-10-24 02:25:10,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:25:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-24 02:25:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-24 02:25:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-24 02:25:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-24 02:25:10,618 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-10-24 02:25:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,619 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-24 02:25:10,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:25:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-24 02:25:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-24 02:25:10,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:10,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:25:10,621 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,622 INFO L82 PathProgramCache]: Analyzing trace with hash 35799732, now seen corresponding path program 3 times [2020-10-24 02:25:10,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063582536] [2020-10-24 02:25:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:10,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063582536] [2020-10-24 02:25:10,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:10,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:25:10,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496063248] [2020-10-24 02:25:10,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:25:10,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:25:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:25:10,795 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-10-24 02:25:11,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:11,011 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-24 02:25:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:25:11,012 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-24 02:25:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:11,015 INFO L225 Difference]: With dead ends: 53 [2020-10-24 02:25:11,015 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 02:25:11,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:25:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 02:25:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-24 02:25:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-24 02:25:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-24 02:25:11,032 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-10-24 02:25:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:11,032 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-24 02:25:11,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:25:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-24 02:25:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 02:25:11,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:11,034 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:11,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:25:11,035 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:11,035 INFO L82 PathProgramCache]: Analyzing trace with hash 197710396, now seen corresponding path program 4 times [2020-10-24 02:25:11,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:11,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250508070] [2020-10-24 02:25:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250508070] [2020-10-24 02:25:11,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:11,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:25:11,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135440240] [2020-10-24 02:25:11,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:25:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:25:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:25:11,202 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2020-10-24 02:25:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:11,444 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-24 02:25:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:25:11,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-24 02:25:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:11,446 INFO L225 Difference]: With dead ends: 58 [2020-10-24 02:25:11,446 INFO L226 Difference]: Without dead ends: 51 [2020-10-24 02:25:11,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:25:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-24 02:25:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-24 02:25:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-24 02:25:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-24 02:25:11,456 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-10-24 02:25:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:11,457 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-24 02:25:11,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:25:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-24 02:25:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 02:25:11,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:11,459 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:11,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:25:11,459 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:11,460 INFO L82 PathProgramCache]: Analyzing trace with hash 116832180, now seen corresponding path program 5 times [2020-10-24 02:25:11,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:11,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492909216] [2020-10-24 02:25:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:11,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492909216] [2020-10-24 02:25:11,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:11,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:25:11,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638350644] [2020-10-24 02:25:11,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:25:11,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:25:11,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:25:11,657 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 14 states. [2020-10-24 02:25:12,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:12,030 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-24 02:25:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:25:12,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-24 02:25:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:12,032 INFO L225 Difference]: With dead ends: 63 [2020-10-24 02:25:12,032 INFO L226 Difference]: Without dead ends: 56 [2020-10-24 02:25:12,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:25:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-24 02:25:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-24 02:25:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 02:25:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-24 02:25:12,051 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-10-24 02:25:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:12,051 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-24 02:25:12,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:25:12,052 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-24 02:25:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-24 02:25:12,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:12,056 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:12,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:25:12,056 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:12,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1837793988, now seen corresponding path program 6 times [2020-10-24 02:25:12,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:12,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866618948] [2020-10-24 02:25:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:12,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866618948] [2020-10-24 02:25:12,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:25:12,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927965224] [2020-10-24 02:25:12,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:25:12,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:25:12,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:25:12,349 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 16 states. [2020-10-24 02:25:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:12,665 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-24 02:25:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:25:12,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-24 02:25:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:12,667 INFO L225 Difference]: With dead ends: 68 [2020-10-24 02:25:12,667 INFO L226 Difference]: Without dead ends: 61 [2020-10-24 02:25:12,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:25:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-24 02:25:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-24 02:25:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-24 02:25:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-24 02:25:12,678 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-10-24 02:25:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:12,679 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-24 02:25:12,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:25:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-24 02:25:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-24 02:25:12,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:12,680 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:12,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:25:12,681 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1736643404, now seen corresponding path program 7 times [2020-10-24 02:25:12,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:12,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534193249] [2020-10-24 02:25:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:12,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534193249] [2020-10-24 02:25:12,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:25:12,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792784368] [2020-10-24 02:25:12,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:25:12,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:25:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:25:12,968 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 18 states. [2020-10-24 02:25:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:13,397 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-24 02:25:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:25:13,397 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-24 02:25:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:13,399 INFO L225 Difference]: With dead ends: 73 [2020-10-24 02:25:13,399 INFO L226 Difference]: Without dead ends: 66 [2020-10-24 02:25:13,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:25:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-24 02:25:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-24 02:25:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-24 02:25:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-24 02:25:13,410 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2020-10-24 02:25:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:13,411 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-24 02:25:13,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:25:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-24 02:25:13,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-24 02:25:13,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:13,412 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:13,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:25:13,412 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1971873852, now seen corresponding path program 8 times [2020-10-24 02:25:13,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:13,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125119165] [2020-10-24 02:25:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:13,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125119165] [2020-10-24 02:25:13,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:13,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:25:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586201311] [2020-10-24 02:25:13,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:25:13,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:13,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:25:13,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:25:13,706 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 20 states. [2020-10-24 02:25:14,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:14,219 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-24 02:25:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 02:25:14,220 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-24 02:25:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:14,221 INFO L225 Difference]: With dead ends: 78 [2020-10-24 02:25:14,221 INFO L226 Difference]: Without dead ends: 71 [2020-10-24 02:25:14,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:25:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-24 02:25:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-24 02:25:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-24 02:25:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-24 02:25:14,236 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2020-10-24 02:25:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:14,237 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-24 02:25:14,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:25:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-24 02:25:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-24 02:25:14,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:14,239 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:14,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:25:14,239 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:14,240 INFO L82 PathProgramCache]: Analyzing trace with hash -746266188, now seen corresponding path program 9 times [2020-10-24 02:25:14,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:14,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38627043] [2020-10-24 02:25:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:14,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:14,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38627043] [2020-10-24 02:25:14,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:14,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:25:14,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452649556] [2020-10-24 02:25:14,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:25:14,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:14,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:25:14,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:25:14,592 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 22 states. [2020-10-24 02:25:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:15,098 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-10-24 02:25:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-24 02:25:15,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-24 02:25:15,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:15,100 INFO L225 Difference]: With dead ends: 83 [2020-10-24 02:25:15,100 INFO L226 Difference]: Without dead ends: 76 [2020-10-24 02:25:15,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:25:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-24 02:25:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-24 02:25:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-24 02:25:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-24 02:25:15,112 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2020-10-24 02:25:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:15,112 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-24 02:25:15,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:25:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-24 02:25:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-24 02:25:15,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:15,113 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:15,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:25:15,114 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash 439456572, now seen corresponding path program 10 times [2020-10-24 02:25:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:15,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795904611] [2020-10-24 02:25:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:15,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:15,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795904611] [2020-10-24 02:25:15,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:15,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:25:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706584987] [2020-10-24 02:25:15,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:25:15,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:15,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:25:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:25:15,536 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 24 states. [2020-10-24 02:25:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:16,118 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-24 02:25:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 02:25:16,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2020-10-24 02:25:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:16,119 INFO L225 Difference]: With dead ends: 88 [2020-10-24 02:25:16,119 INFO L226 Difference]: Without dead ends: 81 [2020-10-24 02:25:16,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:25:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-24 02:25:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-24 02:25:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-24 02:25:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-24 02:25:16,138 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2020-10-24 02:25:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:16,139 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-24 02:25:16,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:25:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-24 02:25:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-24 02:25:16,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:16,145 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:16,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:25:16,145 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:16,146 INFO L82 PathProgramCache]: Analyzing trace with hash 283023028, now seen corresponding path program 11 times [2020-10-24 02:25:16,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:16,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372374061] [2020-10-24 02:25:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:16,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:16,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372374061] [2020-10-24 02:25:16,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:16,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:25:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099360076] [2020-10-24 02:25:16,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:25:16,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:16,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:25:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:25:16,628 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 26 states. [2020-10-24 02:25:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:17,377 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-10-24 02:25:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-24 02:25:17,378 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-10-24 02:25:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:17,379 INFO L225 Difference]: With dead ends: 93 [2020-10-24 02:25:17,379 INFO L226 Difference]: Without dead ends: 86 [2020-10-24 02:25:17,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:25:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-24 02:25:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-24 02:25:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 02:25:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-24 02:25:17,390 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2020-10-24 02:25:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:17,390 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-24 02:25:17,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:25:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-24 02:25:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-24 02:25:17,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:17,391 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:17,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:25:17,392 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:17,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:17,392 INFO L82 PathProgramCache]: Analyzing trace with hash 698416700, now seen corresponding path program 12 times [2020-10-24 02:25:17,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:17,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4879994] [2020-10-24 02:25:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:17,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:17,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4879994] [2020-10-24 02:25:17,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:17,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:25:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485165261] [2020-10-24 02:25:17,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:25:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:25:17,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:25:17,951 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2020-10-24 02:25:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:18,729 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-24 02:25:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 02:25:18,730 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2020-10-24 02:25:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:18,731 INFO L225 Difference]: With dead ends: 98 [2020-10-24 02:25:18,731 INFO L226 Difference]: Without dead ends: 91 [2020-10-24 02:25:18,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:25:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-24 02:25:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-10-24 02:25:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 02:25:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-24 02:25:18,743 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2020-10-24 02:25:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:18,743 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-24 02:25:18,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:25:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-24 02:25:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-24 02:25:18,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:18,745 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:18,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:25:18,745 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash -447083596, now seen corresponding path program 13 times [2020-10-24 02:25:18,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:18,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770839631] [2020-10-24 02:25:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:19,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770839631] [2020-10-24 02:25:19,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:19,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:25:19,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534277733] [2020-10-24 02:25:19,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:25:19,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:19,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:25:19,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:25:19,301 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 30 states. [2020-10-24 02:25:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:20,236 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-10-24 02:25:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-24 02:25:20,236 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-10-24 02:25:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:20,238 INFO L225 Difference]: With dead ends: 103 [2020-10-24 02:25:20,238 INFO L226 Difference]: Without dead ends: 96 [2020-10-24 02:25:20,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:25:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-24 02:25:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-10-24 02:25:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 02:25:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-24 02:25:20,251 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2020-10-24 02:25:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:20,251 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-24 02:25:20,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:25:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-24 02:25:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-24 02:25:20,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:20,252 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:20,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:25:20,254 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:20,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1861834436, now seen corresponding path program 14 times [2020-10-24 02:25:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:20,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703162547] [2020-10-24 02:25:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:20,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:20,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703162547] [2020-10-24 02:25:21,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:21,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:25:21,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403348690] [2020-10-24 02:25:21,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:25:21,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:25:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:25:21,006 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 32 states. [2020-10-24 02:25:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:22,057 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-24 02:25:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-24 02:25:22,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-10-24 02:25:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:22,060 INFO L225 Difference]: With dead ends: 108 [2020-10-24 02:25:22,060 INFO L226 Difference]: Without dead ends: 101 [2020-10-24 02:25:22,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:25:22,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-24 02:25:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-10-24 02:25:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 02:25:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-24 02:25:22,072 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2020-10-24 02:25:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:22,072 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-24 02:25:22,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:25:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-24 02:25:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-24 02:25:22,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:22,074 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:22,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:25:22,074 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:22,076 INFO L82 PathProgramCache]: Analyzing trace with hash 566706356, now seen corresponding path program 15 times [2020-10-24 02:25:22,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:22,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240571851] [2020-10-24 02:25:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:22,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:22,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240571851] [2020-10-24 02:25:22,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:22,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-24 02:25:22,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957916523] [2020-10-24 02:25:22,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-24 02:25:22,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:22,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-24 02:25:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:25:22,825 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2020-10-24 02:25:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:23,956 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-10-24 02:25:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-24 02:25:23,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-10-24 02:25:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:23,958 INFO L225 Difference]: With dead ends: 113 [2020-10-24 02:25:23,958 INFO L226 Difference]: Without dead ends: 106 [2020-10-24 02:25:23,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:25:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-24 02:25:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-24 02:25:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-24 02:25:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-24 02:25:23,968 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2020-10-24 02:25:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:23,968 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-24 02:25:23,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-24 02:25:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-24 02:25:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-24 02:25:23,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:23,969 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:23,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:25:23,970 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:23,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2121100228, now seen corresponding path program 16 times [2020-10-24 02:25:23,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:23,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291928449] [2020-10-24 02:25:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:24,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:24,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291928449] [2020-10-24 02:25:24,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:24,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:25:24,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247739401] [2020-10-24 02:25:24,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:25:24,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:24,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:25:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:25:24,759 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 36 states. [2020-10-24 02:25:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:25,958 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-24 02:25:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-24 02:25:25,958 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 102 [2020-10-24 02:25:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:25,960 INFO L225 Difference]: With dead ends: 118 [2020-10-24 02:25:25,960 INFO L226 Difference]: Without dead ends: 111 [2020-10-24 02:25:25,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:25:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-24 02:25:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-10-24 02:25:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-24 02:25:25,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-24 02:25:25,975 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2020-10-24 02:25:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:25,975 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-24 02:25:25,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:25:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-24 02:25:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-24 02:25:25,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:25,977 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:25,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:25:25,977 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:25,978 INFO L82 PathProgramCache]: Analyzing trace with hash -755616332, now seen corresponding path program 17 times [2020-10-24 02:25:25,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:25,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027899132] [2020-10-24 02:25:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:26,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:26,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027899132] [2020-10-24 02:25:26,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:26,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-24 02:25:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298299545] [2020-10-24 02:25:26,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 02:25:26,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 02:25:26,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:25:26,795 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 38 states. [2020-10-24 02:25:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:28,071 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-10-24 02:25:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-24 02:25:28,072 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2020-10-24 02:25:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:28,073 INFO L225 Difference]: With dead ends: 123 [2020-10-24 02:25:28,074 INFO L226 Difference]: Without dead ends: 116 [2020-10-24 02:25:28,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:25:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-24 02:25:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-10-24 02:25:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-24 02:25:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-24 02:25:28,083 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2020-10-24 02:25:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:28,083 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-24 02:25:28,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 02:25:28,084 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-24 02:25:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-24 02:25:28,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:28,085 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:28,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:25:28,085 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:28,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:28,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1886699324, now seen corresponding path program 18 times [2020-10-24 02:25:28,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:28,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097528770] [2020-10-24 02:25:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:28,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:29,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097528770] [2020-10-24 02:25:29,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:29,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:25:29,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245390307] [2020-10-24 02:25:29,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:25:29,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:25:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:25:29,006 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 40 states. [2020-10-24 02:25:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:30,484 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-24 02:25:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-24 02:25:30,485 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 112 [2020-10-24 02:25:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:30,486 INFO L225 Difference]: With dead ends: 128 [2020-10-24 02:25:30,486 INFO L226 Difference]: Without dead ends: 121 [2020-10-24 02:25:30,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 02:25:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-24 02:25:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-10-24 02:25:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-24 02:25:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-24 02:25:30,496 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2020-10-24 02:25:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:30,496 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-24 02:25:30,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:25:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-24 02:25:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-24 02:25:30,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:30,498 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:30,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:25:30,498 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1102506676, now seen corresponding path program 19 times [2020-10-24 02:25:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:30,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472163585] [2020-10-24 02:25:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:31,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:31,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472163585] [2020-10-24 02:25:31,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:31,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-24 02:25:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577458323] [2020-10-24 02:25:31,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-24 02:25:31,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-24 02:25:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:25:31,516 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 42 states. [2020-10-24 02:25:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:33,053 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2020-10-24 02:25:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-24 02:25:33,054 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 117 [2020-10-24 02:25:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:33,055 INFO L225 Difference]: With dead ends: 133 [2020-10-24 02:25:33,055 INFO L226 Difference]: Without dead ends: 126 [2020-10-24 02:25:33,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:25:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-24 02:25:33,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-24 02:25:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-24 02:25:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-24 02:25:33,065 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2020-10-24 02:25:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:33,065 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-24 02:25:33,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-24 02:25:33,065 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-24 02:25:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-24 02:25:33,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:33,067 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:33,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:25:33,067 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash 383593020, now seen corresponding path program 20 times [2020-10-24 02:25:33,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:33,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032153152] [2020-10-24 02:25:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:34,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032153152] [2020-10-24 02:25:34,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:34,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:25:34,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969972326] [2020-10-24 02:25:34,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:25:34,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:25:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:25:34,155 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 44 states. [2020-10-24 02:25:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:35,802 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-24 02:25:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-24 02:25:35,806 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 122 [2020-10-24 02:25:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:35,807 INFO L225 Difference]: With dead ends: 138 [2020-10-24 02:25:35,807 INFO L226 Difference]: Without dead ends: 131 [2020-10-24 02:25:35,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:25:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-24 02:25:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-10-24 02:25:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-24 02:25:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-10-24 02:25:35,817 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2020-10-24 02:25:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:35,817 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-10-24 02:25:35,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:25:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-10-24 02:25:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-24 02:25:35,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:35,819 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:35,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:25:35,819 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:35,820 INFO L82 PathProgramCache]: Analyzing trace with hash -220635212, now seen corresponding path program 21 times [2020-10-24 02:25:35,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:35,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601266172] [2020-10-24 02:25:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:36,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601266172] [2020-10-24 02:25:36,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:36,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:25:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311525142] [2020-10-24 02:25:36,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:25:36,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:25:36,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:25:36,987 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 46 states. [2020-10-24 02:25:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:38,884 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-10-24 02:25:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-24 02:25:38,884 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 127 [2020-10-24 02:25:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:38,886 INFO L225 Difference]: With dead ends: 143 [2020-10-24 02:25:38,886 INFO L226 Difference]: Without dead ends: 136 [2020-10-24 02:25:38,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 02:25:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-24 02:25:38,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-10-24 02:25:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-24 02:25:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-24 02:25:38,895 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2020-10-24 02:25:38,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:38,895 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-24 02:25:38,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:25:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-24 02:25:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-24 02:25:38,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:38,896 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:38,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:25:38,897 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1912329532, now seen corresponding path program 22 times [2020-10-24 02:25:38,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:38,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012403829] [2020-10-24 02:25:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:40,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:40,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012403829] [2020-10-24 02:25:40,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:40,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:25:40,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210679964] [2020-10-24 02:25:40,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:25:40,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:40,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:25:40,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:25:40,208 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 48 states. [2020-10-24 02:25:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:42,269 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-10-24 02:25:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-24 02:25:42,269 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 132 [2020-10-24 02:25:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:42,271 INFO L225 Difference]: With dead ends: 148 [2020-10-24 02:25:42,271 INFO L226 Difference]: Without dead ends: 141 [2020-10-24 02:25:42,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-10-24 02:25:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-24 02:25:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-10-24 02:25:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-24 02:25:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2020-10-24 02:25:42,280 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2020-10-24 02:25:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:42,280 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2020-10-24 02:25:42,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:25:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2020-10-24 02:25:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-24 02:25:42,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:42,282 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:42,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:25:42,282 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1490185036, now seen corresponding path program 23 times [2020-10-24 02:25:42,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:42,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43554325] [2020-10-24 02:25:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:43,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:43,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43554325] [2020-10-24 02:25:43,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:43,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-24 02:25:43,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120077412] [2020-10-24 02:25:43,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 02:25:43,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:43,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 02:25:43,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:25:43,638 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 50 states. [2020-10-24 02:25:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:45,896 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-10-24 02:25:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-24 02:25:45,901 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 137 [2020-10-24 02:25:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:45,903 INFO L225 Difference]: With dead ends: 153 [2020-10-24 02:25:45,903 INFO L226 Difference]: Without dead ends: 146 [2020-10-24 02:25:45,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-10-24 02:25:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-24 02:25:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-24 02:25:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-24 02:25:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-24 02:25:45,911 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2020-10-24 02:25:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:45,911 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-24 02:25:45,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 02:25:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-24 02:25:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-24 02:25:45,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:45,913 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:45,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:25:45,913 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1023360964, now seen corresponding path program 24 times [2020-10-24 02:25:45,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:45,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842492808] [2020-10-24 02:25:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:47,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:47,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842492808] [2020-10-24 02:25:47,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:47,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-24 02:25:47,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846645247] [2020-10-24 02:25:47,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 02:25:47,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 02:25:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:25:47,401 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 52 states. [2020-10-24 02:25:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:49,912 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-10-24 02:25:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-24 02:25:49,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 142 [2020-10-24 02:25:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:49,914 INFO L225 Difference]: With dead ends: 158 [2020-10-24 02:25:49,914 INFO L226 Difference]: Without dead ends: 151 [2020-10-24 02:25:49,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 02:25:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-24 02:25:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-10-24 02:25:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-24 02:25:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2020-10-24 02:25:49,930 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2020-10-24 02:25:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:49,930 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2020-10-24 02:25:49,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 02:25:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2020-10-24 02:25:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-24 02:25:49,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:49,932 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:49,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:25:49,933 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1535347124, now seen corresponding path program 25 times [2020-10-24 02:25:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:49,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280753215] [2020-10-24 02:25:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:51,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:51,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280753215] [2020-10-24 02:25:51,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:51,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-24 02:25:51,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442661622] [2020-10-24 02:25:51,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-24 02:25:51,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:51,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-24 02:25:51,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 02:25:51,573 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 54 states. [2020-10-24 02:25:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:54,215 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-10-24 02:25:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-24 02:25:54,216 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 147 [2020-10-24 02:25:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:54,218 INFO L225 Difference]: With dead ends: 163 [2020-10-24 02:25:54,218 INFO L226 Difference]: Without dead ends: 156 [2020-10-24 02:25:54,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-10-24 02:25:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-24 02:25:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-24 02:25:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-24 02:25:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-24 02:25:54,230 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2020-10-24 02:25:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:54,230 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-24 02:25:54,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-24 02:25:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-24 02:25:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-24 02:25:54,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:54,232 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:54,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:25:54,233 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1893995716, now seen corresponding path program 26 times [2020-10-24 02:25:54,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:54,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632872883] [2020-10-24 02:25:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:55,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:55,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632872883] [2020-10-24 02:25:55,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:55,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-24 02:25:55,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595907485] [2020-10-24 02:25:55,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 02:25:55,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:55,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 02:25:55,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:25:55,934 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 56 states. [2020-10-24 02:25:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:58,752 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-10-24 02:25:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-24 02:25:58,753 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 152 [2020-10-24 02:25:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:58,755 INFO L225 Difference]: With dead ends: 168 [2020-10-24 02:25:58,755 INFO L226 Difference]: Without dead ends: 161 [2020-10-24 02:25:58,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-10-24 02:25:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-24 02:25:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-10-24 02:25:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-24 02:25:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2020-10-24 02:25:58,764 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2020-10-24 02:25:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:58,764 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2020-10-24 02:25:58,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 02:25:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2020-10-24 02:25:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-24 02:25:58,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:58,765 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:58,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:25:58,766 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:58,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1219182260, now seen corresponding path program 27 times [2020-10-24 02:25:58,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:58,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082727650] [2020-10-24 02:25:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:00,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:00,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082727650] [2020-10-24 02:26:00,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:00,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-24 02:26:00,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398974725] [2020-10-24 02:26:00,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-24 02:26:00,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:00,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-24 02:26:00,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 02:26:00,591 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 58 states. [2020-10-24 02:26:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:03,599 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2020-10-24 02:26:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-24 02:26:03,601 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 157 [2020-10-24 02:26:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:03,603 INFO L225 Difference]: With dead ends: 173 [2020-10-24 02:26:03,603 INFO L226 Difference]: Without dead ends: 166 [2020-10-24 02:26:03,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-10-24 02:26:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-24 02:26:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-24 02:26:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-24 02:26:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-10-24 02:26:03,615 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2020-10-24 02:26:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:03,615 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-10-24 02:26:03,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-24 02:26:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-10-24 02:26:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-24 02:26:03,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:03,617 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:03,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:26:03,618 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1619175876, now seen corresponding path program 28 times [2020-10-24 02:26:03,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:03,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5416650] [2020-10-24 02:26:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:05,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:05,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5416650] [2020-10-24 02:26:05,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:05,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-24 02:26:05,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600686155] [2020-10-24 02:26:05,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 02:26:05,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:05,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 02:26:05,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:26:05,563 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 60 states. [2020-10-24 02:26:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:08,864 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-10-24 02:26:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-24 02:26:08,865 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 162 [2020-10-24 02:26:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:08,867 INFO L225 Difference]: With dead ends: 178 [2020-10-24 02:26:08,867 INFO L226 Difference]: Without dead ends: 171 [2020-10-24 02:26:08,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-10-24 02:26:08,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-24 02:26:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-10-24 02:26:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-24 02:26:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2020-10-24 02:26:08,876 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2020-10-24 02:26:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:08,877 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2020-10-24 02:26:08,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 02:26:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2020-10-24 02:26:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-24 02:26:08,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:08,878 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:08,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:26:08,878 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash -478891084, now seen corresponding path program 29 times [2020-10-24 02:26:08,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:08,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728574120] [2020-10-24 02:26:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:10,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:10,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728574120] [2020-10-24 02:26:10,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:10,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-24 02:26:10,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779079886] [2020-10-24 02:26:10,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-24 02:26:10,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:10,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-24 02:26:10,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-10-24 02:26:10,951 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 62 states. [2020-10-24 02:26:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:14,447 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-10-24 02:26:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-24 02:26:14,448 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 167 [2020-10-24 02:26:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:14,450 INFO L225 Difference]: With dead ends: 183 [2020-10-24 02:26:14,450 INFO L226 Difference]: Without dead ends: 176 [2020-10-24 02:26:14,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-10-24 02:26:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-24 02:26:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-10-24 02:26:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-24 02:26:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-10-24 02:26:14,459 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2020-10-24 02:26:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:14,459 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-10-24 02:26:14,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-24 02:26:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-10-24 02:26:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-24 02:26:14,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:14,461 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:14,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:26:14,461 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:14,461 INFO L82 PathProgramCache]: Analyzing trace with hash 22348092, now seen corresponding path program 30 times [2020-10-24 02:26:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:14,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206311120] [2020-10-24 02:26:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:16,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:16,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206311120] [2020-10-24 02:26:16,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:16,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-24 02:26:16,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868405610] [2020-10-24 02:26:16,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-24 02:26:16,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-24 02:26:16,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:26:16,740 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 64 states. [2020-10-24 02:26:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:20,450 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-10-24 02:26:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-24 02:26:20,450 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 172 [2020-10-24 02:26:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:20,453 INFO L225 Difference]: With dead ends: 188 [2020-10-24 02:26:20,453 INFO L226 Difference]: Without dead ends: 181 [2020-10-24 02:26:20,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-10-24 02:26:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-24 02:26:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-24 02:26:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-24 02:26:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2020-10-24 02:26:20,462 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 172 [2020-10-24 02:26:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:20,462 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2020-10-24 02:26:20,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-24 02:26:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2020-10-24 02:26:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-24 02:26:20,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:20,464 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:20,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:26:20,464 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash -592451404, now seen corresponding path program 31 times [2020-10-24 02:26:20,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:20,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115655664] [2020-10-24 02:26:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:22,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:22,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115655664] [2020-10-24 02:26:22,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:22,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-24 02:26:22,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404582355] [2020-10-24 02:26:22,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-24 02:26:22,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-24 02:26:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 02:26:22,916 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 66 states. [2020-10-24 02:26:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:26,702 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2020-10-24 02:26:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-24 02:26:26,703 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 177 [2020-10-24 02:26:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:26,705 INFO L225 Difference]: With dead ends: 193 [2020-10-24 02:26:26,705 INFO L226 Difference]: Without dead ends: 186 [2020-10-24 02:26:26,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-10-24 02:26:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-24 02:26:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-24 02:26:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-24 02:26:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-10-24 02:26:26,714 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 177 [2020-10-24 02:26:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:26,715 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-10-24 02:26:26,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-24 02:26:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-10-24 02:26:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-24 02:26:26,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:26,716 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:26,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:26:26,717 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash 97709116, now seen corresponding path program 32 times [2020-10-24 02:26:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:26,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496899746] [2020-10-24 02:26:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:29,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:29,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496899746] [2020-10-24 02:26:29,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:29,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-24 02:26:29,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043094983] [2020-10-24 02:26:29,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-24 02:26:29,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:29,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-24 02:26:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:26:29,349 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 68 states. [2020-10-24 02:26:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:33,741 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-10-24 02:26:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-24 02:26:33,742 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 182 [2020-10-24 02:26:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:33,744 INFO L225 Difference]: With dead ends: 198 [2020-10-24 02:26:33,744 INFO L226 Difference]: Without dead ends: 191 [2020-10-24 02:26:33,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-10-24 02:26:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-24 02:26:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2020-10-24 02:26:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-24 02:26:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2020-10-24 02:26:33,753 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 182 [2020-10-24 02:26:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:33,754 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2020-10-24 02:26:33,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-24 02:26:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2020-10-24 02:26:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-24 02:26:33,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:33,755 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:33,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:26:33,755 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:33,756 INFO L82 PathProgramCache]: Analyzing trace with hash 556588468, now seen corresponding path program 33 times [2020-10-24 02:26:33,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:33,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192289637] [2020-10-24 02:26:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:36,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:36,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192289637] [2020-10-24 02:26:36,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:36,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-24 02:26:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274833742] [2020-10-24 02:26:36,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-24 02:26:36,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-24 02:26:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:26:36,684 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 70 states. [2020-10-24 02:26:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:41,063 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2020-10-24 02:26:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-24 02:26:41,064 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 187 [2020-10-24 02:26:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:41,066 INFO L225 Difference]: With dead ends: 203 [2020-10-24 02:26:41,066 INFO L226 Difference]: Without dead ends: 196 [2020-10-24 02:26:41,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-10-24 02:26:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-24 02:26:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2020-10-24 02:26:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-24 02:26:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-10-24 02:26:41,075 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 187 [2020-10-24 02:26:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:41,076 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-10-24 02:26:41,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-24 02:26:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-10-24 02:26:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-24 02:26:41,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:41,077 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:41,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:26:41,078 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1109858108, now seen corresponding path program 34 times [2020-10-24 02:26:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:41,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555513133] [2020-10-24 02:26:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:44,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:44,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555513133] [2020-10-24 02:26:44,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:44,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-24 02:26:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374293601] [2020-10-24 02:26:44,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-24 02:26:44,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-24 02:26:44,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:26:44,065 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 72 states. [2020-10-24 02:26:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:48,700 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2020-10-24 02:26:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-24 02:26:48,701 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 192 [2020-10-24 02:26:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:48,703 INFO L225 Difference]: With dead ends: 208 [2020-10-24 02:26:48,703 INFO L226 Difference]: Without dead ends: 201 [2020-10-24 02:26:48,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-10-24 02:26:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-24 02:26:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-10-24 02:26:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-24 02:26:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-10-24 02:26:48,712 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 192 [2020-10-24 02:26:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:48,712 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-10-24 02:26:48,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-24 02:26:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-10-24 02:26:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-24 02:26:48,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:48,714 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:48,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:26:48,714 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash -642018636, now seen corresponding path program 35 times [2020-10-24 02:26:48,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:48,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704164050] [2020-10-24 02:26:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:51,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:51,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704164050] [2020-10-24 02:26:51,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:51,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-24 02:26:51,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657325253] [2020-10-24 02:26:51,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-24 02:26:51,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:51,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-24 02:26:51,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 02:26:51,916 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 74 states. [2020-10-24 02:26:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:56,839 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2020-10-24 02:26:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-10-24 02:26:56,840 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 197 [2020-10-24 02:26:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:56,842 INFO L225 Difference]: With dead ends: 213 [2020-10-24 02:26:56,843 INFO L226 Difference]: Without dead ends: 206 [2020-10-24 02:26:56,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-10-24 02:26:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-24 02:26:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-24 02:26:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-24 02:26:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-10-24 02:26:56,853 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 197 [2020-10-24 02:26:56,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:56,854 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-10-24 02:26:56,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-24 02:26:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-10-24 02:26:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-24 02:26:56,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:56,856 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:56,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:26:56,856 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1887337924, now seen corresponding path program 36 times [2020-10-24 02:26:56,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:56,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612002457] [2020-10-24 02:26:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:00,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:00,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612002457] [2020-10-24 02:27:00,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:00,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-24 02:27:00,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473770609] [2020-10-24 02:27:00,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-24 02:27:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-24 02:27:00,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 02:27:00,330 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 76 states. [2020-10-24 02:27:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:05,753 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2020-10-24 02:27:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-24 02:27:05,754 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 202 [2020-10-24 02:27:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:05,756 INFO L225 Difference]: With dead ends: 218 [2020-10-24 02:27:05,756 INFO L226 Difference]: Without dead ends: 211 [2020-10-24 02:27:05,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-10-24 02:27:05,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-24 02:27:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-24 02:27:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-24 02:27:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2020-10-24 02:27:05,766 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 202 [2020-10-24 02:27:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:05,767 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2020-10-24 02:27:05,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-24 02:27:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2020-10-24 02:27:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-24 02:27:05,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:05,768 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:05,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:27:05,768 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1798047668, now seen corresponding path program 37 times [2020-10-24 02:27:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:05,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789470677] [2020-10-24 02:27:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:09,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:09,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789470677] [2020-10-24 02:27:09,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:09,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-24 02:27:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43280918] [2020-10-24 02:27:09,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-24 02:27:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:09,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-24 02:27:09,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-10-24 02:27:09,400 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 78 states. [2020-10-24 02:27:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:15,258 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2020-10-24 02:27:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-24 02:27:15,260 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 207 [2020-10-24 02:27:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:15,261 INFO L225 Difference]: With dead ends: 223 [2020-10-24 02:27:15,261 INFO L226 Difference]: Without dead ends: 216 [2020-10-24 02:27:15,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-10-24 02:27:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-24 02:27:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-10-24 02:27:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-24 02:27:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2020-10-24 02:27:15,269 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 207 [2020-10-24 02:27:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:15,269 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2020-10-24 02:27:15,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-24 02:27:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2020-10-24 02:27:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-24 02:27:15,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:15,271 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:15,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:27:15,271 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 185740604, now seen corresponding path program 38 times [2020-10-24 02:27:15,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:15,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828089792] [2020-10-24 02:27:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:19,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:19,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828089792] [2020-10-24 02:27:19,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:19,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-24 02:27:19,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649528055] [2020-10-24 02:27:19,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-24 02:27:19,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:19,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-24 02:27:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:27:19,214 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 80 states. [2020-10-24 02:27:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:25,466 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2020-10-24 02:27:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-24 02:27:25,467 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 212 [2020-10-24 02:27:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:25,469 INFO L225 Difference]: With dead ends: 228 [2020-10-24 02:27:25,470 INFO L226 Difference]: Without dead ends: 221 [2020-10-24 02:27:25,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-10-24 02:27:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-24 02:27:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2020-10-24 02:27:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-24 02:27:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2020-10-24 02:27:25,480 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 212 [2020-10-24 02:27:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:25,480 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2020-10-24 02:27:25,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-24 02:27:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2020-10-24 02:27:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-24 02:27:25,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:25,482 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:25,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:27:25,482 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:25,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1984838836, now seen corresponding path program 39 times [2020-10-24 02:27:25,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:25,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344839490] [2020-10-24 02:27:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:29,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:29,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344839490] [2020-10-24 02:27:29,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:29,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-24 02:27:29,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096976112] [2020-10-24 02:27:29,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-24 02:27:29,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:29,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-24 02:27:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 02:27:29,639 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 82 states. [2020-10-24 02:27:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:36,279 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2020-10-24 02:27:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-24 02:27:36,280 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 217 [2020-10-24 02:27:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:36,281 INFO L225 Difference]: With dead ends: 233 [2020-10-24 02:27:36,282 INFO L226 Difference]: Without dead ends: 226 [2020-10-24 02:27:36,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-10-24 02:27:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-24 02:27:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-10-24 02:27:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-24 02:27:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2020-10-24 02:27:36,289 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 217 [2020-10-24 02:27:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:36,290 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2020-10-24 02:27:36,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-24 02:27:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2020-10-24 02:27:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-24 02:27:36,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:36,291 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:36,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:27:36,291 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash 369694780, now seen corresponding path program 40 times [2020-10-24 02:27:36,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:36,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910743984] [2020-10-24 02:27:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:40,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:40,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910743984] [2020-10-24 02:27:40,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:40,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-24 02:27:40,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023086293] [2020-10-24 02:27:40,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-24 02:27:40,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-24 02:27:40,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:27:40,798 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 84 states. [2020-10-24 02:27:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:47,870 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2020-10-24 02:27:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-10-24 02:27:47,872 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 222 [2020-10-24 02:27:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:47,874 INFO L225 Difference]: With dead ends: 238 [2020-10-24 02:27:47,874 INFO L226 Difference]: Without dead ends: 231 [2020-10-24 02:27:47,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-10-24 02:27:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-24 02:27:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2020-10-24 02:27:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-24 02:27:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2020-10-24 02:27:47,883 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 222 [2020-10-24 02:27:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:47,883 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2020-10-24 02:27:47,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-24 02:27:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2020-10-24 02:27:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-24 02:27:47,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:47,885 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:47,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:27:47,885 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:47,886 INFO L82 PathProgramCache]: Analyzing trace with hash -671993420, now seen corresponding path program 41 times [2020-10-24 02:27:47,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:47,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303679728] [2020-10-24 02:27:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:52,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:52,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303679728] [2020-10-24 02:27:52,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:52,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-24 02:27:52,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73650382] [2020-10-24 02:27:52,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-24 02:27:52,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:52,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-24 02:27:52,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 02:27:52,770 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 86 states. [2020-10-24 02:28:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:00,580 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2020-10-24 02:28:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-24 02:28:00,581 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 227 [2020-10-24 02:28:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:00,583 INFO L225 Difference]: With dead ends: 243 [2020-10-24 02:28:00,584 INFO L226 Difference]: Without dead ends: 236 [2020-10-24 02:28:00,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-10-24 02:28:00,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-24 02:28:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-10-24 02:28:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-24 02:28:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2020-10-24 02:28:00,598 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 227 [2020-10-24 02:28:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:00,601 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2020-10-24 02:28:00,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-24 02:28:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2020-10-24 02:28:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-24 02:28:00,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:00,603 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:00,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:28:00,603 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:00,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1435910972, now seen corresponding path program 42 times [2020-10-24 02:28:00,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:00,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888944224] [2020-10-24 02:28:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:05,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:05,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888944224] [2020-10-24 02:28:05,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:05,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-24 02:28:05,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165301665] [2020-10-24 02:28:05,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-24 02:28:05,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:05,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-24 02:28:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 02:28:05,822 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 88 states. [2020-10-24 02:28:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:13,811 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2020-10-24 02:28:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-10-24 02:28:13,812 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 232 [2020-10-24 02:28:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:13,814 INFO L225 Difference]: With dead ends: 248 [2020-10-24 02:28:13,814 INFO L226 Difference]: Without dead ends: 241 [2020-10-24 02:28:13,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-10-24 02:28:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-24 02:28:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-10-24 02:28:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-24 02:28:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2020-10-24 02:28:13,825 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 232 [2020-10-24 02:28:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:13,825 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2020-10-24 02:28:13,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-24 02:28:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2020-10-24 02:28:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-24 02:28:13,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:13,827 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:13,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:28:13,827 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:13,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1461197132, now seen corresponding path program 43 times [2020-10-24 02:28:13,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:13,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256283058] [2020-10-24 02:28:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:19,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:19,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256283058] [2020-10-24 02:28:19,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:19,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-24 02:28:19,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958110637] [2020-10-24 02:28:19,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-24 02:28:19,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:19,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-24 02:28:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 02:28:19,443 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 90 states. [2020-10-24 02:28:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:28,385 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2020-10-24 02:28:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-10-24 02:28:28,386 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 237 [2020-10-24 02:28:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:28,389 INFO L225 Difference]: With dead ends: 253 [2020-10-24 02:28:28,389 INFO L226 Difference]: Without dead ends: 246 [2020-10-24 02:28:28,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-10-24 02:28:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-24 02:28:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-24 02:28:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-24 02:28:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2020-10-24 02:28:28,400 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 237 [2020-10-24 02:28:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:28,400 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2020-10-24 02:28:28,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-24 02:28:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2020-10-24 02:28:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-24 02:28:28,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:28,402 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:28,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 02:28:28,402 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1293308356, now seen corresponding path program 44 times [2020-10-24 02:28:28,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:28,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524940122] [2020-10-24 02:28:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:34,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524940122] [2020-10-24 02:28:34,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:34,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-24 02:28:34,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716853614] [2020-10-24 02:28:34,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-24 02:28:34,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-24 02:28:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-10-24 02:28:34,557 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 92 states. [2020-10-24 02:28:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:44,200 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2020-10-24 02:28:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-10-24 02:28:44,201 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 242 [2020-10-24 02:28:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:44,204 INFO L225 Difference]: With dead ends: 258 [2020-10-24 02:28:44,204 INFO L226 Difference]: Without dead ends: 251 [2020-10-24 02:28:44,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-10-24 02:28:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-24 02:28:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2020-10-24 02:28:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-24 02:28:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2020-10-24 02:28:44,226 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 242 [2020-10-24 02:28:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:44,227 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2020-10-24 02:28:44,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-24 02:28:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2020-10-24 02:28:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-24 02:28:44,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:44,229 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:44,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 02:28:44,229 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1040145332, now seen corresponding path program 45 times [2020-10-24 02:28:44,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:44,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465645935] [2020-10-24 02:28:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:50,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:50,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465645935] [2020-10-24 02:28:50,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:50,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-10-24 02:28:50,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23485556] [2020-10-24 02:28:50,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-24 02:28:50,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:50,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-24 02:28:50,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-10-24 02:28:50,834 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 94 states. [2020-10-24 02:29:01,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:01,666 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2020-10-24 02:29:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-10-24 02:29:01,668 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 247 [2020-10-24 02:29:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:01,670 INFO L225 Difference]: With dead ends: 263 [2020-10-24 02:29:01,670 INFO L226 Difference]: Without dead ends: 256 [2020-10-24 02:29:01,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-10-24 02:29:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-24 02:29:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-10-24 02:29:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-24 02:29:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2020-10-24 02:29:01,681 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 247 [2020-10-24 02:29:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:01,681 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2020-10-24 02:29:01,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-24 02:29:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2020-10-24 02:29:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-24 02:29:01,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:01,683 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:01,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 02:29:01,684 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:01,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1530091836, now seen corresponding path program 46 times [2020-10-24 02:29:01,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:01,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630483451] [2020-10-24 02:29:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:09,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:09,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630483451] [2020-10-24 02:29:09,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:09,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-10-24 02:29:09,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356520435] [2020-10-24 02:29:09,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-24 02:29:09,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:09,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-24 02:29:09,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-10-24 02:29:09,371 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 96 states. [2020-10-24 02:29:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:20,942 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2020-10-24 02:29:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-10-24 02:29:20,944 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 252 [2020-10-24 02:29:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:20,946 INFO L225 Difference]: With dead ends: 268 [2020-10-24 02:29:20,947 INFO L226 Difference]: Without dead ends: 261 [2020-10-24 02:29:20,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-10-24 02:29:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-24 02:29:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2020-10-24 02:29:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-24 02:29:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2020-10-24 02:29:20,968 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 252 [2020-10-24 02:29:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:20,968 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2020-10-24 02:29:20,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-10-24 02:29:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2020-10-24 02:29:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-24 02:29:20,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:20,970 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:20,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-24 02:29:20,970 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:20,971 INFO L82 PathProgramCache]: Analyzing trace with hash 671649972, now seen corresponding path program 47 times [2020-10-24 02:29:20,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:20,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601478043] [2020-10-24 02:29:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:29,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:29,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601478043] [2020-10-24 02:29:29,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:29,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-10-24 02:29:29,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780356642] [2020-10-24 02:29:29,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-10-24 02:29:29,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-10-24 02:29:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-10-24 02:29:29,295 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 98 states. [2020-10-24 02:29:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:42,730 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2020-10-24 02:29:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-10-24 02:29:42,732 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 257 [2020-10-24 02:29:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:42,735 INFO L225 Difference]: With dead ends: 273 [2020-10-24 02:29:42,735 INFO L226 Difference]: Without dead ends: 266 [2020-10-24 02:29:42,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-10-24 02:29:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-24 02:29:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-10-24 02:29:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-24 02:29:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2020-10-24 02:29:42,745 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 257 [2020-10-24 02:29:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:42,745 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2020-10-24 02:29:42,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-10-24 02:29:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2020-10-24 02:29:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-24 02:29:42,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:42,748 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:42,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-24 02:29:42,748 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:42,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1079819204, now seen corresponding path program 48 times [2020-10-24 02:29:42,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:42,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442884420] [2020-10-24 02:29:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:52,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:52,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442884420] [2020-10-24 02:29:52,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:52,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-10-24 02:29:52,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907992212] [2020-10-24 02:29:52,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-10-24 02:29:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-10-24 02:29:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 02:29:52,267 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 100 states. [2020-10-24 02:30:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:06,571 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2020-10-24 02:30:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-10-24 02:30:06,573 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 262 [2020-10-24 02:30:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:06,575 INFO L225 Difference]: With dead ends: 278 [2020-10-24 02:30:06,576 INFO L226 Difference]: Without dead ends: 271 [2020-10-24 02:30:06,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-10-24 02:30:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-24 02:30:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2020-10-24 02:30:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-24 02:30:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2020-10-24 02:30:06,586 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 262 [2020-10-24 02:30:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:06,586 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2020-10-24 02:30:06,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-10-24 02:30:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2020-10-24 02:30:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-24 02:30:06,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:06,589 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:06,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-24 02:30:06,589 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 869500340, now seen corresponding path program 49 times [2020-10-24 02:30:06,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:06,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401626778] [2020-10-24 02:30:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:16,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:16,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401626778] [2020-10-24 02:30:16,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:16,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-10-24 02:30:16,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701217742] [2020-10-24 02:30:16,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-10-24 02:30:16,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-10-24 02:30:16,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-10-24 02:30:16,723 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 102 states. [2020-10-24 02:30:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:33,057 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2020-10-24 02:30:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-10-24 02:30:33,060 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 267 [2020-10-24 02:30:33,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:33,063 INFO L225 Difference]: With dead ends: 283 [2020-10-24 02:30:33,063 INFO L226 Difference]: Without dead ends: 276 [2020-10-24 02:30:33,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-10-24 02:30:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-24 02:30:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2020-10-24 02:30:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-24 02:30:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2020-10-24 02:30:33,076 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 267 [2020-10-24 02:30:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:33,077 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2020-10-24 02:30:33,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-10-24 02:30:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2020-10-24 02:30:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-24 02:30:33,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:33,080 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:33,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-24 02:30:33,080 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1788252356, now seen corresponding path program 50 times [2020-10-24 02:30:33,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:33,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643236619] [2020-10-24 02:30:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:44,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643236619] [2020-10-24 02:30:44,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:44,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-10-24 02:30:44,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908093677] [2020-10-24 02:30:44,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-10-24 02:30:44,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:44,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-10-24 02:30:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-10-24 02:30:44,634 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 104 states. [2020-10-24 02:31:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:02,429 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2020-10-24 02:31:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-10-24 02:31:02,432 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 272 [2020-10-24 02:31:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:02,434 INFO L225 Difference]: With dead ends: 288 [2020-10-24 02:31:02,435 INFO L226 Difference]: Without dead ends: 281 [2020-10-24 02:31:02,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-10-24 02:31:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-24 02:31:02,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2020-10-24 02:31:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-24 02:31:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2020-10-24 02:31:02,450 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 272 [2020-10-24 02:31:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:02,451 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2020-10-24 02:31:02,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-10-24 02:31:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2020-10-24 02:31:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-24 02:31:02,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:02,454 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:02,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-24 02:31:02,454 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:02,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1781545652, now seen corresponding path program 51 times [2020-10-24 02:31:02,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:02,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111684148] [2020-10-24 02:31:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:14,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:14,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111684148] [2020-10-24 02:31:14,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:14,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-10-24 02:31:14,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872924293] [2020-10-24 02:31:14,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-10-24 02:31:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-10-24 02:31:14,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-10-24 02:31:14,993 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 106 states. [2020-10-24 02:31:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:34,882 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2020-10-24 02:31:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-10-24 02:31:34,885 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 277 [2020-10-24 02:31:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:34,886 INFO L225 Difference]: With dead ends: 293 [2020-10-24 02:31:34,886 INFO L226 Difference]: Without dead ends: 286 [2020-10-24 02:31:34,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-10-24 02:31:34,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-24 02:31:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 283. [2020-10-24 02:31:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-24 02:31:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2020-10-24 02:31:34,899 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 277 [2020-10-24 02:31:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:34,900 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2020-10-24 02:31:34,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-10-24 02:31:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2020-10-24 02:31:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-24 02:31:34,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:34,902 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:34,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-24 02:31:34,902 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:34,902 INFO L82 PathProgramCache]: Analyzing trace with hash -709502404, now seen corresponding path program 52 times [2020-10-24 02:31:34,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:34,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578470660] [2020-10-24 02:31:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:48,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:48,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578470660] [2020-10-24 02:31:48,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:48,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-10-24 02:31:48,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112934284] [2020-10-24 02:31:48,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-10-24 02:31:48,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-10-24 02:31:48,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-10-24 02:31:48,481 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 108 states. [2020-10-24 02:32:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:09,949 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2020-10-24 02:32:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-10-24 02:32:09,953 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 282 [2020-10-24 02:32:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:09,955 INFO L225 Difference]: With dead ends: 298 [2020-10-24 02:32:09,955 INFO L226 Difference]: Without dead ends: 291 [2020-10-24 02:32:09,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-10-24 02:32:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-24 02:32:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2020-10-24 02:32:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-24 02:32:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2020-10-24 02:32:09,966 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 282 [2020-10-24 02:32:09,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:09,967 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2020-10-24 02:32:09,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-10-24 02:32:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2020-10-24 02:32:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-24 02:32:09,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:09,970 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:09,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-24 02:32:09,970 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:09,971 INFO L82 PathProgramCache]: Analyzing trace with hash 267300788, now seen corresponding path program 53 times [2020-10-24 02:32:09,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:09,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619292839] [2020-10-24 02:32:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:25,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:25,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619292839] [2020-10-24 02:32:25,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:25,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2020-10-24 02:32:25,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075509411] [2020-10-24 02:32:25,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-10-24 02:32:25,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:25,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-10-24 02:32:25,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-10-24 02:32:25,281 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand 110 states. [2020-10-24 02:32:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:49,670 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2020-10-24 02:32:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-10-24 02:32:49,672 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 287 [2020-10-24 02:32:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:49,674 INFO L225 Difference]: With dead ends: 303 [2020-10-24 02:32:49,674 INFO L226 Difference]: Without dead ends: 296 [2020-10-24 02:32:49,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-10-24 02:32:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-24 02:32:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 293. [2020-10-24 02:32:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-24 02:32:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2020-10-24 02:32:49,686 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 287 [2020-10-24 02:32:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:49,686 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2020-10-24 02:32:49,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-10-24 02:32:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2020-10-24 02:32:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-24 02:32:49,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:49,689 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:49,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-24 02:32:49,689 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1111980740, now seen corresponding path program 54 times [2020-10-24 02:32:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:49,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40144026] [2020-10-24 02:32:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:06,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:06,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40144026] [2020-10-24 02:33:06,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:06,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2020-10-24 02:33:06,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769476990] [2020-10-24 02:33:06,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-10-24 02:33:06,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-10-24 02:33:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-10-24 02:33:06,435 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 112 states. [2020-10-24 02:33:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:33,887 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2020-10-24 02:33:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-10-24 02:33:33,891 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 292 [2020-10-24 02:33:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:33,893 INFO L225 Difference]: With dead ends: 308 [2020-10-24 02:33:33,894 INFO L226 Difference]: Without dead ends: 301 [2020-10-24 02:33:33,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-10-24 02:33:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-24 02:33:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-10-24 02:33:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-24 02:33:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2020-10-24 02:33:33,909 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 292 [2020-10-24 02:33:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:33,909 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2020-10-24 02:33:33,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-10-24 02:33:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2020-10-24 02:33:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-24 02:33:33,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:33,912 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:33,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-24 02:33:33,913 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1512119116, now seen corresponding path program 55 times [2020-10-24 02:33:33,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:33,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250682192] [2020-10-24 02:33:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:53,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:53,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250682192] [2020-10-24 02:33:53,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:53,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2020-10-24 02:33:53,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708700829] [2020-10-24 02:33:53,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-10-24 02:33:53,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-10-24 02:33:53,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-10-24 02:33:53,246 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 114 states. [2020-10-24 02:34:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:23,707 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2020-10-24 02:34:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-10-24 02:34:23,712 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 297 [2020-10-24 02:34:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:23,714 INFO L225 Difference]: With dead ends: 313 [2020-10-24 02:34:23,715 INFO L226 Difference]: Without dead ends: 306 [2020-10-24 02:34:23,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-10-24 02:34:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-24 02:34:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 303. [2020-10-24 02:34:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-24 02:34:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2020-10-24 02:34:23,729 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 297 [2020-10-24 02:34:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:23,729 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2020-10-24 02:34:23,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-10-24 02:34:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2020-10-24 02:34:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-24 02:34:23,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:23,733 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:23,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-24 02:34:23,733 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:23,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:23,734 INFO L82 PathProgramCache]: Analyzing trace with hash -828280772, now seen corresponding path program 56 times [2020-10-24 02:34:23,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:23,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972251925] [2020-10-24 02:34:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:44,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:45,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972251925] [2020-10-24 02:34:45,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2020-10-24 02:34:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55047274] [2020-10-24 02:34:45,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-10-24 02:34:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:45,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-10-24 02:34:45,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-10-24 02:34:45,076 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 116 states. [2020-10-24 02:35:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:19,617 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2020-10-24 02:35:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-10-24 02:35:19,622 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 302 [2020-10-24 02:35:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:19,625 INFO L225 Difference]: With dead ends: 318 [2020-10-24 02:35:19,625 INFO L226 Difference]: Without dead ends: 311 [2020-10-24 02:35:19,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-10-24 02:35:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-24 02:35:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2020-10-24 02:35:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-24 02:35:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2020-10-24 02:35:19,639 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 302 [2020-10-24 02:35:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:19,639 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2020-10-24 02:35:19,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-10-24 02:35:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2020-10-24 02:35:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-24 02:35:19,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:19,643 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:35:19,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-24 02:35:19,643 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash -388965964, now seen corresponding path program 57 times [2020-10-24 02:35:19,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:19,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448284550] [2020-10-24 02:35:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:43,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:35:43,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448284550] [2020-10-24 02:35:43,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:43,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2020-10-24 02:35:43,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157408260] [2020-10-24 02:35:43,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-10-24 02:35:43,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:43,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-10-24 02:35:43,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-10-24 02:35:43,807 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 118 states. [2020-10-24 02:36:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:21,550 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2020-10-24 02:36:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-10-24 02:36:21,555 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 307 [2020-10-24 02:36:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:21,558 INFO L225 Difference]: With dead ends: 323 [2020-10-24 02:36:21,558 INFO L226 Difference]: Without dead ends: 316 [2020-10-24 02:36:21,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 57.9s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-10-24 02:36:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-24 02:36:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2020-10-24 02:36:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-24 02:36:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2020-10-24 02:36:21,575 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 307 [2020-10-24 02:36:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:21,576 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2020-10-24 02:36:21,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-10-24 02:36:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2020-10-24 02:36:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-24 02:36:21,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:21,579 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:36:21,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-24 02:36:21,580 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:21,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash -845112516, now seen corresponding path program 58 times [2020-10-24 02:36:21,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:21,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273250676] [2020-10-24 02:36:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:47,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:36:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:36:47,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273250676] [2020-10-24 02:36:47,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:36:47,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2020-10-24 02:36:47,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279443630] [2020-10-24 02:36:47,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-10-24 02:36:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:36:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-10-24 02:36:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-10-24 02:36:47,511 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 120 states. [2020-10-24 02:37:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:37:29,930 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2020-10-24 02:37:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-10-24 02:37:29,935 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 312 [2020-10-24 02:37:29,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:37:29,938 INFO L225 Difference]: With dead ends: 328 [2020-10-24 02:37:29,938 INFO L226 Difference]: Without dead ends: 321 [2020-10-24 02:37:29,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-10-24 02:37:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-24 02:37:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-10-24 02:37:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-24 02:37:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 318 transitions. [2020-10-24 02:37:29,955 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 318 transitions. Word has length 312 [2020-10-24 02:37:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:37:29,955 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 318 transitions. [2020-10-24 02:37:29,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-10-24 02:37:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 318 transitions. [2020-10-24 02:37:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-24 02:37:29,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:37:29,958 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:37:29,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-24 02:37:29,958 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:37:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:37:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash -778793292, now seen corresponding path program 59 times [2020-10-24 02:37:29,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:37:29,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22058841] [2020-10-24 02:37:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:37:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:51,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:37:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:37:52,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22058841] [2020-10-24 02:37:52,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:37:52,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2020-10-24 02:37:52,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950317557] [2020-10-24 02:37:52,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-10-24 02:37:52,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:37:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-10-24 02:37:52,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-10-24 02:37:52,035 INFO L87 Difference]: Start difference. First operand 318 states and 318 transitions. Second operand 122 states. [2020-10-24 02:38:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:18,563 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2020-10-24 02:38:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-10-24 02:38:18,566 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 317 [2020-10-24 02:38:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:18,568 INFO L225 Difference]: With dead ends: 333 [2020-10-24 02:38:18,568 INFO L226 Difference]: Without dead ends: 326 [2020-10-24 02:38:18,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-10-24 02:38:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-24 02:38:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 323. [2020-10-24 02:38:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-24 02:38:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2020-10-24 02:38:18,579 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 317 [2020-10-24 02:38:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:18,579 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2020-10-24 02:38:18,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-10-24 02:38:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2020-10-24 02:38:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-24 02:38:18,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:18,582 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:18,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-24 02:38:18,582 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1008335300, now seen corresponding path program 60 times [2020-10-24 02:38:18,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:18,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888403941] [2020-10-24 02:38:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat