/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:32:58,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:32:58,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:32:58,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:32:58,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:32:58,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:32:58,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:32:58,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:32:58,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:32:58,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:32:58,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:32:58,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:32:58,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:32:58,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:32:58,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:32:58,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:32:58,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:32:58,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:32:58,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:32:58,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:32:58,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:32:58,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:32:58,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:32:58,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:32:58,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:32:58,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:32:58,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:32:58,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:32:58,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:32:58,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:32:58,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:32:58,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:32:58,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:32:58,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:32:58,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:32:58,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:32:58,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:32:58,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:32:58,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:32:58,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:32:58,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:32:58,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:32:58,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:32:58,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:32:58,552 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:32:58,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:32:58,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:32:58,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:32:58,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:32:58,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:32:58,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:32:58,553 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:32:58,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:32:58,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:32:58,878 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:32:58,880 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:32:58,880 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:32:58,881 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 18:32:58,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9b354e1/5ce0b0f6bfd341298746624394d20129/FLAGde901fa1d [2020-08-22 18:32:59,396 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:32:59,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 18:32:59,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9b354e1/5ce0b0f6bfd341298746624394d20129/FLAGde901fa1d [2020-08-22 18:32:59,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9b354e1/5ce0b0f6bfd341298746624394d20129 [2020-08-22 18:32:59,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:32:59,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:32:59,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:32:59,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:32:59,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:32:59,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:32:59" (1/1) ... [2020-08-22 18:32:59,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9af430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:59, skipping insertion in model container [2020-08-22 18:32:59,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:32:59" (1/1) ... [2020-08-22 18:32:59,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:32:59,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:33:00,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:00,121 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:33:00,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:00,219 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:33:00,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00 WrapperNode [2020-08-22 18:33:00,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:00,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:33:00,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:33:00,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:33:00,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:33:00,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:33:00,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:33:00,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:33:00,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (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 [2020-08-22 18:33:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:33:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:33:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 18:33:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 18:33:00,438 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 18:33:00,438 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 18:33:00,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:33:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:33:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 18:33:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 18:33:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 18:33:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 18:33:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 18:33:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 18:33:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:33:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:33:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:33:00,943 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:33:00,943 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 18:33:00,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:00 BoogieIcfgContainer [2020-08-22 18:33:00,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:33:00,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:33:00,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:33:00,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:33:00,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:32:59" (1/3) ... [2020-08-22 18:33:00,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f46a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:00, skipping insertion in model container [2020-08-22 18:33:00,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (2/3) ... [2020-08-22 18:33:00,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f46a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:00, skipping insertion in model container [2020-08-22 18:33:00,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:00" (3/3) ... [2020-08-22 18:33:00,958 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-22 18:33:00,969 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:33:00,977 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:33:00,991 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:33:01,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:33:01,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:33:01,017 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:33:01,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:33:01,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:33:01,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:33:01,018 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:33:01,018 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:33:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-08-22 18:33:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 18:33:01,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:01,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:01,058 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-08-22 18:33:01,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:01,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095248379] [2020-08-22 18:33:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:01,146 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 18:33:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 18:33:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 18:33:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 18:33:01,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095248379] [2020-08-22 18:33:01,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:01,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:33:01,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203322446] [2020-08-22 18:33:01,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:33:01,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:33:01,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:33:01,502 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-08-22 18:33:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:01,707 INFO L93 Difference]: Finished difference Result 286 states and 363 transitions. [2020-08-22 18:33:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:33:01,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-08-22 18:33:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:01,724 INFO L225 Difference]: With dead ends: 286 [2020-08-22 18:33:01,725 INFO L226 Difference]: Without dead ends: 168 [2020-08-22 18:33:01,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-22 18:33:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2020-08-22 18:33:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-08-22 18:33:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2020-08-22 18:33:01,813 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 100 [2020-08-22 18:33:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:01,814 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2020-08-22 18:33:01,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:33:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2020-08-22 18:33:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 18:33:01,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:01,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:01,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:33:01,822 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:01,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1947593625, now seen corresponding path program 1 times [2020-08-22 18:33:01,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:01,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195279217] [2020-08-22 18:33:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:01,825 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 18:33:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 18:33:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 18:33:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:01,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195279217] [2020-08-22 18:33:01,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:01,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:33:01,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423742084] [2020-08-22 18:33:01,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:33:01,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:01,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:33:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:33:01,954 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand 4 states. [2020-08-22 18:33:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:02,137 INFO L93 Difference]: Finished difference Result 278 states and 331 transitions. [2020-08-22 18:33:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 18:33:02,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-08-22 18:33:02,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:02,141 INFO L225 Difference]: With dead ends: 278 [2020-08-22 18:33:02,141 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 18:33:02,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 18:33:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-08-22 18:33:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 18:33:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-08-22 18:33:02,168 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 103 [2020-08-22 18:33:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:02,169 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-08-22 18:33:02,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:33:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-08-22 18:33:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 18:33:02,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:02,175 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:02,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:33:02,175 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:02,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1622356113, now seen corresponding path program 1 times [2020-08-22 18:33:02,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:02,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33957540] [2020-08-22 18:33:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:02,179 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 18:33:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 18:33:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 18:33:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:02,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33957540] [2020-08-22 18:33:02,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:02,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:02,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396473257] [2020-08-22 18:33:02,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:02,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:02,302 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 5 states. [2020-08-22 18:33:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:02,418 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-08-22 18:33:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:02,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 18:33:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:02,422 INFO L225 Difference]: With dead ends: 314 [2020-08-22 18:33:02,422 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 18:33:02,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 18:33:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2020-08-22 18:33:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 18:33:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-08-22 18:33:02,463 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 108 [2020-08-22 18:33:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:02,464 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-08-22 18:33:02,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-08-22 18:33:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 18:33:02,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:02,477 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:02,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:33:02,477 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1409900093, now seen corresponding path program 1 times [2020-08-22 18:33:02,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:02,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260428541] [2020-08-22 18:33:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:02,484 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 18:33:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 18:33:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 18:33:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:02,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260428541] [2020-08-22 18:33:02,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:02,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:02,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037169541] [2020-08-22 18:33:02,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:02,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:02,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:02,682 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 5 states. [2020-08-22 18:33:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:02,775 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-08-22 18:33:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:02,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 18:33:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:02,778 INFO L225 Difference]: With dead ends: 314 [2020-08-22 18:33:02,779 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 18:33:02,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 18:33:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2020-08-22 18:33:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-22 18:33:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2020-08-22 18:33:02,804 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 108 [2020-08-22 18:33:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:02,804 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2020-08-22 18:33:02,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2020-08-22 18:33:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 18:33:02,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:02,807 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:02,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:33:02,807 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:02,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2129807001, now seen corresponding path program 2 times [2020-08-22 18:33:02,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:02,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098750850] [2020-08-22 18:33:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:02,810 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 18:33:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 18:33:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 18:33:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:02,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098750850] [2020-08-22 18:33:02,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:02,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:02,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229903612] [2020-08-22 18:33:02,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:02,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:02,931 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand 6 states. [2020-08-22 18:33:03,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:03,040 INFO L93 Difference]: Finished difference Result 348 states and 416 transitions. [2020-08-22 18:33:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:33:03,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-08-22 18:33:03,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:03,043 INFO L225 Difference]: With dead ends: 348 [2020-08-22 18:33:03,043 INFO L226 Difference]: Without dead ends: 218 [2020-08-22 18:33:03,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-08-22 18:33:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2020-08-22 18:33:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 18:33:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-08-22 18:33:03,067 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-08-22 18:33:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:03,067 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-08-22 18:33:03,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-08-22 18:33:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 18:33:03,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:03,070 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:03,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:33:03,070 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash -902449205, now seen corresponding path program 1 times [2020-08-22 18:33:03,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:03,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236273556] [2020-08-22 18:33:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:03,073 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 18:33:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 18:33:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 18:33:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:03,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236273556] [2020-08-22 18:33:03,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:03,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:03,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619923688] [2020-08-22 18:33:03,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:03,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:03,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:03,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:03,232 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 6 states. [2020-08-22 18:33:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:03,351 INFO L93 Difference]: Finished difference Result 342 states and 410 transitions. [2020-08-22 18:33:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:33:03,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-08-22 18:33:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:03,354 INFO L225 Difference]: With dead ends: 342 [2020-08-22 18:33:03,354 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 18:33:03,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 18:33:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-08-22 18:33:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 18:33:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-08-22 18:33:03,376 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-08-22 18:33:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:03,376 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-08-22 18:33:03,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-08-22 18:33:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 18:33:03,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:03,379 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:03,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 18:33:03,379 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 139965841, now seen corresponding path program 3 times [2020-08-22 18:33:03,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:03,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364504875] [2020-08-22 18:33:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:03,382 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 18:33:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 18:33:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 18:33:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:03,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364504875] [2020-08-22 18:33:03,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:03,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:03,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314185520] [2020-08-22 18:33:03,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:03,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:03,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:03,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:03,494 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 7 states. [2020-08-22 18:33:03,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:03,612 INFO L93 Difference]: Finished difference Result 375 states and 449 transitions. [2020-08-22 18:33:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:33:03,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-08-22 18:33:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:03,615 INFO L225 Difference]: With dead ends: 375 [2020-08-22 18:33:03,616 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 18:33:03,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 18:33:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 196. [2020-08-22 18:33:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 18:33:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-08-22 18:33:03,638 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-08-22 18:33:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:03,638 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-08-22 18:33:03,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-08-22 18:33:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 18:33:03,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:03,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:03,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 18:33:03,641 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1402676931, now seen corresponding path program 2 times [2020-08-22 18:33:03,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:03,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918314415] [2020-08-22 18:33:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:03,644 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 18:33:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 18:33:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 18:33:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:03,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918314415] [2020-08-22 18:33:03,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:03,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:03,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129043582] [2020-08-22 18:33:03,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:03,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:03,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:03,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:03,800 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 7 states. [2020-08-22 18:33:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:03,938 INFO L93 Difference]: Finished difference Result 361 states and 435 transitions. [2020-08-22 18:33:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:33:03,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-08-22 18:33:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:03,941 INFO L225 Difference]: With dead ends: 361 [2020-08-22 18:33:03,942 INFO L226 Difference]: Without dead ends: 228 [2020-08-22 18:33:03,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-08-22 18:33:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2020-08-22 18:33:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 18:33:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-08-22 18:33:03,967 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-08-22 18:33:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:03,968 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-08-22 18:33:03,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-08-22 18:33:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 18:33:03,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:03,971 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:03,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 18:33:03,971 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -229056103, now seen corresponding path program 4 times [2020-08-22 18:33:03,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:03,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223524244] [2020-08-22 18:33:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:03,974 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 18:33:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 18:33:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 18:33:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:04,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223524244] [2020-08-22 18:33:04,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:04,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:33:04,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784219047] [2020-08-22 18:33:04,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:33:04,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:33:04,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:04,112 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 8 states. [2020-08-22 18:33:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:04,266 INFO L93 Difference]: Finished difference Result 402 states and 482 transitions. [2020-08-22 18:33:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 18:33:04,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-08-22 18:33:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:04,269 INFO L225 Difference]: With dead ends: 402 [2020-08-22 18:33:04,270 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 18:33:04,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 18:33:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 206. [2020-08-22 18:33:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 18:33:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-08-22 18:33:04,302 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-08-22 18:33:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:04,303 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-08-22 18:33:04,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:33:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-08-22 18:33:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 18:33:04,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:04,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:04,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 18:33:04,307 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1033654987, now seen corresponding path program 3 times [2020-08-22 18:33:04,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:04,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234442718] [2020-08-22 18:33:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:04,310 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 18:33:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 18:33:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 18:33:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:04,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234442718] [2020-08-22 18:33:04,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:04,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:33:04,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19596880] [2020-08-22 18:33:04,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:33:04,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:33:04,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:04,502 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 8 states. [2020-08-22 18:33:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:04,667 INFO L93 Difference]: Finished difference Result 380 states and 460 transitions. [2020-08-22 18:33:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 18:33:04,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-08-22 18:33:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:04,670 INFO L225 Difference]: With dead ends: 380 [2020-08-22 18:33:04,671 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 18:33:04,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 18:33:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2020-08-22 18:33:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 18:33:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-08-22 18:33:04,702 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-08-22 18:33:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:04,703 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-08-22 18:33:04,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:33:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-08-22 18:33:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 18:33:04,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:04,705 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:04,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 18:33:04,706 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:04,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1138358929, now seen corresponding path program 5 times [2020-08-22 18:33:04,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:04,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860961277] [2020-08-22 18:33:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:04,709 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 18:33:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 18:33:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 18:33:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:04,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860961277] [2020-08-22 18:33:04,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:04,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 18:33:04,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117274130] [2020-08-22 18:33:04,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 18:33:04,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 18:33:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:04,858 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 9 states. [2020-08-22 18:33:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:05,014 INFO L93 Difference]: Finished difference Result 429 states and 515 transitions. [2020-08-22 18:33:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:05,017 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-08-22 18:33:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:05,019 INFO L225 Difference]: With dead ends: 429 [2020-08-22 18:33:05,019 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 18:33:05,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 18:33:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2020-08-22 18:33:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 18:33:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-08-22 18:33:05,048 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-08-22 18:33:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:05,048 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-08-22 18:33:05,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 18:33:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-08-22 18:33:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 18:33:05,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:05,051 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:05,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 18:33:05,051 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:05,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1893897277, now seen corresponding path program 4 times [2020-08-22 18:33:05,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:05,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352739105] [2020-08-22 18:33:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:05,055 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 18:33:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 18:33:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 18:33:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:05,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352739105] [2020-08-22 18:33:05,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:05,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 18:33:05,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192340346] [2020-08-22 18:33:05,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 18:33:05,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 18:33:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:05,263 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 9 states. [2020-08-22 18:33:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:05,457 INFO L93 Difference]: Finished difference Result 399 states and 485 transitions. [2020-08-22 18:33:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:05,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-08-22 18:33:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:05,460 INFO L225 Difference]: With dead ends: 399 [2020-08-22 18:33:05,461 INFO L226 Difference]: Without dead ends: 256 [2020-08-22 18:33:05,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-22 18:33:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2020-08-22 18:33:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 18:33:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-08-22 18:33:05,486 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-08-22 18:33:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:05,486 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-08-22 18:33:05,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 18:33:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-08-22 18:33:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 18:33:05,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:05,489 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:05,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 18:33:05,490 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1450818713, now seen corresponding path program 6 times [2020-08-22 18:33:05,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:05,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159200654] [2020-08-22 18:33:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:05,494 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:33:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 18:33:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 18:33:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:05,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159200654] [2020-08-22 18:33:05,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:05,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:05,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88215588] [2020-08-22 18:33:05,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:05,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:05,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:05,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:05,676 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 10 states. [2020-08-22 18:33:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:05,930 INFO L93 Difference]: Finished difference Result 456 states and 548 transitions. [2020-08-22 18:33:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 18:33:05,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-22 18:33:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:05,934 INFO L225 Difference]: With dead ends: 456 [2020-08-22 18:33:05,934 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 18:33:05,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 18:33:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2020-08-22 18:33:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 18:33:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-08-22 18:33:05,972 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-08-22 18:33:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:05,973 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-08-22 18:33:05,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-08-22 18:33:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 18:33:05,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:05,977 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:05,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 18:33:05,978 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:05,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1581437493, now seen corresponding path program 5 times [2020-08-22 18:33:05,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:05,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425710490] [2020-08-22 18:33:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:05,992 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:33:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 18:33:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 18:33:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:06,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425710490] [2020-08-22 18:33:06,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:06,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:06,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288582922] [2020-08-22 18:33:06,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:06,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:06,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:06,334 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 10 states. [2020-08-22 18:33:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:06,592 INFO L93 Difference]: Finished difference Result 418 states and 510 transitions. [2020-08-22 18:33:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 18:33:06,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-22 18:33:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:06,596 INFO L225 Difference]: With dead ends: 418 [2020-08-22 18:33:06,596 INFO L226 Difference]: Without dead ends: 270 [2020-08-22 18:33:06,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-08-22 18:33:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 226. [2020-08-22 18:33:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 18:33:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-08-22 18:33:06,625 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-08-22 18:33:06,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:06,626 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-08-22 18:33:06,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-08-22 18:33:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 18:33:06,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:06,628 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:06,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 18:33:06,629 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 688521105, now seen corresponding path program 7 times [2020-08-22 18:33:06,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:06,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919860245] [2020-08-22 18:33:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:06,632 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 18:33:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 18:33:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 18:33:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:06,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919860245] [2020-08-22 18:33:06,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:06,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:33:06,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220378896] [2020-08-22 18:33:06,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:33:06,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:06,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:33:06,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:06,833 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 11 states. [2020-08-22 18:33:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:06,993 INFO L93 Difference]: Finished difference Result 483 states and 581 transitions. [2020-08-22 18:33:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:06,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-08-22 18:33:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:06,997 INFO L225 Difference]: With dead ends: 483 [2020-08-22 18:33:06,998 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 18:33:07,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 18:33:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 236. [2020-08-22 18:33:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 18:33:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-08-22 18:33:07,025 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-08-22 18:33:07,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:07,025 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-08-22 18:33:07,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:33:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-08-22 18:33:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 18:33:07,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:07,028 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:07,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 18:33:07,028 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1951232195, now seen corresponding path program 6 times [2020-08-22 18:33:07,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:07,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103154218] [2020-08-22 18:33:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:07,031 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 18:33:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 18:33:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 18:33:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:07,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103154218] [2020-08-22 18:33:07,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:07,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:33:07,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177176558] [2020-08-22 18:33:07,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:33:07,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:33:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:07,282 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 11 states. [2020-08-22 18:33:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:07,545 INFO L93 Difference]: Finished difference Result 437 states and 535 transitions. [2020-08-22 18:33:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:07,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-08-22 18:33:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:07,548 INFO L225 Difference]: With dead ends: 437 [2020-08-22 18:33:07,548 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 18:33:07,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 18:33:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 236. [2020-08-22 18:33:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 18:33:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-08-22 18:33:07,577 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-08-22 18:33:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:07,577 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-08-22 18:33:07,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:33:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-08-22 18:33:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 18:33:07,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:07,580 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:07,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 18:33:07,580 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1216030823, now seen corresponding path program 8 times [2020-08-22 18:33:07,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:07,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528178136] [2020-08-22 18:33:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:07,582 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 18:33:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 18:33:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 18:33:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:07,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528178136] [2020-08-22 18:33:07,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:07,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 18:33:07,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907205868] [2020-08-22 18:33:07,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 18:33:07,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 18:33:07,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:07,891 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 12 states. [2020-08-22 18:33:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:08,175 INFO L93 Difference]: Finished difference Result 510 states and 614 transitions. [2020-08-22 18:33:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 18:33:08,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-22 18:33:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:08,178 INFO L225 Difference]: With dead ends: 510 [2020-08-22 18:33:08,179 INFO L226 Difference]: Without dead ends: 350 [2020-08-22 18:33:08,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-08-22 18:33:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 246. [2020-08-22 18:33:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 18:33:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-08-22 18:33:08,211 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-08-22 18:33:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:08,211 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-08-22 18:33:08,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 18:33:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-08-22 18:33:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 18:33:08,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:08,214 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:08,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 18:33:08,215 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash 46680267, now seen corresponding path program 7 times [2020-08-22 18:33:08,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:08,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055466484] [2020-08-22 18:33:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:08,218 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 18:33:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 18:33:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 18:33:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:08,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055466484] [2020-08-22 18:33:08,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:08,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 18:33:08,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282778484] [2020-08-22 18:33:08,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 18:33:08,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 18:33:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:08,593 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 12 states. [2020-08-22 18:33:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:08,954 INFO L93 Difference]: Finished difference Result 456 states and 560 transitions. [2020-08-22 18:33:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 18:33:08,954 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-22 18:33:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:08,957 INFO L225 Difference]: With dead ends: 456 [2020-08-22 18:33:08,958 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 18:33:08,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 18:33:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2020-08-22 18:33:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 18:33:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-08-22 18:33:08,983 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-08-22 18:33:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:08,984 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-08-22 18:33:08,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 18:33:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-08-22 18:33:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 18:33:08,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:08,987 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:08,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 18:33:08,988 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash -910703471, now seen corresponding path program 9 times [2020-08-22 18:33:08,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:08,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709477036] [2020-08-22 18:33:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:08,991 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 18:33:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 18:33:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 18:33:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:09,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709477036] [2020-08-22 18:33:09,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:09,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 18:33:09,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280439772] [2020-08-22 18:33:09,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 18:33:09,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:09,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 18:33:09,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:09,211 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 13 states. [2020-08-22 18:33:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:09,417 INFO L93 Difference]: Finished difference Result 537 states and 647 transitions. [2020-08-22 18:33:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:33:09,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-08-22 18:33:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:09,420 INFO L225 Difference]: With dead ends: 537 [2020-08-22 18:33:09,421 INFO L226 Difference]: Without dead ends: 372 [2020-08-22 18:33:09,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-08-22 18:33:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 256. [2020-08-22 18:33:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 18:33:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-08-22 18:33:09,448 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-08-22 18:33:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:09,449 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-08-22 18:33:09,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 18:33:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-08-22 18:33:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 18:33:09,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:09,451 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:09,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 18:33:09,452 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:09,452 INFO L82 PathProgramCache]: Analyzing trace with hash 352007619, now seen corresponding path program 8 times [2020-08-22 18:33:09,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:09,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000657727] [2020-08-22 18:33:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:09,455 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 18:33:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 18:33:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 18:33:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:09,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000657727] [2020-08-22 18:33:09,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:09,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 18:33:09,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61851888] [2020-08-22 18:33:09,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 18:33:09,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:09,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 18:33:09,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:09,821 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 13 states. [2020-08-22 18:33:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:10,207 INFO L93 Difference]: Finished difference Result 475 states and 585 transitions. [2020-08-22 18:33:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:33:10,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-08-22 18:33:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:10,210 INFO L225 Difference]: With dead ends: 475 [2020-08-22 18:33:10,211 INFO L226 Difference]: Without dead ends: 312 [2020-08-22 18:33:10,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-08-22 18:33:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 256. [2020-08-22 18:33:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 18:33:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-08-22 18:33:10,244 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-08-22 18:33:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:10,245 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-08-22 18:33:10,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 18:33:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-08-22 18:33:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-22 18:33:10,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:10,247 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:10,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 18:33:10,248 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:10,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1515572583, now seen corresponding path program 10 times [2020-08-22 18:33:10,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:10,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213473209] [2020-08-22 18:33:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:10,252 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 18:33:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 18:33:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 18:33:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:10,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213473209] [2020-08-22 18:33:10,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:10,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:33:10,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838853687] [2020-08-22 18:33:10,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:33:10,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:10,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:33:10,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:10,483 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 14 states. [2020-08-22 18:33:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:10,693 INFO L93 Difference]: Finished difference Result 564 states and 680 transitions. [2020-08-22 18:33:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 18:33:10,694 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-08-22 18:33:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:10,697 INFO L225 Difference]: With dead ends: 564 [2020-08-22 18:33:10,697 INFO L226 Difference]: Without dead ends: 394 [2020-08-22 18:33:10,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-22 18:33:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 266. [2020-08-22 18:33:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 18:33:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-08-22 18:33:10,730 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-08-22 18:33:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:10,731 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-08-22 18:33:10,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:33:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-08-22 18:33:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-22 18:33:10,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:10,734 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:10,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 18:33:10,736 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:10,736 INFO L82 PathProgramCache]: Analyzing trace with hash -252861493, now seen corresponding path program 9 times [2020-08-22 18:33:10,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:10,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549935576] [2020-08-22 18:33:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:10,740 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 18:33:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 18:33:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 18:33:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:11,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549935576] [2020-08-22 18:33:11,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:11,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:33:11,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407093443] [2020-08-22 18:33:11,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:33:11,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:33:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:11,068 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 14 states. [2020-08-22 18:33:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:11,508 INFO L93 Difference]: Finished difference Result 494 states and 610 transitions. [2020-08-22 18:33:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 18:33:11,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-08-22 18:33:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:11,511 INFO L225 Difference]: With dead ends: 494 [2020-08-22 18:33:11,512 INFO L226 Difference]: Without dead ends: 326 [2020-08-22 18:33:11,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:11,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-22 18:33:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 266. [2020-08-22 18:33:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 18:33:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-08-22 18:33:11,546 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-08-22 18:33:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:11,546 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-08-22 18:33:11,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:33:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-08-22 18:33:11,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 18:33:11,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:11,550 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:11,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 18:33:11,550 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash 867387793, now seen corresponding path program 11 times [2020-08-22 18:33:11,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:11,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055272122] [2020-08-22 18:33:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:11,554 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 18:33:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 18:33:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 18:33:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:11,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055272122] [2020-08-22 18:33:11,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:11,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 18:33:11,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650314452] [2020-08-22 18:33:11,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 18:33:11,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:11,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 18:33:11,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:11,854 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 15 states. [2020-08-22 18:33:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:12,148 INFO L93 Difference]: Finished difference Result 591 states and 713 transitions. [2020-08-22 18:33:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 18:33:12,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-08-22 18:33:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:12,152 INFO L225 Difference]: With dead ends: 591 [2020-08-22 18:33:12,152 INFO L226 Difference]: Without dead ends: 416 [2020-08-22 18:33:12,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-22 18:33:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 276. [2020-08-22 18:33:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 18:33:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-08-22 18:33:12,194 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-08-22 18:33:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:12,194 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-08-22 18:33:12,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 18:33:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-08-22 18:33:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 18:33:12,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:12,199 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:12,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 18:33:12,200 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2130098883, now seen corresponding path program 10 times [2020-08-22 18:33:12,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:12,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464510673] [2020-08-22 18:33:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:12,205 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 18:33:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 18:33:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 18:33:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:12,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464510673] [2020-08-22 18:33:12,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:12,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 18:33:12,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435936624] [2020-08-22 18:33:12,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 18:33:12,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 18:33:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:12,549 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 15 states. [2020-08-22 18:33:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:13,107 INFO L93 Difference]: Finished difference Result 513 states and 635 transitions. [2020-08-22 18:33:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 18:33:13,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-08-22 18:33:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:13,110 INFO L225 Difference]: With dead ends: 513 [2020-08-22 18:33:13,110 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 18:33:13,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 18:33:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 276. [2020-08-22 18:33:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 18:33:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-08-22 18:33:13,141 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-08-22 18:33:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:13,141 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-08-22 18:33:13,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 18:33:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-08-22 18:33:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 18:33:13,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:13,144 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:13,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 18:33:13,144 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash 890883481, now seen corresponding path program 12 times [2020-08-22 18:33:13,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:13,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194475186] [2020-08-22 18:33:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:13,147 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 18:33:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-22 18:33:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 18:33:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:13,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194475186] [2020-08-22 18:33:13,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:13,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 18:33:13,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824142564] [2020-08-22 18:33:13,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 18:33:13,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 18:33:13,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:13,443 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 16 states. [2020-08-22 18:33:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:13,693 INFO L93 Difference]: Finished difference Result 618 states and 746 transitions. [2020-08-22 18:33:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 18:33:13,694 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-08-22 18:33:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:13,697 INFO L225 Difference]: With dead ends: 618 [2020-08-22 18:33:13,697 INFO L226 Difference]: Without dead ends: 438 [2020-08-22 18:33:13,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-08-22 18:33:13,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2020-08-22 18:33:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 18:33:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-08-22 18:33:13,728 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-08-22 18:33:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:13,728 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-08-22 18:33:13,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 18:33:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-08-22 18:33:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 18:33:13,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:13,731 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:13,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 18:33:13,732 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2141372725, now seen corresponding path program 11 times [2020-08-22 18:33:13,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:13,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788395003] [2020-08-22 18:33:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:13,734 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 18:33:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-22 18:33:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 18:33:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:14,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788395003] [2020-08-22 18:33:14,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:14,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 18:33:14,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474706889] [2020-08-22 18:33:14,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 18:33:14,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 18:33:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:14,115 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 16 states. [2020-08-22 18:33:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:14,652 INFO L93 Difference]: Finished difference Result 532 states and 660 transitions. [2020-08-22 18:33:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 18:33:14,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-08-22 18:33:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:14,655 INFO L225 Difference]: With dead ends: 532 [2020-08-22 18:33:14,655 INFO L226 Difference]: Without dead ends: 354 [2020-08-22 18:33:14,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-22 18:33:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 286. [2020-08-22 18:33:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 18:33:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-08-22 18:33:14,689 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-08-22 18:33:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:14,689 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-08-22 18:33:14,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 18:33:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-08-22 18:33:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 18:33:14,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:14,692 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:14,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 18:33:14,692 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1892454033, now seen corresponding path program 13 times [2020-08-22 18:33:14,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:14,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23474049] [2020-08-22 18:33:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:14,695 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 18:33:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 18:33:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 18:33:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:14,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23474049] [2020-08-22 18:33:14,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:14,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 18:33:14,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10240266] [2020-08-22 18:33:14,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 18:33:14,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 18:33:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:14,986 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 17 states. [2020-08-22 18:33:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:15,303 INFO L93 Difference]: Finished difference Result 645 states and 779 transitions. [2020-08-22 18:33:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:33:15,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-08-22 18:33:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:15,307 INFO L225 Difference]: With dead ends: 645 [2020-08-22 18:33:15,307 INFO L226 Difference]: Without dead ends: 460 [2020-08-22 18:33:15,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-08-22 18:33:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 296. [2020-08-22 18:33:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 18:33:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-08-22 18:33:15,338 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-08-22 18:33:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:15,338 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-08-22 18:33:15,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 18:33:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-08-22 18:33:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 18:33:15,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:15,341 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:15,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 18:33:15,341 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:15,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1139802173, now seen corresponding path program 12 times [2020-08-22 18:33:15,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:15,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329446866] [2020-08-22 18:33:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:15,343 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 18:33:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 18:33:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 18:33:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:15,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329446866] [2020-08-22 18:33:15,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:15,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 18:33:15,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226230934] [2020-08-22 18:33:15,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 18:33:15,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 18:33:15,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:15,768 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 17 states. [2020-08-22 18:33:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:16,304 INFO L93 Difference]: Finished difference Result 551 states and 685 transitions. [2020-08-22 18:33:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:33:16,305 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-08-22 18:33:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:16,307 INFO L225 Difference]: With dead ends: 551 [2020-08-22 18:33:16,307 INFO L226 Difference]: Without dead ends: 368 [2020-08-22 18:33:16,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-22 18:33:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 296. [2020-08-22 18:33:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 18:33:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-08-22 18:33:16,338 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-08-22 18:33:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:16,339 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-08-22 18:33:16,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 18:33:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-08-22 18:33:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 18:33:16,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:16,342 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:16,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 18:33:16,342 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash -33314663, now seen corresponding path program 14 times [2020-08-22 18:33:16,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:16,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133160388] [2020-08-22 18:33:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:16,344 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-22 18:33:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 18:33:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 18:33:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:16,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133160388] [2020-08-22 18:33:16,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:16,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 18:33:16,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821183801] [2020-08-22 18:33:16,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 18:33:16,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:16,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 18:33:16,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:16,665 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 18 states. [2020-08-22 18:33:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:17,015 INFO L93 Difference]: Finished difference Result 672 states and 812 transitions. [2020-08-22 18:33:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 18:33:17,016 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-08-22 18:33:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:17,020 INFO L225 Difference]: With dead ends: 672 [2020-08-22 18:33:17,021 INFO L226 Difference]: Without dead ends: 482 [2020-08-22 18:33:17,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-08-22 18:33:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 306. [2020-08-22 18:33:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 18:33:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-08-22 18:33:17,056 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-08-22 18:33:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:17,057 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-08-22 18:33:17,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 18:33:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-08-22 18:33:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 18:33:17,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:17,060 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:17,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 18:33:17,060 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1229396427, now seen corresponding path program 13 times [2020-08-22 18:33:17,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:17,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691592295] [2020-08-22 18:33:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:17,064 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-22 18:33:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 18:33:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 18:33:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:17,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691592295] [2020-08-22 18:33:17,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:17,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 18:33:17,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413126962] [2020-08-22 18:33:17,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 18:33:17,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:17,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 18:33:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:17,480 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 18 states. [2020-08-22 18:33:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:18,027 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2020-08-22 18:33:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 18:33:18,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-08-22 18:33:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:18,031 INFO L225 Difference]: With dead ends: 570 [2020-08-22 18:33:18,031 INFO L226 Difference]: Without dead ends: 382 [2020-08-22 18:33:18,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-08-22 18:33:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 306. [2020-08-22 18:33:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 18:33:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-08-22 18:33:18,063 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-08-22 18:33:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:18,064 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-08-22 18:33:18,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 18:33:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-08-22 18:33:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-22 18:33:18,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:18,067 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:18,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 18:33:18,067 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2032954479, now seen corresponding path program 15 times [2020-08-22 18:33:18,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:18,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899312548] [2020-08-22 18:33:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:18,069 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 18:33:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 18:33:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-22 18:33:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-22 18:33:18,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899312548] [2020-08-22 18:33:18,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:18,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:33:18,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243429074] [2020-08-22 18:33:18,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:33:18,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:18,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:33:18,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:33:18,153 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 3 states. [2020-08-22 18:33:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:18,187 INFO L93 Difference]: Finished difference Result 321 states and 393 transitions. [2020-08-22 18:33:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:33:18,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2020-08-22 18:33:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:18,189 INFO L225 Difference]: With dead ends: 321 [2020-08-22 18:33:18,189 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 18:33:18,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:33:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 18:33:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2020-08-22 18:33:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-22 18:33:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2020-08-22 18:33:18,225 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 178 [2020-08-22 18:33:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:18,226 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2020-08-22 18:33:18,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:33:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2020-08-22 18:33:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 18:33:18,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:18,228 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:18,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 18:33:18,229 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash 368593816, now seen corresponding path program 1 times [2020-08-22 18:33:18,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:18,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725610367] [2020-08-22 18:33:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:18,232 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 18:33:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 18:33:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 18:33:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-22 18:33:18,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725610367] [2020-08-22 18:33:18,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:18,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:33:18,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724447275] [2020-08-22 18:33:18,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:33:18,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:33:18,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:33:18,311 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand 4 states. [2020-08-22 18:33:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:18,356 INFO L93 Difference]: Finished difference Result 321 states and 392 transitions. [2020-08-22 18:33:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 18:33:18,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-08-22 18:33:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:18,358 INFO L225 Difference]: With dead ends: 321 [2020-08-22 18:33:18,358 INFO L226 Difference]: Without dead ends: 304 [2020-08-22 18:33:18,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-22 18:33:18,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-08-22 18:33:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 18:33:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2020-08-22 18:33:18,388 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 372 transitions. Word has length 180 [2020-08-22 18:33:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:18,389 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 372 transitions. [2020-08-22 18:33:18,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:33:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 372 transitions. [2020-08-22 18:33:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 18:33:18,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:18,391 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:18,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 18:33:18,391 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1683689272, now seen corresponding path program 1 times [2020-08-22 18:33:18,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:18,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691179134] [2020-08-22 18:33:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:18,402 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 18:33:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 18:33:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 18:33:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:18,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691179134] [2020-08-22 18:33:18,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:18,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 18:33:18,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421985750] [2020-08-22 18:33:18,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 18:33:18,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:18,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 18:33:18,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:18,735 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. Second operand 19 states. [2020-08-22 18:33:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:19,133 INFO L93 Difference]: Finished difference Result 695 states and 837 transitions. [2020-08-22 18:33:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 18:33:19,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-08-22 18:33:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:19,136 INFO L225 Difference]: With dead ends: 695 [2020-08-22 18:33:19,136 INFO L226 Difference]: Without dead ends: 502 [2020-08-22 18:33:19,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-08-22 18:33:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 314. [2020-08-22 18:33:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-22 18:33:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-08-22 18:33:19,168 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-08-22 18:33:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:19,169 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-08-22 18:33:19,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 18:33:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-08-22 18:33:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 18:33:19,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:19,171 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:19,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 18:33:19,171 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash -326698006, now seen corresponding path program 1 times [2020-08-22 18:33:19,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:19,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962416924] [2020-08-22 18:33:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:19,174 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 18:33:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 18:33:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 18:33:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:19,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962416924] [2020-08-22 18:33:19,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:19,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 18:33:19,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106216590] [2020-08-22 18:33:19,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 18:33:19,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 18:33:19,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:19,629 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 19 states. [2020-08-22 18:33:20,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:20,255 INFO L93 Difference]: Finished difference Result 585 states and 727 transitions. [2020-08-22 18:33:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 18:33:20,256 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-08-22 18:33:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:20,259 INFO L225 Difference]: With dead ends: 585 [2020-08-22 18:33:20,259 INFO L226 Difference]: Without dead ends: 394 [2020-08-22 18:33:20,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-22 18:33:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 314. [2020-08-22 18:33:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-22 18:33:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-08-22 18:33:20,292 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-08-22 18:33:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:20,293 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-08-22 18:33:20,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 18:33:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-08-22 18:33:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 18:33:20,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:20,295 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:20,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 18:33:20,295 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1714201280, now seen corresponding path program 2 times [2020-08-22 18:33:20,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:20,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972081291] [2020-08-22 18:33:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:20,298 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 18:33:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-22 18:33:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-22 18:33:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:20,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972081291] [2020-08-22 18:33:20,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:20,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 18:33:20,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984726784] [2020-08-22 18:33:20,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 18:33:20,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 18:33:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:20,712 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 20 states. [2020-08-22 18:33:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:21,072 INFO L93 Difference]: Finished difference Result 722 states and 870 transitions. [2020-08-22 18:33:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 18:33:21,073 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-08-22 18:33:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:21,076 INFO L225 Difference]: With dead ends: 722 [2020-08-22 18:33:21,076 INFO L226 Difference]: Without dead ends: 524 [2020-08-22 18:33:21,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-08-22 18:33:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 324. [2020-08-22 18:33:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 18:33:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-08-22 18:33:21,112 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-08-22 18:33:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:21,112 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-08-22 18:33:21,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 18:33:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-08-22 18:33:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 18:33:21,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:21,114 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:21,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 18:33:21,115 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash 570378738, now seen corresponding path program 2 times [2020-08-22 18:33:21,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:21,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857680468] [2020-08-22 18:33:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:21,117 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 18:33:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-22 18:33:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-22 18:33:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:21,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857680468] [2020-08-22 18:33:21,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:21,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 18:33:21,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142917148] [2020-08-22 18:33:21,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 18:33:21,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:21,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 18:33:21,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:21,609 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 20 states. [2020-08-22 18:33:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:22,382 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2020-08-22 18:33:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 18:33:22,383 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-08-22 18:33:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:22,385 INFO L225 Difference]: With dead ends: 604 [2020-08-22 18:33:22,385 INFO L226 Difference]: Without dead ends: 408 [2020-08-22 18:33:22,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-08-22 18:33:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 324. [2020-08-22 18:33:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 18:33:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-08-22 18:33:22,420 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-08-22 18:33:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:22,421 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-08-22 18:33:22,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 18:33:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-08-22 18:33:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 18:33:22,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:22,423 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:22,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 18:33:22,423 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:22,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:22,424 INFO L82 PathProgramCache]: Analyzing trace with hash 922915896, now seen corresponding path program 3 times [2020-08-22 18:33:22,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:22,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905526168] [2020-08-22 18:33:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:22,425 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 18:33:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 18:33:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 18:33:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:22,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905526168] [2020-08-22 18:33:22,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:22,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-08-22 18:33:22,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812841889] [2020-08-22 18:33:22,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 18:33:22,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 18:33:22,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:22,823 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 21 states. [2020-08-22 18:33:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:23,236 INFO L93 Difference]: Finished difference Result 749 states and 903 transitions. [2020-08-22 18:33:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 18:33:23,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-08-22 18:33:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:23,243 INFO L225 Difference]: With dead ends: 749 [2020-08-22 18:33:23,243 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 18:33:23,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:33:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 18:33:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 334. [2020-08-22 18:33:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 18:33:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-08-22 18:33:23,281 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-08-22 18:33:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:23,281 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-08-22 18:33:23,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 18:33:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-08-22 18:33:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 18:33:23,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:23,283 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:23,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 18:33:23,284 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1087471382, now seen corresponding path program 3 times [2020-08-22 18:33:23,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:23,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771585581] [2020-08-22 18:33:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:23,287 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 18:33:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 18:33:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 18:33:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:23,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771585581] [2020-08-22 18:33:23,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:23,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-08-22 18:33:23,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853523042] [2020-08-22 18:33:23,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 18:33:23,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:23,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 18:33:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:23,856 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 21 states. [2020-08-22 18:33:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:24,739 INFO L93 Difference]: Finished difference Result 623 states and 777 transitions. [2020-08-22 18:33:24,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 18:33:24,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-08-22 18:33:24,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:24,743 INFO L225 Difference]: With dead ends: 623 [2020-08-22 18:33:24,743 INFO L226 Difference]: Without dead ends: 422 [2020-08-22 18:33:24,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:33:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-08-22 18:33:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 334. [2020-08-22 18:33:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 18:33:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-08-22 18:33:24,780 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-08-22 18:33:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:24,781 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-08-22 18:33:24,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 18:33:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-08-22 18:33:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 18:33:24,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:24,783 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:24,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 18:33:24,783 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1276573760, now seen corresponding path program 4 times [2020-08-22 18:33:24,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:24,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699646524] [2020-08-22 18:33:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:24,785 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:25,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 18:33:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:25,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-22 18:33:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:25,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 18:33:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:25,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699646524] [2020-08-22 18:33:25,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:25,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 18:33:25,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075707425] [2020-08-22 18:33:25,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 18:33:25,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:25,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 18:33:25,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:33:25,289 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 22 states. [2020-08-22 18:33:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:25,644 INFO L93 Difference]: Finished difference Result 776 states and 936 transitions. [2020-08-22 18:33:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 18:33:25,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-08-22 18:33:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:25,649 INFO L225 Difference]: With dead ends: 776 [2020-08-22 18:33:25,649 INFO L226 Difference]: Without dead ends: 568 [2020-08-22 18:33:25,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 18:33:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-08-22 18:33:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2020-08-22 18:33:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 18:33:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-08-22 18:33:25,690 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-08-22 18:33:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:25,690 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-08-22 18:33:25,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 18:33:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-08-22 18:33:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 18:33:25,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:25,692 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:25,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 18:33:25,692 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -733813518, now seen corresponding path program 4 times [2020-08-22 18:33:25,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:25,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867917660] [2020-08-22 18:33:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:25,695 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:25,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:25,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:25,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 18:33:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-22 18:33:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 18:33:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:26,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867917660] [2020-08-22 18:33:26,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:26,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 18:33:26,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198484803] [2020-08-22 18:33:26,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 18:33:26,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:26,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 18:33:26,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:33:26,272 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 22 states. [2020-08-22 18:33:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:27,176 INFO L93 Difference]: Finished difference Result 642 states and 802 transitions. [2020-08-22 18:33:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 18:33:27,177 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-08-22 18:33:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:27,180 INFO L225 Difference]: With dead ends: 642 [2020-08-22 18:33:27,180 INFO L226 Difference]: Without dead ends: 436 [2020-08-22 18:33:27,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 18:33:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-08-22 18:33:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 344. [2020-08-22 18:33:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 18:33:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-08-22 18:33:27,218 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-08-22 18:33:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:27,219 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-08-22 18:33:27,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 18:33:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-08-22 18:33:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 18:33:27,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:27,221 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:27,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 18:33:27,221 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:27,222 INFO L82 PathProgramCache]: Analyzing trace with hash -171452104, now seen corresponding path program 5 times [2020-08-22 18:33:27,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:27,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638447633] [2020-08-22 18:33:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:27,223 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 18:33:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 18:33:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 18:33:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:27,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638447633] [2020-08-22 18:33:27,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:27,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 18:33:27,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771236202] [2020-08-22 18:33:27,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 18:33:27,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 18:33:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 18:33:27,686 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 23 states. [2020-08-22 18:33:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:28,169 INFO L93 Difference]: Finished difference Result 803 states and 969 transitions. [2020-08-22 18:33:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 18:33:28,177 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-08-22 18:33:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:28,181 INFO L225 Difference]: With dead ends: 803 [2020-08-22 18:33:28,181 INFO L226 Difference]: Without dead ends: 590 [2020-08-22 18:33:28,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 18:33:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-08-22 18:33:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 354. [2020-08-22 18:33:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-08-22 18:33:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-08-22 18:33:28,222 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-08-22 18:33:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:28,222 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-08-22 18:33:28,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 18:33:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-08-22 18:33:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 18:33:28,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:28,224 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:28,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 18:33:28,225 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2113127914, now seen corresponding path program 5 times [2020-08-22 18:33:28,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:28,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876739160] [2020-08-22 18:33:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:28,227 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 18:33:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 18:33:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 18:33:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:28,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876739160] [2020-08-22 18:33:28,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:28,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 18:33:28,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968723773] [2020-08-22 18:33:28,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 18:33:28,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:28,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 18:33:28,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 18:33:28,822 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 23 states. [2020-08-22 18:33:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:30,017 INFO L93 Difference]: Finished difference Result 661 states and 827 transitions. [2020-08-22 18:33:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 18:33:30,018 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-08-22 18:33:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:30,020 INFO L225 Difference]: With dead ends: 661 [2020-08-22 18:33:30,020 INFO L226 Difference]: Without dead ends: 450 [2020-08-22 18:33:30,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 18:33:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-22 18:33:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 354. [2020-08-22 18:33:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-08-22 18:33:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-08-22 18:33:30,062 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-08-22 18:33:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:30,062 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-08-22 18:33:30,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 18:33:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-08-22 18:33:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 18:33:30,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:30,065 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:30,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 18:33:30,065 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1093348544, now seen corresponding path program 6 times [2020-08-22 18:33:30,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:30,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855155116] [2020-08-22 18:33:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:30,067 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-22 18:33:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 18:33:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 18:33:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:30,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855155116] [2020-08-22 18:33:30,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:30,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 18:33:30,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653232024] [2020-08-22 18:33:30,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 18:33:30,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:30,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 18:33:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 18:33:30,554 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 24 states. [2020-08-22 18:33:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:31,006 INFO L93 Difference]: Finished difference Result 830 states and 1002 transitions. [2020-08-22 18:33:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 18:33:31,009 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-08-22 18:33:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:31,012 INFO L225 Difference]: With dead ends: 830 [2020-08-22 18:33:31,013 INFO L226 Difference]: Without dead ends: 612 [2020-08-22 18:33:31,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:33:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-08-22 18:33:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 364. [2020-08-22 18:33:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-08-22 18:33:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-08-22 18:33:31,063 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-08-22 18:33:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:31,063 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-08-22 18:33:31,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 18:33:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-08-22 18:33:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 18:33:31,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:31,066 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:31,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 18:33:31,066 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1191231474, now seen corresponding path program 6 times [2020-08-22 18:33:31,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:31,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884878651] [2020-08-22 18:33:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:31,069 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-22 18:33:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 18:33:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 18:33:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:31,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884878651] [2020-08-22 18:33:31,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:31,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 18:33:31,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572841655] [2020-08-22 18:33:31,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 18:33:31,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 18:33:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 18:33:31,817 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 24 states. [2020-08-22 18:33:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:32,853 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2020-08-22 18:33:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 18:33:32,854 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-08-22 18:33:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:32,857 INFO L225 Difference]: With dead ends: 680 [2020-08-22 18:33:32,858 INFO L226 Difference]: Without dead ends: 464 [2020-08-22 18:33:32,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:33:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-08-22 18:33:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 364. [2020-08-22 18:33:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-08-22 18:33:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-08-22 18:33:32,895 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-08-22 18:33:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:32,895 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-08-22 18:33:32,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 18:33:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-08-22 18:33:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 18:33:32,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:32,897 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:32,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 18:33:32,898 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1719328312, now seen corresponding path program 7 times [2020-08-22 18:33:32,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:32,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275748541] [2020-08-22 18:33:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:32,900 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 18:33:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 18:33:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 18:33:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:33,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275748541] [2020-08-22 18:33:33,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:33,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-08-22 18:33:33,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25336540] [2020-08-22 18:33:33,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 18:33:33,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:33,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 18:33:33,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:33:33,524 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 25 states. [2020-08-22 18:33:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:34,114 INFO L93 Difference]: Finished difference Result 857 states and 1035 transitions. [2020-08-22 18:33:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 18:33:34,114 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-08-22 18:33:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:34,118 INFO L225 Difference]: With dead ends: 857 [2020-08-22 18:33:34,118 INFO L226 Difference]: Without dead ends: 634 [2020-08-22 18:33:34,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-08-22 18:33:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 374. [2020-08-22 18:33:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-08-22 18:33:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-08-22 18:33:34,164 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-08-22 18:33:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:34,165 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-08-22 18:33:34,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 18:33:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-08-22 18:33:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 18:33:34,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:34,167 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:34,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 18:33:34,167 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash -291058966, now seen corresponding path program 7 times [2020-08-22 18:33:34,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:34,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852322294] [2020-08-22 18:33:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:34,170 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 18:33:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 18:33:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 18:33:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:34,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852322294] [2020-08-22 18:33:34,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:34,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-08-22 18:33:34,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406907910] [2020-08-22 18:33:34,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 18:33:34,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:34,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 18:33:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:33:34,878 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 25 states. [2020-08-22 18:33:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:35,987 INFO L93 Difference]: Finished difference Result 699 states and 877 transitions. [2020-08-22 18:33:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 18:33:35,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-08-22 18:33:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:35,991 INFO L225 Difference]: With dead ends: 699 [2020-08-22 18:33:35,991 INFO L226 Difference]: Without dead ends: 478 [2020-08-22 18:33:35,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-08-22 18:33:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 374. [2020-08-22 18:33:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-08-22 18:33:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-08-22 18:33:36,039 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-08-22 18:33:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:36,039 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-08-22 18:33:36,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 18:33:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-08-22 18:33:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 18:33:36,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:36,041 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:36,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 18:33:36,042 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1312616000, now seen corresponding path program 8 times [2020-08-22 18:33:36,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:36,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119054449] [2020-08-22 18:33:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:36,044 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:36,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:36,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:36,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:36,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-22 18:33:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:36,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-22 18:33:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:36,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 18:33:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:36,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119054449] [2020-08-22 18:33:36,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:36,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 18:33:36,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99312462] [2020-08-22 18:33:36,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 18:33:36,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:36,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 18:33:36,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:36,596 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 26 states. [2020-08-22 18:33:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:37,076 INFO L93 Difference]: Finished difference Result 884 states and 1068 transitions. [2020-08-22 18:33:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 18:33:37,077 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-08-22 18:33:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:37,081 INFO L225 Difference]: With dead ends: 884 [2020-08-22 18:33:37,081 INFO L226 Difference]: Without dead ends: 656 [2020-08-22 18:33:37,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 18:33:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-22 18:33:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 384. [2020-08-22 18:33:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 18:33:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-08-22 18:33:37,130 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-08-22 18:33:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:37,130 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-08-22 18:33:37,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 18:33:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-08-22 18:33:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 18:33:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:37,133 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:37,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 18:33:37,133 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash -697771278, now seen corresponding path program 8 times [2020-08-22 18:33:37,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:37,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765228248] [2020-08-22 18:33:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:37,135 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-22 18:33:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-22 18:33:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 18:33:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:37,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765228248] [2020-08-22 18:33:37,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:37,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 18:33:37,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002325990] [2020-08-22 18:33:37,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 18:33:37,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:37,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 18:33:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:37,972 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 26 states. [2020-08-22 18:33:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:39,328 INFO L93 Difference]: Finished difference Result 718 states and 902 transitions. [2020-08-22 18:33:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 18:33:39,329 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-08-22 18:33:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:39,331 INFO L225 Difference]: With dead ends: 718 [2020-08-22 18:33:39,331 INFO L226 Difference]: Without dead ends: 492 [2020-08-22 18:33:39,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 18:33:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-22 18:33:39,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 384. [2020-08-22 18:33:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 18:33:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-08-22 18:33:39,370 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-08-22 18:33:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:39,371 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-08-22 18:33:39,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 18:33:39,371 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-08-22 18:33:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-22 18:33:39,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:39,372 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:39,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 18:33:39,373 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1256956728, now seen corresponding path program 9 times [2020-08-22 18:33:39,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:39,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197867636] [2020-08-22 18:33:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:39,375 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 18:33:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 18:33:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 18:33:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:39,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197867636] [2020-08-22 18:33:39,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:39,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-08-22 18:33:39,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966821591] [2020-08-22 18:33:39,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 18:33:39,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 18:33:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 18:33:39,985 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 27 states. [2020-08-22 18:33:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:40,587 INFO L93 Difference]: Finished difference Result 911 states and 1101 transitions. [2020-08-22 18:33:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 18:33:40,587 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-08-22 18:33:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:40,591 INFO L225 Difference]: With dead ends: 911 [2020-08-22 18:33:40,592 INFO L226 Difference]: Without dead ends: 678 [2020-08-22 18:33:40,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 18:33:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-08-22 18:33:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 394. [2020-08-22 18:33:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 18:33:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-08-22 18:33:40,640 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-08-22 18:33:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:40,640 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-08-22 18:33:40,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 18:33:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-08-22 18:33:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-22 18:33:40,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:40,642 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:40,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 18:33:40,643 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash -753430550, now seen corresponding path program 9 times [2020-08-22 18:33:40,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:40,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085738871] [2020-08-22 18:33:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:40,645 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 18:33:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 18:33:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 18:33:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:41,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085738871] [2020-08-22 18:33:41,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:41,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-08-22 18:33:41,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568684767] [2020-08-22 18:33:41,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 18:33:41,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:41,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 18:33:41,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 18:33:41,436 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 27 states. [2020-08-22 18:33:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:42,928 INFO L93 Difference]: Finished difference Result 737 states and 927 transitions. [2020-08-22 18:33:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 18:33:42,929 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-08-22 18:33:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:42,931 INFO L225 Difference]: With dead ends: 737 [2020-08-22 18:33:42,931 INFO L226 Difference]: Without dead ends: 506 [2020-08-22 18:33:42,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-22 18:33:42,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-22 18:33:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 394. [2020-08-22 18:33:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 18:33:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-08-22 18:33:42,969 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-08-22 18:33:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:42,969 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-08-22 18:33:42,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 18:33:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-08-22 18:33:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-22 18:33:42,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:42,971 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:42,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 18:33:42,971 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash -629192384, now seen corresponding path program 10 times [2020-08-22 18:33:42,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:42,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031192224] [2020-08-22 18:33:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:42,973 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:43,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031192224] [2020-08-22 18:33:43,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:43,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-08-22 18:33:43,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260131882] [2020-08-22 18:33:43,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 18:33:43,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 18:33:43,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 18:33:43,612 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 28 states. [2020-08-22 18:33:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:44,248 INFO L93 Difference]: Finished difference Result 938 states and 1134 transitions. [2020-08-22 18:33:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 18:33:44,248 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 225 [2020-08-22 18:33:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:44,252 INFO L225 Difference]: With dead ends: 938 [2020-08-22 18:33:44,252 INFO L226 Difference]: Without dead ends: 700 [2020-08-22 18:33:44,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2020-08-22 18:33:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-08-22 18:33:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 404. [2020-08-22 18:33:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-08-22 18:33:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 502 transitions. [2020-08-22 18:33:44,305 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 502 transitions. Word has length 225 [2020-08-22 18:33:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:44,306 INFO L479 AbstractCegarLoop]: Abstraction has 404 states and 502 transitions. [2020-08-22 18:33:44,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 18:33:44,306 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 502 transitions. [2020-08-22 18:33:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-22 18:33:44,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:44,307 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:44,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 18:33:44,308 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:44,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1655387634, now seen corresponding path program 10 times [2020-08-22 18:33:44,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:44,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708504087] [2020-08-22 18:33:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:44,310 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:44,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708504087] [2020-08-22 18:33:44,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:44,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:44,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039586777] [2020-08-22 18:33:44,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:44,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:44,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:44,604 INFO L87 Difference]: Start difference. First operand 404 states and 502 transitions. Second operand 10 states. [2020-08-22 18:33:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:44,957 INFO L93 Difference]: Finished difference Result 459 states and 581 transitions. [2020-08-22 18:33:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:44,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 225 [2020-08-22 18:33:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:44,964 INFO L225 Difference]: With dead ends: 459 [2020-08-22 18:33:44,965 INFO L226 Difference]: Without dead ends: 453 [2020-08-22 18:33:44,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-08-22 18:33:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2020-08-22 18:33:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-08-22 18:33:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2020-08-22 18:33:45,039 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 225 [2020-08-22 18:33:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:45,040 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2020-08-22 18:33:45,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2020-08-22 18:33:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-22 18:33:45,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:45,043 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:45,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 18:33:45,043 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash -131719239, now seen corresponding path program 1 times [2020-08-22 18:33:45,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:45,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694498911] [2020-08-22 18:33:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:45,045 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:45,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694498911] [2020-08-22 18:33:45,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:45,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 18:33:45,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272621069] [2020-08-22 18:33:45,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 18:33:45,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 18:33:45,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:45,372 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand 12 states. [2020-08-22 18:33:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:45,689 INFO L93 Difference]: Finished difference Result 459 states and 579 transitions. [2020-08-22 18:33:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:45,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 227 [2020-08-22 18:33:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:45,692 INFO L225 Difference]: With dead ends: 459 [2020-08-22 18:33:45,692 INFO L226 Difference]: Without dead ends: 452 [2020-08-22 18:33:45,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-22 18:33:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-08-22 18:33:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-08-22 18:33:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 549 transitions. [2020-08-22 18:33:45,764 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 549 transitions. Word has length 227 [2020-08-22 18:33:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:45,764 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 549 transitions. [2020-08-22 18:33:45,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 18:33:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 549 transitions. [2020-08-22 18:33:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-22 18:33:45,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:45,767 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:45,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 18:33:45,768 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1678288039, now seen corresponding path program 1 times [2020-08-22 18:33:45,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:45,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937660910] [2020-08-22 18:33:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:45,770 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-22 18:33:45,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937660910] [2020-08-22 18:33:45,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:45,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:45,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006174486] [2020-08-22 18:33:45,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:45,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:45,888 INFO L87 Difference]: Start difference. First operand 438 states and 549 transitions. Second operand 6 states. [2020-08-22 18:33:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:45,998 INFO L93 Difference]: Finished difference Result 444 states and 554 transitions. [2020-08-22 18:33:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:45,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 227 [2020-08-22 18:33:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:46,002 INFO L225 Difference]: With dead ends: 444 [2020-08-22 18:33:46,002 INFO L226 Difference]: Without dead ends: 432 [2020-08-22 18:33:46,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-08-22 18:33:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2020-08-22 18:33:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-08-22 18:33:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 541 transitions. [2020-08-22 18:33:46,088 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 541 transitions. Word has length 227 [2020-08-22 18:33:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:46,089 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 541 transitions. [2020-08-22 18:33:46,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 541 transitions. [2020-08-22 18:33:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-22 18:33:46,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:46,092 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:46,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 18:33:46,092 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:46,093 INFO L82 PathProgramCache]: Analyzing trace with hash 947853182, now seen corresponding path program 1 times [2020-08-22 18:33:46,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:46,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143523171] [2020-08-22 18:33:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:46,096 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 18:33:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 18:33:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 18:33:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 18:33:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:46,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143523171] [2020-08-22 18:33:46,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:46,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:46,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469756123] [2020-08-22 18:33:46,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:46,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:46,255 INFO L87 Difference]: Start difference. First operand 432 states and 541 transitions. Second operand 5 states. [2020-08-22 18:33:46,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:46,406 INFO L93 Difference]: Finished difference Result 691 states and 868 transitions. [2020-08-22 18:33:46,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:33:46,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2020-08-22 18:33:46,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:46,409 INFO L225 Difference]: With dead ends: 691 [2020-08-22 18:33:46,409 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 18:33:46,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 18:33:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 263. [2020-08-22 18:33:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-08-22 18:33:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 327 transitions. [2020-08-22 18:33:46,451 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 327 transitions. Word has length 230 [2020-08-22 18:33:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:46,451 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 327 transitions. [2020-08-22 18:33:46,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 327 transitions. [2020-08-22 18:33:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-08-22 18:33:46,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:46,453 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:46,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 18:33:46,453 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:46,454 INFO L82 PathProgramCache]: Analyzing trace with hash -671277925, now seen corresponding path program 1 times [2020-08-22 18:33:46,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:46,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301330577] [2020-08-22 18:33:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:46,455 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 18:33:46,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301330577] [2020-08-22 18:33:46,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:46,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:33:46,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419511351] [2020-08-22 18:33:46,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:33:46,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:46,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:33:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:46,711 INFO L87 Difference]: Start difference. First operand 263 states and 327 transitions. Second operand 8 states. [2020-08-22 18:33:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:46,847 INFO L93 Difference]: Finished difference Result 317 states and 389 transitions. [2020-08-22 18:33:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:46,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 236 [2020-08-22 18:33:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:46,850 INFO L225 Difference]: With dead ends: 317 [2020-08-22 18:33:46,850 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 18:33:46,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 18:33:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 269. [2020-08-22 18:33:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-08-22 18:33:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-08-22 18:33:46,904 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 236 [2020-08-22 18:33:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:46,904 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-08-22 18:33:46,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:33:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-08-22 18:33:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-08-22 18:33:46,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:46,908 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:46,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 18:33:46,908 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash 287100319, now seen corresponding path program 1 times [2020-08-22 18:33:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:46,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439615081] [2020-08-22 18:33:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:46,911 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-22 18:33:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 18:33:47,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439615081] [2020-08-22 18:33:47,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:47,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 18:33:47,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388605614] [2020-08-22 18:33:47,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 18:33:47,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:47,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 18:33:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:47,240 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 13 states. [2020-08-22 18:33:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:47,580 INFO L93 Difference]: Finished difference Result 346 states and 421 transitions. [2020-08-22 18:33:47,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 18:33:47,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 240 [2020-08-22 18:33:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:47,583 INFO L225 Difference]: With dead ends: 346 [2020-08-22 18:33:47,583 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 18:33:47,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 18:33:47,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 308. [2020-08-22 18:33:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-08-22 18:33:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 379 transitions. [2020-08-22 18:33:47,644 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 379 transitions. Word has length 240 [2020-08-22 18:33:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:47,647 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 379 transitions. [2020-08-22 18:33:47,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 18:33:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 379 transitions. [2020-08-22 18:33:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-08-22 18:33:47,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:47,650 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:47,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 18:33:47,651 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1150729662, now seen corresponding path program 1 times [2020-08-22 18:33:47,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:47,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869183996] [2020-08-22 18:33:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:47,658 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-22 18:33:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 18:33:47,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869183996] [2020-08-22 18:33:47,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:47,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:47,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854638799] [2020-08-22 18:33:47,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:47,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:47,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:47,904 INFO L87 Difference]: Start difference. First operand 308 states and 379 transitions. Second operand 10 states. [2020-08-22 18:33:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:48,180 INFO L93 Difference]: Finished difference Result 320 states and 390 transitions. [2020-08-22 18:33:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:48,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 243 [2020-08-22 18:33:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:48,182 INFO L225 Difference]: With dead ends: 320 [2020-08-22 18:33:48,182 INFO L226 Difference]: Without dead ends: 294 [2020-08-22 18:33:48,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-08-22 18:33:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 265. [2020-08-22 18:33:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 18:33:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 302 transitions. [2020-08-22 18:33:48,227 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 302 transitions. Word has length 243 [2020-08-22 18:33:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:48,227 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 302 transitions. [2020-08-22 18:33:48,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 302 transitions. [2020-08-22 18:33:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-08-22 18:33:48,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:48,229 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:48,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 18:33:48,230 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash 661117091, now seen corresponding path program 2 times [2020-08-22 18:33:48,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:48,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777688081] [2020-08-22 18:33:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:48,232 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-22 18:33:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-08-22 18:33:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 18:33:48,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777688081] [2020-08-22 18:33:48,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:48,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:33:48,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254506559] [2020-08-22 18:33:48,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:33:48,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:33:48,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:48,583 INFO L87 Difference]: Start difference. First operand 265 states and 302 transitions. Second operand 11 states. [2020-08-22 18:33:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:48,843 INFO L93 Difference]: Finished difference Result 333 states and 378 transitions. [2020-08-22 18:33:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:48,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 244 [2020-08-22 18:33:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:48,846 INFO L225 Difference]: With dead ends: 333 [2020-08-22 18:33:48,846 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 18:33:48,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 18:33:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-08-22 18:33:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-22 18:33:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 305 transitions. [2020-08-22 18:33:48,899 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 305 transitions. Word has length 244 [2020-08-22 18:33:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:48,899 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 305 transitions. [2020-08-22 18:33:48,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:33:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 305 transitions. [2020-08-22 18:33:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-08-22 18:33:48,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:48,902 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:48,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 18:33:48,902 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:48,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:48,902 INFO L82 PathProgramCache]: Analyzing trace with hash -229943887, now seen corresponding path program 1 times [2020-08-22 18:33:48,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:48,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374408306] [2020-08-22 18:33:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:48,905 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 18:33:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 18:33:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 18:33:49,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374408306] [2020-08-22 18:33:49,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:49,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:33:49,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859717861] [2020-08-22 18:33:49,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:33:49,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:49,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:33:49,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:49,358 INFO L87 Difference]: Start difference. First operand 268 states and 305 transitions. Second operand 14 states. [2020-08-22 18:33:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:49,786 INFO L93 Difference]: Finished difference Result 324 states and 366 transitions. [2020-08-22 18:33:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 18:33:49,787 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 245 [2020-08-22 18:33:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:49,789 INFO L225 Difference]: With dead ends: 324 [2020-08-22 18:33:49,790 INFO L226 Difference]: Without dead ends: 312 [2020-08-22 18:33:49,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-08-22 18:33:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2020-08-22 18:33:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 18:33:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 346 transitions. [2020-08-22 18:33:49,849 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 346 transitions. Word has length 245 [2020-08-22 18:33:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:49,851 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 346 transitions. [2020-08-22 18:33:49,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:33:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 346 transitions. [2020-08-22 18:33:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-08-22 18:33:49,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:49,854 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:49,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 18:33:49,854 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:49,854 INFO L82 PathProgramCache]: Analyzing trace with hash 818281555, now seen corresponding path program 1 times [2020-08-22 18:33:49,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:49,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265019797] [2020-08-22 18:33:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:49,857 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 18:33:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-22 18:33:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 18:33:50,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265019797] [2020-08-22 18:33:50,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:50,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:33:50,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815039943] [2020-08-22 18:33:50,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:33:50,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:50,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:33:50,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:50,389 INFO L87 Difference]: Start difference. First operand 304 states and 346 transitions. Second operand 11 states. [2020-08-22 18:33:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:50,670 INFO L93 Difference]: Finished difference Result 316 states and 357 transitions. [2020-08-22 18:33:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 18:33:50,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 246 [2020-08-22 18:33:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:50,673 INFO L225 Difference]: With dead ends: 316 [2020-08-22 18:33:50,673 INFO L226 Difference]: Without dead ends: 275 [2020-08-22 18:33:50,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:50,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-08-22 18:33:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2020-08-22 18:33:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-22 18:33:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 304 transitions. [2020-08-22 18:33:50,724 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 304 transitions. Word has length 246 [2020-08-22 18:33:50,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:50,724 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 304 transitions. [2020-08-22 18:33:50,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:33:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 304 transitions. [2020-08-22 18:33:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-08-22 18:33:50,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:50,726 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:50,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 18:33:50,726 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -360487828, now seen corresponding path program 1 times [2020-08-22 18:33:50,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:50,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163986460] [2020-08-22 18:33:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:50,728 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 18:33:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 18:33:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 18:33:51,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163986460] [2020-08-22 18:33:51,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:51,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 18:33:51,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054539344] [2020-08-22 18:33:51,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 18:33:51,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 18:33:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:51,146 INFO L87 Difference]: Start difference. First operand 268 states and 304 transitions. Second operand 12 states. [2020-08-22 18:33:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:51,550 INFO L93 Difference]: Finished difference Result 268 states and 304 transitions. [2020-08-22 18:33:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:33:51,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 248 [2020-08-22 18:33:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:51,552 INFO L225 Difference]: With dead ends: 268 [2020-08-22 18:33:51,552 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 18:33:51,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 18:33:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 18:33:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 18:33:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 18:33:51,555 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 248 [2020-08-22 18:33:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:51,555 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 18:33:51,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 18:33:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 18:33:51,556 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 18:33:51,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 18:33:51,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 18:33:52,415 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 18:33:55,200 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 492 DAG size of output: 4 [2020-08-22 18:33:58,931 WARN L193 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 561 DAG size of output: 4 [2020-08-22 18:33:59,479 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 4 [2020-08-22 18:33:59,799 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 4 [2020-08-22 18:34:01,359 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 427 DAG size of output: 4 [2020-08-22 18:34:02,293 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 4 [2020-08-22 18:34:05,160 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 526 DAG size of output: 4 [2020-08-22 18:34:05,358 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 4 [2020-08-22 18:34:08,995 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 592 DAG size of output: 4 [2020-08-22 18:34:09,284 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 18:34:11,004 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 459 DAG size of output: 4 [2020-08-22 18:34:11,648 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 4 [2020-08-22 18:34:12,051 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 4 [2020-08-22 18:34:12,257 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 4 [2020-08-22 18:34:15,631 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 592 DAG size of output: 4 [2020-08-22 18:34:16,003 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 137 [2020-08-22 18:34:17,332 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 396 DAG size of output: 4 [2020-08-22 18:34:18,264 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 4 [2020-08-22 18:34:18,397 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 4 [2020-08-22 18:34:22,237 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 601 DAG size of output: 8 [2020-08-22 18:34:22,536 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 18:34:22,833 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 18:34:23,310 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 18:34:25,862 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 499 DAG size of output: 4 [2020-08-22 18:34:29,681 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 568 DAG size of output: 4 [2020-08-22 18:34:30,292 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 4 [2020-08-22 18:34:30,656 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 4 [2020-08-22 18:34:32,678 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 434 DAG size of output: 4 [2020-08-22 18:34:33,670 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 4 [2020-08-22 18:34:36,722 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 533 DAG size of output: 4 [2020-08-22 18:34:36,945 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 4 [2020-08-22 18:34:42,876 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 571 DAG size of output: 4 [2020-08-22 18:34:43,187 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 18:34:45,410 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 466 DAG size of output: 4 [2020-08-22 18:34:46,176 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 4 [2020-08-22 18:34:46,664 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 4 [2020-08-22 18:34:46,932 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 4 [2020-08-22 18:34:53,090 WARN L193 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 571 DAG size of output: 4 [2020-08-22 18:34:54,835 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 403 DAG size of output: 4 [2020-08-22 18:34:56,033 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 373 DAG size of output: 4 [2020-08-22 18:34:56,176 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 4 [2020-08-22 18:35:02,137 WARN L193 SmtUtils]: Spent 5.96 s on a formula simplification. DAG size of input: 578 DAG size of output: 8 [2020-08-22 18:35:02,474 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 18:35:02,827 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 18:35:03,292 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:03,536 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 4 [2020-08-22 18:35:03,843 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 4 [2020-08-22 18:35:03,948 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 4 [2020-08-22 18:35:04,268 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 4 [2020-08-22 18:35:04,404 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 4 [2020-08-22 18:35:04,673 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 4 [2020-08-22 18:35:05,050 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 4 [2020-08-22 18:35:05,231 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:05,520 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 4 [2020-08-22 18:35:05,635 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 4 [2020-08-22 18:35:06,093 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 4 [2020-08-22 18:35:06,269 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:06,474 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 4 [2020-08-22 18:35:06,619 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 4 [2020-08-22 18:35:06,977 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 4 [2020-08-22 18:35:07,169 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:07,351 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:25,920 WARN L193 SmtUtils]: Spent 17.02 s on a formula simplification. DAG size of input: 1153 DAG size of output: 991 [2020-08-22 18:35:44,549 WARN L193 SmtUtils]: Spent 18.62 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 18:36:13,445 WARN L193 SmtUtils]: Spent 28.89 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 18:36:16,718 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 18:36:18,622 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 18:36:18,978 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-08-22 18:36:29,435 WARN L193 SmtUtils]: Spent 10.45 s on a formula simplification. DAG size of input: 829 DAG size of output: 9 [2020-08-22 18:36:35,352 WARN L193 SmtUtils]: Spent 5.92 s on a formula simplification. DAG size of input: 653 DAG size of output: 9 [2020-08-22 18:36:57,708 WARN L193 SmtUtils]: Spent 22.35 s on a formula simplification. DAG size of input: 1024 DAG size of output: 9 [2020-08-22 18:36:58,722 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 353 DAG size of output: 9 [2020-08-22 18:36:58,905 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-08-22 18:37:32,247 WARN L193 SmtUtils]: Spent 33.34 s on a formula simplification. DAG size of input: 1135 DAG size of output: 9 [2020-08-22 18:37:48,449 WARN L193 SmtUtils]: Spent 16.20 s on a formula simplification. DAG size of input: 1153 DAG size of output: 991 [2020-08-22 18:38:01,714 WARN L193 SmtUtils]: Spent 13.24 s on a formula simplification. DAG size of input: 892 DAG size of output: 9 [2020-08-22 18:38:06,121 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 598 DAG size of output: 9 [2020-08-22 18:38:08,479 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 494 DAG size of output: 9 [2020-08-22 18:38:09,822 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 398 DAG size of output: 9 [2020-08-22 18:38:41,439 WARN L193 SmtUtils]: Spent 31.61 s on a formula simplification. DAG size of input: 1135 DAG size of output: 9 [2020-08-22 18:39:01,054 WARN L193 SmtUtils]: Spent 19.61 s on a formula simplification. DAG size of input: 1495 DAG size of output: 9 [2020-08-22 18:39:01,518 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-08-22 18:39:10,606 WARN L193 SmtUtils]: Spent 9.08 s on a formula simplification. DAG size of input: 768 DAG size of output: 9 [2020-08-22 18:39:17,723 WARN L193 SmtUtils]: Spent 7.12 s on a formula simplification. DAG size of input: 709 DAG size of output: 9 [2020-08-22 18:39:18,395 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 9 [2020-08-22 18:39:48,474 WARN L193 SmtUtils]: Spent 30.08 s on a formula simplification. DAG size of input: 1153 DAG size of output: 11 [2020-08-22 18:40:04,815 WARN L193 SmtUtils]: Spent 16.33 s on a formula simplification. DAG size of input: 1151 DAG size of output: 989 [2020-08-22 18:40:21,128 WARN L193 SmtUtils]: Spent 16.31 s on a formula simplification. DAG size of input: 1153 DAG size of output: 991 [2020-08-22 18:40:21,246 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-08-22 18:40:39,015 WARN L193 SmtUtils]: Spent 16.88 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997 [2020-08-22 18:40:56,723 WARN L193 SmtUtils]: Spent 17.70 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 18:41:24,424 WARN L193 SmtUtils]: Spent 27.70 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 18:41:28,160 WARN L193 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 18:41:30,037 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 18:41:30,394 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-08-22 18:41:41,072 WARN L193 SmtUtils]: Spent 10.60 s on a formula simplification. DAG size of input: 829 DAG size of output: 9 [2020-08-22 18:41:46,972 WARN L193 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 653 DAG size of output: 9 [2020-08-22 18:42:09,124 WARN L193 SmtUtils]: Spent 22.15 s on a formula simplification. DAG size of input: 1024 DAG size of output: 9 [2020-08-22 18:42:10,096 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 9 [2020-08-22 18:42:10,279 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-08-22 18:42:43,059 WARN L193 SmtUtils]: Spent 32.78 s on a formula simplification. DAG size of input: 1138 DAG size of output: 9 [2020-08-22 18:43:00,783 WARN L193 SmtUtils]: Spent 17.72 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997 [2020-08-22 18:43:15,158 WARN L193 SmtUtils]: Spent 14.36 s on a formula simplification. DAG size of input: 892 DAG size of output: 9 [2020-08-22 18:43:19,819 WARN L193 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 598 DAG size of output: 9 [2020-08-22 18:43:22,288 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 494 DAG size of output: 9 [2020-08-22 18:43:23,658 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 398 DAG size of output: 9 [2020-08-22 18:43:55,210 WARN L193 SmtUtils]: Spent 31.55 s on a formula simplification. DAG size of input: 1138 DAG size of output: 9 [2020-08-22 18:44:15,808 WARN L193 SmtUtils]: Spent 20.59 s on a formula simplification. DAG size of input: 1498 DAG size of output: 9 [2020-08-22 18:44:16,284 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-08-22 18:44:25,121 WARN L193 SmtUtils]: Spent 8.83 s on a formula simplification. DAG size of input: 768 DAG size of output: 9 [2020-08-22 18:44:32,173 WARN L193 SmtUtils]: Spent 7.05 s on a formula simplification. DAG size of input: 709 DAG size of output: 9 [2020-08-22 18:44:32,856 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 9 [2020-08-22 18:45:05,494 WARN L193 SmtUtils]: Spent 32.64 s on a formula simplification. DAG size of input: 1158 DAG size of output: 11 [2020-08-22 18:45:23,200 WARN L193 SmtUtils]: Spent 17.70 s on a formula simplification. DAG size of input: 1156 DAG size of output: 995 [2020-08-22 18:45:40,482 WARN L193 SmtUtils]: Spent 17.28 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997 [2020-08-22 18:45:40,598 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-08-22 18:45:40,846 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 18:45:42,778 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 445 DAG size of output: 4 [2020-08-22 18:45:45,886 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 510 DAG size of output: 4 [2020-08-22 18:45:46,306 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 4 [2020-08-22 18:45:46,540 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 4 [2020-08-22 18:45:48,007 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 384 DAG size of output: 4 [2020-08-22 18:45:48,692 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 4 [2020-08-22 18:45:51,197 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 477 DAG size of output: 4 [2020-08-22 18:45:51,320 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 4 [2020-08-22 18:45:53,863 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 18:45:53,987 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 18:45:55,438 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 414 DAG size of output: 4 [2020-08-22 18:45:56,011 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 4 [2020-08-22 18:45:56,336 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 4 [2020-08-22 18:45:56,490 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 4 [2020-08-22 18:45:59,005 WARN L193 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 18:45:59,750 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 8 [2020-08-22 18:46:01,010 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 355 DAG size of output: 4 [2020-08-22 18:46:01,898 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 4 [2020-08-22 18:46:04,984 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 546 DAG size of output: 8 [2020-08-22 18:46:05,117 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 18:46:05,246 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 18:46:05,782 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 18:46:07,608 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 445 DAG size of output: 4 [2020-08-22 18:46:10,618 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 510 DAG size of output: 4 [2020-08-22 18:46:11,037 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 4 [2020-08-22 18:46:11,342 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 4 [2020-08-22 18:46:12,810 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 384 DAG size of output: 4 [2020-08-22 18:46:13,494 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 4 [2020-08-22 18:46:15,956 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 477 DAG size of output: 4 [2020-08-22 18:46:16,088 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 4 [2020-08-22 18:46:18,568 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 18:46:18,689 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 18:46:20,122 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 414 DAG size of output: 4 [2020-08-22 18:46:20,676 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 4 [2020-08-22 18:46:20,995 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 4 [2020-08-22 18:46:21,155 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 4 [2020-08-22 18:46:23,630 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 18:46:24,349 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 8 [2020-08-22 18:46:25,559 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 355 DAG size of output: 4 [2020-08-22 18:46:26,451 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 4 [2020-08-22 18:46:29,519 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 546 DAG size of output: 8 [2020-08-22 18:46:29,649 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 18:46:29,780 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 18:46:45,882 WARN L193 SmtUtils]: Spent 15.91 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997