/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:14:14,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:14:14,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:14:14,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:14:14,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:14:14,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:14:14,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:14:14,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:14:14,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:14:14,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:14:14,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:14:14,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:14:14,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:14:14,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:14:14,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:14:14,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:14:14,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:14:14,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:14:14,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:14:14,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:14:14,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:14:14,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:14:14,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:14:14,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:14:14,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:14:14,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:14:14,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:14:14,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:14:14,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:14:14,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:14:14,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:14:14,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:14:14,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:14:14,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:14:14,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:14:14,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:14:14,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:14:14,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:14:14,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:14:14,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:14:14,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:14:14,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:14:14,421 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:14:14,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:14:14,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:14:14,424 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:14:14,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:14:14,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:14:14,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:14:14,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:14:14,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:14:14,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:14:14,426 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:14:14,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:14:14,427 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:14:14,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:14:14,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:14:14,428 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:14:14,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:14:14,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:14:14,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:14:14,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:14:14,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:14:14,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:14:14,429 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 23:14:14,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:14:14,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:14:14,915 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:14:14,917 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:14:14,917 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:14:14,919 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-09-04 23:14:15,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4604128a5/b87ae1469e894ed397d0602b4687504d/FLAG9c0cae32b [2020-09-04 23:14:15,579 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:14:15,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-09-04 23:14:15,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4604128a5/b87ae1469e894ed397d0602b4687504d/FLAG9c0cae32b [2020-09-04 23:14:15,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4604128a5/b87ae1469e894ed397d0602b4687504d [2020-09-04 23:14:15,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:14:15,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:14:15,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:14:15,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:14:15,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:14:15,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:14:15" (1/1) ... [2020-09-04 23:14:15,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788ef5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:15, skipping insertion in model container [2020-09-04 23:14:15,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:14:15" (1/1) ... [2020-09-04 23:14:15,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:14:15,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:14:16,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:14:16,231 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:14:16,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:14:16,269 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:14:16,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16 WrapperNode [2020-09-04 23:14:16,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:14:16,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:14:16,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:14:16,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:14:16,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (1/1) ... [2020-09-04 23:14:16,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (1/1) ... [2020-09-04 23:14:16,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (1/1) ... [2020-09-04 23:14:16,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (1/1) ... [2020-09-04 23:14:16,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (1/1) ... [2020-09-04 23:14:16,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (1/1) ... [2020-09-04 23:14:16,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (1/1) ... [2020-09-04 23:14:16,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:14:16,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:14:16,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:14:16,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:14:16,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 23:14:16,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:14:16,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:14:16,476 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:14:16,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:14:16,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:14:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:14:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:14:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:14:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:14:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:14:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:14:16,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:14:16,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:14:16,770 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:14:16,771 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 23:14:16,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:14:16 BoogieIcfgContainer [2020-09-04 23:14:16,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:14:16,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:14:16,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:14:16,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:14:16,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:14:15" (1/3) ... [2020-09-04 23:14:16,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fcf078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:14:16, skipping insertion in model container [2020-09-04 23:14:16,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:16" (2/3) ... [2020-09-04 23:14:16,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fcf078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:14:16, skipping insertion in model container [2020-09-04 23:14:16,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:14:16" (3/3) ... [2020-09-04 23:14:16,811 INFO L109 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-09-04 23:14:16,838 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:14:16,849 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:14:16,869 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:14:16,895 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:14:16,895 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:14:16,895 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:14:16,896 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:14:16,896 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:14:16,896 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:14:16,896 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:14:16,896 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:14:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-09-04 23:14:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 23:14:16,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:16,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:16,928 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash -815601615, now seen corresponding path program 1 times [2020-09-04 23:14:16,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:16,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821131843] [2020-09-04 23:14:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:17,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821131843] [2020-09-04 23:14:17,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:14:17,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 23:14:17,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414722577] [2020-09-04 23:14:17,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 23:14:17,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:17,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 23:14:17,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:14:17,130 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-09-04 23:14:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:17,169 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-09-04 23:14:17,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 23:14:17,171 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-09-04 23:14:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:17,182 INFO L225 Difference]: With dead ends: 76 [2020-09-04 23:14:17,183 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 23:14:17,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:14:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 23:14:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-04 23:14:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 23:14:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-04 23:14:17,243 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-04 23:14:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:17,244 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-04 23:14:17,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 23:14:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-04 23:14:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 23:14:17,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:17,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:17,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:14:17,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2089093357, now seen corresponding path program 1 times [2020-09-04 23:14:17,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:17,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430100626] [2020-09-04 23:14:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:17,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430100626] [2020-09-04 23:14:17,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:14:17,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:14:17,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790733442] [2020-09-04 23:14:17,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:14:17,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:14:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:14:17,429 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 5 states. [2020-09-04 23:14:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:17,499 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-09-04 23:14:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:14:17,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-09-04 23:14:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:17,502 INFO L225 Difference]: With dead ends: 51 [2020-09-04 23:14:17,503 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 23:14:17,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:14:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 23:14:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-09-04 23:14:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 23:14:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-04 23:14:17,521 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 28 [2020-09-04 23:14:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:17,521 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-04 23:14:17,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:14:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-04 23:14:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 23:14:17,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:17,524 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 23:14:17,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:14:17,524 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash -594427423, now seen corresponding path program 1 times [2020-09-04 23:14:17,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:17,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487623762] [2020-09-04 23:14:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-04 23:14:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:17,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487623762] [2020-09-04 23:14:17,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:14:17,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 23:14:17,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36148450] [2020-09-04 23:14:17,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:14:17,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:17,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:14:17,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:14:17,625 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-09-04 23:14:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:17,799 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-09-04 23:14:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:14:17,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-09-04 23:14:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:17,805 INFO L225 Difference]: With dead ends: 82 [2020-09-04 23:14:17,805 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 23:14:17,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:14:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 23:14:17,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-04 23:14:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 23:14:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-09-04 23:14:17,828 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 38 [2020-09-04 23:14:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:17,828 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-09-04 23:14:17,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:14:17,829 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-09-04 23:14:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 23:14:17,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:17,835 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 23:14:17,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:14:17,836 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1151378409, now seen corresponding path program 1 times [2020-09-04 23:14:17,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:17,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392703506] [2020-09-04 23:14:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-04 23:14:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:18,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392703506] [2020-09-04 23:14:18,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:18,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:14:18,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302991198] [2020-09-04 23:14:18,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:14:18,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:14:18,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:14:18,009 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-09-04 23:14:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:18,087 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-09-04 23:14:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:14:18,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-09-04 23:14:18,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:18,090 INFO L225 Difference]: With dead ends: 67 [2020-09-04 23:14:18,090 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 23:14:18,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:14:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 23:14:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-09-04 23:14:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 23:14:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-09-04 23:14:18,122 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 44 [2020-09-04 23:14:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:18,123 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-09-04 23:14:18,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:14:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-09-04 23:14:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 23:14:18,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:18,126 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:18,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:14:18,129 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:18,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1388174135, now seen corresponding path program 2 times [2020-09-04 23:14:18,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:18,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974093844] [2020-09-04 23:14:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-04 23:14:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 23:14:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 23:14:18,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974093844] [2020-09-04 23:14:18,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:18,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:14:18,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622810076] [2020-09-04 23:14:18,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:14:18,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:18,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:14:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:14:18,291 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 8 states. [2020-09-04 23:14:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:18,473 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-09-04 23:14:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 23:14:18,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-09-04 23:14:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:18,476 INFO L225 Difference]: With dead ends: 112 [2020-09-04 23:14:18,476 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 23:14:18,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:14:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 23:14:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2020-09-04 23:14:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 23:14:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-09-04 23:14:18,490 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 54 [2020-09-04 23:14:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:18,490 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-09-04 23:14:18,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:14:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-09-04 23:14:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 23:14:18,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:18,493 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:18,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:14:18,493 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:18,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1511501119, now seen corresponding path program 3 times [2020-09-04 23:14:18,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:18,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970238539] [2020-09-04 23:14:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 23:14:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-04 23:14:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 23:14:18,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970238539] [2020-09-04 23:14:18,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:18,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:14:18,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453645388] [2020-09-04 23:14:18,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:14:18,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:18,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:14:18,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:14:18,607 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 9 states. [2020-09-04 23:14:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:18,827 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-09-04 23:14:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:14:18,827 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-09-04 23:14:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:18,830 INFO L225 Difference]: With dead ends: 126 [2020-09-04 23:14:18,831 INFO L226 Difference]: Without dead ends: 99 [2020-09-04 23:14:18,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:14:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-04 23:14:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-09-04 23:14:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 23:14:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-09-04 23:14:18,853 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 60 [2020-09-04 23:14:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:18,853 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-09-04 23:14:18,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:14:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-09-04 23:14:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-04 23:14:18,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:18,855 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:18,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:14:18,856 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:18,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1048435015, now seen corresponding path program 4 times [2020-09-04 23:14:18,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:18,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785992348] [2020-09-04 23:14:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 23:14:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-04 23:14:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 23:14:19,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785992348] [2020-09-04 23:14:19,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:19,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:14:19,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561929004] [2020-09-04 23:14:19,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:14:19,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:14:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:14:19,034 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 8 states. [2020-09-04 23:14:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:19,124 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-09-04 23:14:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:14:19,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-09-04 23:14:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:19,127 INFO L225 Difference]: With dead ends: 95 [2020-09-04 23:14:19,130 INFO L226 Difference]: Without dead ends: 93 [2020-09-04 23:14:19,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:14:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-04 23:14:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-09-04 23:14:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-04 23:14:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-09-04 23:14:19,151 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 66 [2020-09-04 23:14:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:19,152 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-09-04 23:14:19,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:14:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-09-04 23:14:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 23:14:19,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:19,155 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-09-04 23:14:19,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:14:19,156 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1426826083, now seen corresponding path program 5 times [2020-09-04 23:14:19,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:19,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646272265] [2020-09-04 23:14:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 23:14:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-04 23:14:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 23:14:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-04 23:14:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 23:14:19,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646272265] [2020-09-04 23:14:19,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:19,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:14:19,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958075444] [2020-09-04 23:14:19,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:14:19,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:14:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:14:19,385 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 12 states. [2020-09-04 23:14:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:19,673 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2020-09-04 23:14:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:14:19,674 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-09-04 23:14:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:19,676 INFO L225 Difference]: With dead ends: 168 [2020-09-04 23:14:19,676 INFO L226 Difference]: Without dead ends: 129 [2020-09-04 23:14:19,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:14:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-04 23:14:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2020-09-04 23:14:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 23:14:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-09-04 23:14:19,693 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 86 [2020-09-04 23:14:19,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:19,693 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-09-04 23:14:19,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:14:19,693 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-09-04 23:14:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-04 23:14:19,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:19,695 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:19,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:14:19,696 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:19,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1621404309, now seen corresponding path program 6 times [2020-09-04 23:14:19,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:19,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698323213] [2020-09-04 23:14:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 23:14:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-04 23:14:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-04 23:14:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-04 23:14:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 23:14:19,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698323213] [2020-09-04 23:14:19,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:19,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:14:19,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912911090] [2020-09-04 23:14:19,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:14:19,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:19,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:14:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:14:19,862 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 13 states. [2020-09-04 23:14:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:20,244 INFO L93 Difference]: Finished difference Result 182 states and 201 transitions. [2020-09-04 23:14:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 23:14:20,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 92 [2020-09-04 23:14:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:20,246 INFO L225 Difference]: With dead ends: 182 [2020-09-04 23:14:20,246 INFO L226 Difference]: Without dead ends: 143 [2020-09-04 23:14:20,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:14:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-04 23:14:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 100. [2020-09-04 23:14:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-04 23:14:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-04 23:14:20,261 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 92 [2020-09-04 23:14:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:20,262 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-04 23:14:20,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:14:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-04 23:14:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-04 23:14:20,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:20,264 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-09-04 23:14:20,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:14:20,264 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:20,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:20,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1859084659, now seen corresponding path program 7 times [2020-09-04 23:14:20,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:20,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381819928] [2020-09-04 23:14:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-04 23:14:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 23:14:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-04 23:14:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-04 23:14:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 78 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 23:14:20,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381819928] [2020-09-04 23:14:20,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:20,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:14:20,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290290311] [2020-09-04 23:14:20,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:14:20,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:20,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:14:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:14:20,397 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-09-04 23:14:20,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:20,488 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-09-04 23:14:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:14:20,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2020-09-04 23:14:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:20,490 INFO L225 Difference]: With dead ends: 123 [2020-09-04 23:14:20,491 INFO L226 Difference]: Without dead ends: 121 [2020-09-04 23:14:20,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:14:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-04 23:14:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2020-09-04 23:14:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-04 23:14:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2020-09-04 23:14:20,505 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 98 [2020-09-04 23:14:20,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:20,506 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2020-09-04 23:14:20,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:14:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2020-09-04 23:14:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-04 23:14:20,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:20,507 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:20,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:14:20,508 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1617732209, now seen corresponding path program 8 times [2020-09-04 23:14:20,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:20,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962566682] [2020-09-04 23:14:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-04 23:14:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 23:14:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-04 23:14:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-04 23:14:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-04 23:14:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-04 23:14:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-09-04 23:14:20,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962566682] [2020-09-04 23:14:20,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:20,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:14:20,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131478351] [2020-09-04 23:14:20,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:14:20,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:14:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:14:20,714 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 15 states. [2020-09-04 23:14:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:21,149 INFO L93 Difference]: Finished difference Result 224 states and 247 transitions. [2020-09-04 23:14:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 23:14:21,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 118 [2020-09-04 23:14:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:21,152 INFO L225 Difference]: With dead ends: 224 [2020-09-04 23:14:21,152 INFO L226 Difference]: Without dead ends: 173 [2020-09-04 23:14:21,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:14:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-04 23:14:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 122. [2020-09-04 23:14:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-04 23:14:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2020-09-04 23:14:21,172 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 118 [2020-09-04 23:14:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:21,173 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2020-09-04 23:14:21,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:14:21,175 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2020-09-04 23:14:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-04 23:14:21,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:21,177 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:21,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:14:21,177 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash -581374057, now seen corresponding path program 9 times [2020-09-04 23:14:21,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:21,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579373623] [2020-09-04 23:14:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-04 23:14:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-04 23:14:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-04 23:14:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-04 23:14:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-04 23:14:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-04 23:14:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 114 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-04 23:14:21,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579373623] [2020-09-04 23:14:21,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:21,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:14:21,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10089307] [2020-09-04 23:14:21,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:14:21,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:14:21,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:14:21,350 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand 11 states. [2020-09-04 23:14:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:21,468 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-09-04 23:14:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:14:21,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2020-09-04 23:14:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:21,471 INFO L225 Difference]: With dead ends: 139 [2020-09-04 23:14:21,471 INFO L226 Difference]: Without dead ends: 137 [2020-09-04 23:14:21,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:14:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-04 23:14:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2020-09-04 23:14:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 23:14:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-09-04 23:14:21,491 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 124 [2020-09-04 23:14:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:21,492 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-09-04 23:14:21,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:14:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-09-04 23:14:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-04 23:14:21,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:21,496 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:21,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:14:21,497 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1723472539, now seen corresponding path program 10 times [2020-09-04 23:14:21,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:21,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714332418] [2020-09-04 23:14:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-04 23:14:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-04 23:14:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-04 23:14:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-04 23:14:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-04 23:14:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-04 23:14:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-09-04 23:14:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 154 proven. 102 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-04 23:14:21,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714332418] [2020-09-04 23:14:21,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:21,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 23:14:21,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224127335] [2020-09-04 23:14:21,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 23:14:21,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 23:14:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:14:21,893 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 18 states. [2020-09-04 23:14:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:22,403 INFO L93 Difference]: Finished difference Result 254 states and 280 transitions. [2020-09-04 23:14:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 23:14:22,403 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 134 [2020-09-04 23:14:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:22,405 INFO L225 Difference]: With dead ends: 254 [2020-09-04 23:14:22,406 INFO L226 Difference]: Without dead ends: 197 [2020-09-04 23:14:22,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:14:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-04 23:14:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 138. [2020-09-04 23:14:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-04 23:14:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-09-04 23:14:22,422 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 134 [2020-09-04 23:14:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:22,423 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-09-04 23:14:22,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 23:14:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-09-04 23:14:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-04 23:14:22,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:22,425 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:22,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:14:22,425 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash 318138221, now seen corresponding path program 11 times [2020-09-04 23:14:22,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:22,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818953361] [2020-09-04 23:14:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-04 23:14:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-04 23:14:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-04 23:14:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-04 23:14:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-04 23:14:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-04 23:14:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-04 23:14:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 154 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-04 23:14:22,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818953361] [2020-09-04 23:14:22,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:22,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-04 23:14:22,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539788344] [2020-09-04 23:14:22,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 23:14:22,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 23:14:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:14:22,718 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 19 states. [2020-09-04 23:14:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:23,342 INFO L93 Difference]: Finished difference Result 268 states and 297 transitions. [2020-09-04 23:14:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 23:14:23,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 140 [2020-09-04 23:14:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:23,345 INFO L225 Difference]: With dead ends: 268 [2020-09-04 23:14:23,345 INFO L226 Difference]: Without dead ends: 211 [2020-09-04 23:14:23,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:14:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-04 23:14:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2020-09-04 23:14:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-04 23:14:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-09-04 23:14:23,363 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 140 [2020-09-04 23:14:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:23,364 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-09-04 23:14:23,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 23:14:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-09-04 23:14:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 23:14:23,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:23,366 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:23,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:14:23,367 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:23,367 INFO L82 PathProgramCache]: Analyzing trace with hash 435110773, now seen corresponding path program 12 times [2020-09-04 23:14:23,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:23,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454262276] [2020-09-04 23:14:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-04 23:14:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-04 23:14:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-04 23:14:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-04 23:14:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-04 23:14:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-04 23:14:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-04 23:14:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 198 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-04 23:14:23,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454262276] [2020-09-04 23:14:23,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:23,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:14:23,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157993051] [2020-09-04 23:14:23,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:14:23,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:23,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:14:23,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:14:23,574 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 13 states. [2020-09-04 23:14:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:23,713 INFO L93 Difference]: Finished difference Result 167 states and 173 transitions. [2020-09-04 23:14:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:14:23,714 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 146 [2020-09-04 23:14:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:23,716 INFO L225 Difference]: With dead ends: 167 [2020-09-04 23:14:23,716 INFO L226 Difference]: Without dead ends: 165 [2020-09-04 23:14:23,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:14:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-04 23:14:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2020-09-04 23:14:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-04 23:14:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2020-09-04 23:14:23,733 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 146 [2020-09-04 23:14:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:23,734 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2020-09-04 23:14:23,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:14:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2020-09-04 23:14:23,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 23:14:23,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:23,736 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:23,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:14:23,736 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1491064175, now seen corresponding path program 13 times [2020-09-04 23:14:23,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:23,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83056452] [2020-09-04 23:14:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-04 23:14:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-04 23:14:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-04 23:14:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-04 23:14:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-04 23:14:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-04 23:14:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-04 23:14:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-04 23:14:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-04 23:14:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 252 proven. 184 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-04 23:14:24,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83056452] [2020-09-04 23:14:24,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:24,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 23:14:24,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424726025] [2020-09-04 23:14:24,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 23:14:24,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:24,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 23:14:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:14:24,212 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 22 states. [2020-09-04 23:14:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:25,151 INFO L93 Difference]: Finished difference Result 310 states and 343 transitions. [2020-09-04 23:14:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 23:14:25,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 166 [2020-09-04 23:14:25,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:25,161 INFO L225 Difference]: With dead ends: 310 [2020-09-04 23:14:25,162 INFO L226 Difference]: Without dead ends: 241 [2020-09-04 23:14:25,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:14:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-04 23:14:25,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 166. [2020-09-04 23:14:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-04 23:14:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2020-09-04 23:14:25,198 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 166 [2020-09-04 23:14:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:25,198 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2020-09-04 23:14:25,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 23:14:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2020-09-04 23:14:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-09-04 23:14:25,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:25,203 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:25,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:14:25,204 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash -586773351, now seen corresponding path program 14 times [2020-09-04 23:14:25,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:25,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881935775] [2020-09-04 23:14:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-04 23:14:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-04 23:14:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-04 23:14:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-04 23:14:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-04 23:14:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-04 23:14:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-04 23:14:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-04 23:14:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 23:14:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 252 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-04 23:14:25,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881935775] [2020-09-04 23:14:25,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:25,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-04 23:14:25,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482066467] [2020-09-04 23:14:25,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 23:14:25,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:25,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 23:14:25,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:14:25,619 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 23 states. [2020-09-04 23:14:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:26,497 INFO L93 Difference]: Finished difference Result 324 states and 360 transitions. [2020-09-04 23:14:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 23:14:26,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 172 [2020-09-04 23:14:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:26,500 INFO L225 Difference]: With dead ends: 324 [2020-09-04 23:14:26,501 INFO L226 Difference]: Without dead ends: 255 [2020-09-04 23:14:26,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:14:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-04 23:14:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 172. [2020-09-04 23:14:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-04 23:14:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2020-09-04 23:14:26,519 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 172 [2020-09-04 23:14:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:26,520 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2020-09-04 23:14:26,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 23:14:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2020-09-04 23:14:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-04 23:14:26,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:26,522 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:26,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:14:26,523 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:26,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1481459873, now seen corresponding path program 15 times [2020-09-04 23:14:26,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:26,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874157901] [2020-09-04 23:14:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-04 23:14:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-04 23:14:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-04 23:14:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-04 23:14:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-04 23:14:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-04 23:14:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-09-04 23:14:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-04 23:14:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:14:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 308 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-04 23:14:26,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874157901] [2020-09-04 23:14:26,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:26,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:14:26,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848203648] [2020-09-04 23:14:26,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:14:26,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:14:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:14:26,790 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 15 states. [2020-09-04 23:14:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:26,959 INFO L93 Difference]: Finished difference Result 195 states and 202 transitions. [2020-09-04 23:14:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 23:14:26,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 178 [2020-09-04 23:14:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:26,963 INFO L225 Difference]: With dead ends: 195 [2020-09-04 23:14:26,963 INFO L226 Difference]: Without dead ends: 193 [2020-09-04 23:14:26,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:14:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-04 23:14:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-09-04 23:14:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-04 23:14:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2020-09-04 23:14:26,986 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 178 [2020-09-04 23:14:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:26,986 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2020-09-04 23:14:26,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:14:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2020-09-04 23:14:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-09-04 23:14:26,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:26,990 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:26,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:14:26,990 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:26,991 INFO L82 PathProgramCache]: Analyzing trace with hash 831775165, now seen corresponding path program 16 times [2020-09-04 23:14:26,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:26,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093818742] [2020-09-04 23:14:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-04 23:14:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-04 23:14:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-04 23:14:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-04 23:14:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-04 23:14:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-04 23:14:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-09-04 23:14:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-04 23:14:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:14:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-04 23:14:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-04 23:14:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 374 proven. 290 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-04 23:14:27,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093818742] [2020-09-04 23:14:27,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:27,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 23:14:27,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697402207] [2020-09-04 23:14:27,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 23:14:27,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:27,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 23:14:27,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-04 23:14:27,485 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand 26 states. [2020-09-04 23:14:28,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:28,411 INFO L93 Difference]: Finished difference Result 366 states and 406 transitions. [2020-09-04 23:14:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 23:14:28,412 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 198 [2020-09-04 23:14:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:28,414 INFO L225 Difference]: With dead ends: 366 [2020-09-04 23:14:28,414 INFO L226 Difference]: Without dead ends: 285 [2020-09-04 23:14:28,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:14:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-09-04 23:14:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 194. [2020-09-04 23:14:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-04 23:14:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 201 transitions. [2020-09-04 23:14:28,437 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 201 transitions. Word has length 198 [2020-09-04 23:14:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:28,437 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 201 transitions. [2020-09-04 23:14:28,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 23:14:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 201 transitions. [2020-09-04 23:14:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-09-04 23:14:28,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:28,441 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:28,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 23:14:28,442 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash -735042619, now seen corresponding path program 17 times [2020-09-04 23:14:28,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:28,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15954695] [2020-09-04 23:14:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-04 23:14:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-04 23:14:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-04 23:14:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-09-04 23:14:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-09-04 23:14:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2020-09-04 23:14:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-04 23:14:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-04 23:14:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-09-04 23:14:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-09-04 23:14:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-09-04 23:14:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 374 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-04 23:14:28,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15954695] [2020-09-04 23:14:28,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:28,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-04 23:14:28,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888682569] [2020-09-04 23:14:28,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 23:14:28,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 23:14:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:14:28,999 INFO L87 Difference]: Start difference. First operand 194 states and 201 transitions. Second operand 27 states. [2020-09-04 23:14:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:30,119 INFO L93 Difference]: Finished difference Result 380 states and 423 transitions. [2020-09-04 23:14:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 23:14:30,119 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 204 [2020-09-04 23:14:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:30,122 INFO L225 Difference]: With dead ends: 380 [2020-09-04 23:14:30,123 INFO L226 Difference]: Without dead ends: 299 [2020-09-04 23:14:30,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:14:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-04 23:14:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 200. [2020-09-04 23:14:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-04 23:14:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-09-04 23:14:30,144 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 204 [2020-09-04 23:14:30,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:30,145 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-09-04 23:14:30,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 23:14:30,145 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-09-04 23:14:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-04 23:14:30,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:30,147 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:30,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 23:14:30,148 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash 340049869, now seen corresponding path program 18 times [2020-09-04 23:14:30,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:30,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645949566] [2020-09-04 23:14:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-04 23:14:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-04 23:14:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-04 23:14:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-04 23:14:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-04 23:14:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-09-04 23:14:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-04 23:14:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-04 23:14:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-09-04 23:14:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-09-04 23:14:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-04 23:14:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 442 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-04 23:14:30,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645949566] [2020-09-04 23:14:30,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:30,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 23:14:30,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511120519] [2020-09-04 23:14:30,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 23:14:30,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 23:14:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:14:30,490 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 17 states. [2020-09-04 23:14:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:30,667 INFO L93 Difference]: Finished difference Result 223 states and 231 transitions. [2020-09-04 23:14:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 23:14:30,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 210 [2020-09-04 23:14:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:30,670 INFO L225 Difference]: With dead ends: 223 [2020-09-04 23:14:30,670 INFO L226 Difference]: Without dead ends: 221 [2020-09-04 23:14:30,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:14:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-04 23:14:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 216. [2020-09-04 23:14:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-04 23:14:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-09-04 23:14:30,697 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 210 [2020-09-04 23:14:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:30,698 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-09-04 23:14:30,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 23:14:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-09-04 23:14:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-04 23:14:30,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:30,702 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:30,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 23:14:30,703 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:30,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1871443223, now seen corresponding path program 19 times [2020-09-04 23:14:30,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:30,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65215136] [2020-09-04 23:14:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-04 23:14:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-04 23:14:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-04 23:14:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-04 23:14:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-04 23:14:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-09-04 23:14:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-04 23:14:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-04 23:14:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-09-04 23:14:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-09-04 23:14:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-04 23:14:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-09-04 23:14:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-09-04 23:14:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 518 proven. 420 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-09-04 23:14:31,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65215136] [2020-09-04 23:14:31,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:31,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-04 23:14:31,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825680025] [2020-09-04 23:14:31,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 23:14:31,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 23:14:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:14:31,347 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 29 states. [2020-09-04 23:14:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:32,625 INFO L93 Difference]: Finished difference Result 422 states and 469 transitions. [2020-09-04 23:14:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 23:14:32,625 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 230 [2020-09-04 23:14:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:32,628 INFO L225 Difference]: With dead ends: 422 [2020-09-04 23:14:32,628 INFO L226 Difference]: Without dead ends: 329 [2020-09-04 23:14:32,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=965, Invalid=2005, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 23:14:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-09-04 23:14:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 222. [2020-09-04 23:14:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 23:14:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 230 transitions. [2020-09-04 23:14:32,653 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 230 transitions. Word has length 230 [2020-09-04 23:14:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:32,653 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 230 transitions. [2020-09-04 23:14:32,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 23:14:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 230 transitions. [2020-09-04 23:14:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-04 23:14:32,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:32,656 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:32,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 23:14:32,657 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1346776305, now seen corresponding path program 20 times [2020-09-04 23:14:32,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:32,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605815125] [2020-09-04 23:14:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-04 23:14:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-04 23:14:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-04 23:14:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-04 23:14:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-04 23:14:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-04 23:14:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-09-04 23:14:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-09-04 23:14:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-09-04 23:14:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-09-04 23:14:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-09-04 23:14:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-09-04 23:14:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:32,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-04 23:14:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 520 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-09-04 23:14:33,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605815125] [2020-09-04 23:14:33,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:33,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 23:14:33,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892989365] [2020-09-04 23:14:33,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 23:14:33,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 23:14:33,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:14:33,030 INFO L87 Difference]: Start difference. First operand 222 states and 230 transitions. Second operand 18 states. [2020-09-04 23:14:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:33,203 INFO L93 Difference]: Finished difference Result 239 states and 247 transitions. [2020-09-04 23:14:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:14:33,204 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 236 [2020-09-04 23:14:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:33,206 INFO L225 Difference]: With dead ends: 239 [2020-09-04 23:14:33,206 INFO L226 Difference]: Without dead ends: 237 [2020-09-04 23:14:33,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:14:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-04 23:14:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 232. [2020-09-04 23:14:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-04 23:14:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-09-04 23:14:33,227 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 236 [2020-09-04 23:14:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:33,228 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-09-04 23:14:33,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 23:14:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-09-04 23:14:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-09-04 23:14:33,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:33,231 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:33,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 23:14:33,232 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash -554583489, now seen corresponding path program 21 times [2020-09-04 23:14:33,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:33,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518705809] [2020-09-04 23:14:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-04 23:14:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-04 23:14:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-04 23:14:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-04 23:14:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-04 23:14:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-04 23:14:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-09-04 23:14:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-09-04 23:14:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-09-04 23:14:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-09-04 23:14:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-09-04 23:14:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-09-04 23:14:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-04 23:14:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-04 23:14:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 602 proven. 494 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-09-04 23:14:33,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518705809] [2020-09-04 23:14:33,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:33,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 23:14:33,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119211759] [2020-09-04 23:14:33,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 23:14:33,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:33,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 23:14:33,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:14:33,961 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 32 states. [2020-09-04 23:14:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:35,427 INFO L93 Difference]: Finished difference Result 452 states and 502 transitions. [2020-09-04 23:14:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 23:14:35,435 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 246 [2020-09-04 23:14:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:35,439 INFO L225 Difference]: With dead ends: 452 [2020-09-04 23:14:35,439 INFO L226 Difference]: Without dead ends: 353 [2020-09-04 23:14:35,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 23:14:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-09-04 23:14:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 238. [2020-09-04 23:14:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-09-04 23:14:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 246 transitions. [2020-09-04 23:14:35,463 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 246 transitions. Word has length 246 [2020-09-04 23:14:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:35,464 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 246 transitions. [2020-09-04 23:14:35,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 23:14:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 246 transitions. [2020-09-04 23:14:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-09-04 23:14:35,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:35,466 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:35,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 23:14:35,466 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash -812725177, now seen corresponding path program 22 times [2020-09-04 23:14:35,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:35,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190088100] [2020-09-04 23:14:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-04 23:14:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-04 23:14:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-04 23:14:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-04 23:14:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-04 23:14:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 23:14:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-04 23:14:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-04 23:14:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-09-04 23:14:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-09-04 23:14:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-09-04 23:14:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-09-04 23:14:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-09-04 23:14:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-09-04 23:14:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 602 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-09-04 23:14:36,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190088100] [2020-09-04 23:14:36,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:36,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-04 23:14:36,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904826829] [2020-09-04 23:14:36,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 23:14:36,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:36,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 23:14:36,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:14:36,204 INFO L87 Difference]: Start difference. First operand 238 states and 246 transitions. Second operand 33 states. [2020-09-04 23:14:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:37,822 INFO L93 Difference]: Finished difference Result 466 states and 519 transitions. [2020-09-04 23:14:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 23:14:37,823 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 252 [2020-09-04 23:14:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:37,826 INFO L225 Difference]: With dead ends: 466 [2020-09-04 23:14:37,826 INFO L226 Difference]: Without dead ends: 367 [2020-09-04 23:14:37,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1263, Invalid=2643, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 23:14:37,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-09-04 23:14:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 244. [2020-09-04 23:14:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-09-04 23:14:37,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 252 transitions. [2020-09-04 23:14:37,867 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 252 transitions. Word has length 252 [2020-09-04 23:14:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:37,867 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 252 transitions. [2020-09-04 23:14:37,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 23:14:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 252 transitions. [2020-09-04 23:14:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-09-04 23:14:37,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:37,869 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:37,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 23:14:37,870 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash -305645489, now seen corresponding path program 23 times [2020-09-04 23:14:37,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:37,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261574627] [2020-09-04 23:14:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-04 23:14:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-04 23:14:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-04 23:14:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-09-04 23:14:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-04 23:14:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:14:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-04 23:14:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-04 23:14:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-04 23:14:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-04 23:14:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-04 23:14:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-09-04 23:14:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-09-04 23:14:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-09-04 23:14:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1626 backedges. 688 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-09-04 23:14:38,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261574627] [2020-09-04 23:14:38,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:38,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 23:14:38,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065931303] [2020-09-04 23:14:38,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 23:14:38,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 23:14:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:14:38,300 INFO L87 Difference]: Start difference. First operand 244 states and 252 transitions. Second operand 20 states. [2020-09-04 23:14:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:38,531 INFO L93 Difference]: Finished difference Result 267 states and 276 transitions. [2020-09-04 23:14:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 23:14:38,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 258 [2020-09-04 23:14:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:38,534 INFO L225 Difference]: With dead ends: 267 [2020-09-04 23:14:38,534 INFO L226 Difference]: Without dead ends: 265 [2020-09-04 23:14:38,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:14:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-04 23:14:38,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2020-09-04 23:14:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-04 23:14:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 269 transitions. [2020-09-04 23:14:38,560 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 269 transitions. Word has length 258 [2020-09-04 23:14:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:38,561 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 269 transitions. [2020-09-04 23:14:38,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 23:14:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 269 transitions. [2020-09-04 23:14:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-09-04 23:14:38,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:38,563 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:38,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 23:14:38,563 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:38,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1556599189, now seen corresponding path program 24 times [2020-09-04 23:14:38,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:38,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64361602] [2020-09-04 23:14:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-04 23:14:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-04 23:14:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-04 23:14:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-09-04 23:14:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-04 23:14:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:14:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-04 23:14:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-04 23:14:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-04 23:14:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-04 23:14:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-04 23:14:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-09-04 23:14:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-09-04 23:14:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-09-04 23:14:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-09-04 23:14:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-04 23:14:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 784 proven. 660 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-09-04 23:14:39,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64361602] [2020-09-04 23:14:39,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:39,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 23:14:39,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749602932] [2020-09-04 23:14:39,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 23:14:39,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:39,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 23:14:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:14:39,545 INFO L87 Difference]: Start difference. First operand 260 states and 269 transitions. Second operand 36 states. [2020-09-04 23:14:41,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:41,464 INFO L93 Difference]: Finished difference Result 508 states and 565 transitions. [2020-09-04 23:14:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-04 23:14:41,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 278 [2020-09-04 23:14:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:41,468 INFO L225 Difference]: With dead ends: 508 [2020-09-04 23:14:41,468 INFO L226 Difference]: Without dead ends: 397 [2020-09-04 23:14:41,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 23:14:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-09-04 23:14:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 266. [2020-09-04 23:14:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-04 23:14:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 275 transitions. [2020-09-04 23:14:41,500 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 275 transitions. Word has length 278 [2020-09-04 23:14:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:41,501 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 275 transitions. [2020-09-04 23:14:41,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 23:14:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 275 transitions. [2020-09-04 23:14:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-09-04 23:14:41,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:41,503 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:41,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 23:14:41,504 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:41,504 INFO L82 PathProgramCache]: Analyzing trace with hash -104128397, now seen corresponding path program 25 times [2020-09-04 23:14:41,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:41,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411601963] [2020-09-04 23:14:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-09-04 23:14:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-09-04 23:14:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2020-09-04 23:14:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-04 23:14:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-04 23:14:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-09-04 23:14:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-09-04 23:14:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-09-04 23:14:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-09-04 23:14:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-09-04 23:14:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-09-04 23:14:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-09-04 23:14:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-09-04 23:14:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-09-04 23:14:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-09-04 23:14:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:14:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 784 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-09-04 23:14:42,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411601963] [2020-09-04 23:14:42,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:42,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-04 23:14:42,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537263861] [2020-09-04 23:14:42,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 23:14:42,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:42,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 23:14:42,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:14:42,389 INFO L87 Difference]: Start difference. First operand 266 states and 275 transitions. Second operand 37 states. [2020-09-04 23:14:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:44,442 INFO L93 Difference]: Finished difference Result 522 states and 582 transitions. [2020-09-04 23:14:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-04 23:14:44,442 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 284 [2020-09-04 23:14:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:44,449 INFO L225 Difference]: With dead ends: 522 [2020-09-04 23:14:44,449 INFO L226 Difference]: Without dead ends: 411 [2020-09-04 23:14:44,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1601, Invalid=3369, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 23:14:44,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-09-04 23:14:44,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 272. [2020-09-04 23:14:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-04 23:14:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 281 transitions. [2020-09-04 23:14:44,508 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 281 transitions. Word has length 284 [2020-09-04 23:14:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:44,509 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 281 transitions. [2020-09-04 23:14:44,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 23:14:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 281 transitions. [2020-09-04 23:14:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-09-04 23:14:44,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:44,517 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:44,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 23:14:44,517 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash -435000197, now seen corresponding path program 26 times [2020-09-04 23:14:44,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:44,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527684420] [2020-09-04 23:14:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-04 23:14:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-04 23:14:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-09-04 23:14:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-04 23:14:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-04 23:14:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-09-04 23:14:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-09-04 23:14:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-04 23:14:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-09-04 23:14:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-09-04 23:14:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-09-04 23:14:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-09-04 23:14:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-09-04 23:14:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-09-04 23:14:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-09-04 23:14:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:44,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:14:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2114 backedges. 882 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-09-04 23:14:45,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527684420] [2020-09-04 23:14:45,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:45,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 23:14:45,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148706626] [2020-09-04 23:14:45,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 23:14:45,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 23:14:45,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:14:45,015 INFO L87 Difference]: Start difference. First operand 272 states and 281 transitions. Second operand 22 states. [2020-09-04 23:14:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:45,274 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-09-04 23:14:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 23:14:45,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 290 [2020-09-04 23:14:45,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:45,277 INFO L225 Difference]: With dead ends: 295 [2020-09-04 23:14:45,277 INFO L226 Difference]: Without dead ends: 293 [2020-09-04 23:14:45,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:14:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-09-04 23:14:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 288. [2020-09-04 23:14:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-09-04 23:14:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 298 transitions. [2020-09-04 23:14:45,308 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 298 transitions. Word has length 290 [2020-09-04 23:14:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:45,308 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 298 transitions. [2020-09-04 23:14:45,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 23:14:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 298 transitions. [2020-09-04 23:14:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-09-04 23:14:45,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:45,311 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:45,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 23:14:45,311 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:45,312 INFO L82 PathProgramCache]: Analyzing trace with hash -827681641, now seen corresponding path program 27 times [2020-09-04 23:14:45,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:45,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639174345] [2020-09-04 23:14:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-04 23:14:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-04 23:14:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-09-04 23:14:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-04 23:14:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-04 23:14:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-09-04 23:14:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-09-04 23:14:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-04 23:14:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-09-04 23:14:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-09-04 23:14:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-09-04 23:14:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-09-04 23:14:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-09-04 23:14:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-09-04 23:14:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-09-04 23:14:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:14:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-04 23:14:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-09-04 23:14:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 990 proven. 850 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-09-04 23:14:46,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639174345] [2020-09-04 23:14:46,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:46,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 23:14:46,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362513564] [2020-09-04 23:14:46,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 23:14:46,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 23:14:46,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:14:46,310 INFO L87 Difference]: Start difference. First operand 288 states and 298 transitions. Second operand 40 states. [2020-09-04 23:14:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:48,563 INFO L93 Difference]: Finished difference Result 564 states and 628 transitions. [2020-09-04 23:14:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-04 23:14:48,564 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 310 [2020-09-04 23:14:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:48,568 INFO L225 Difference]: With dead ends: 564 [2020-09-04 23:14:48,568 INFO L226 Difference]: Without dead ends: 441 [2020-09-04 23:14:48,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 23:14:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-09-04 23:14:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 294. [2020-09-04 23:14:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-09-04 23:14:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 304 transitions. [2020-09-04 23:14:48,604 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 304 transitions. Word has length 310 [2020-09-04 23:14:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:48,604 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 304 transitions. [2020-09-04 23:14:48,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 23:14:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 304 transitions. [2020-09-04 23:14:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-09-04 23:14:48,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:48,607 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:48,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 23:14:48,608 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1001612959, now seen corresponding path program 28 times [2020-09-04 23:14:48,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:48,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672219406] [2020-09-04 23:14:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-04 23:14:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-04 23:14:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-04 23:14:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-09-04 23:14:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-09-04 23:14:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-09-04 23:14:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-09-04 23:14:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-09-04 23:14:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-09-04 23:14:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-04 23:14:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-04 23:14:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-09-04 23:14:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-09-04 23:14:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-09-04 23:14:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-09-04 23:14:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:14:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:14:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:14:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 990 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-09-04 23:14:49,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672219406] [2020-09-04 23:14:49,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:49,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-04 23:14:49,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521565491] [2020-09-04 23:14:49,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 23:14:49,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 23:14:49,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:14:49,688 INFO L87 Difference]: Start difference. First operand 294 states and 304 transitions. Second operand 41 states. [2020-09-04 23:14:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:52,160 INFO L93 Difference]: Finished difference Result 578 states and 645 transitions. [2020-09-04 23:14:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-04 23:14:52,160 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 316 [2020-09-04 23:14:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:52,163 INFO L225 Difference]: With dead ends: 578 [2020-09-04 23:14:52,163 INFO L226 Difference]: Without dead ends: 455 [2020-09-04 23:14:52,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1979, Invalid=4183, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 23:14:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-09-04 23:14:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 300. [2020-09-04 23:14:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-09-04 23:14:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 310 transitions. [2020-09-04 23:14:52,204 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 310 transitions. Word has length 316 [2020-09-04 23:14:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:52,204 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 310 transitions. [2020-09-04 23:14:52,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 23:14:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 310 transitions. [2020-09-04 23:14:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-09-04 23:14:52,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:52,207 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:52,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 23:14:52,208 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1183355559, now seen corresponding path program 29 times [2020-09-04 23:14:52,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:52,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477937017] [2020-09-04 23:14:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-04 23:14:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-04 23:14:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 23:14:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-04 23:14:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-04 23:14:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-09-04 23:14:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-09-04 23:14:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-09-04 23:14:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-09-04 23:14:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-09-04 23:14:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-09-04 23:14:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-09-04 23:14:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-04 23:14:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-04 23:14:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-04 23:14:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:14:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:14:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:14:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2666 backedges. 1100 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-09-04 23:14:52,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477937017] [2020-09-04 23:14:52,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:52,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 23:14:52,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502824454] [2020-09-04 23:14:52,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 23:14:52,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:52,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 23:14:52,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:14:52,823 INFO L87 Difference]: Start difference. First operand 300 states and 310 transitions. Second operand 24 states. [2020-09-04 23:14:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:53,092 INFO L93 Difference]: Finished difference Result 323 states and 334 transitions. [2020-09-04 23:14:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 23:14:53,093 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 322 [2020-09-04 23:14:53,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:53,095 INFO L225 Difference]: With dead ends: 323 [2020-09-04 23:14:53,095 INFO L226 Difference]: Without dead ends: 321 [2020-09-04 23:14:53,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-09-04 23:14:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-09-04 23:14:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-09-04 23:14:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-09-04 23:14:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 327 transitions. [2020-09-04 23:14:53,126 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 327 transitions. Word has length 322 [2020-09-04 23:14:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:53,127 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 327 transitions. [2020-09-04 23:14:53,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 23:14:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 327 transitions. [2020-09-04 23:14:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-09-04 23:14:53,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:53,130 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:53,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 23:14:53,130 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:53,131 INFO L82 PathProgramCache]: Analyzing trace with hash 920382659, now seen corresponding path program 30 times [2020-09-04 23:14:53,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:53,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867954899] [2020-09-04 23:14:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-04 23:14:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-04 23:14:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 23:14:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-04 23:14:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-04 23:14:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-09-04 23:14:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-09-04 23:14:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-09-04 23:14:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-09-04 23:14:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-09-04 23:14:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-09-04 23:14:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-09-04 23:14:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-04 23:14:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-04 23:14:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-04 23:14:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:14:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:14:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:14:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:14:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:14:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 1220 proven. 1064 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-09-04 23:14:54,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867954899] [2020-09-04 23:14:54,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:54,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 23:14:54,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744887088] [2020-09-04 23:14:54,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 23:14:54,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:54,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 23:14:54,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:14:54,446 INFO L87 Difference]: Start difference. First operand 316 states and 327 transitions. Second operand 44 states. [2020-09-04 23:14:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:57,129 INFO L93 Difference]: Finished difference Result 620 states and 691 transitions. [2020-09-04 23:14:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-09-04 23:14:57,132 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 342 [2020-09-04 23:14:57,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:57,141 INFO L225 Difference]: With dead ends: 620 [2020-09-04 23:14:57,142 INFO L226 Difference]: Without dead ends: 485 [2020-09-04 23:14:57,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 23:14:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-09-04 23:14:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 322. [2020-09-04 23:14:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-09-04 23:14:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 333 transitions. [2020-09-04 23:14:57,195 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 333 transitions. Word has length 342 [2020-09-04 23:14:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:57,196 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 333 transitions. [2020-09-04 23:14:57,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 23:14:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 333 transitions. [2020-09-04 23:14:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-09-04 23:14:57,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:57,199 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:57,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 23:14:57,200 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:57,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1792712395, now seen corresponding path program 31 times [2020-09-04 23:14:57,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:57,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254947914] [2020-09-04 23:14:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-09-04 23:14:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-04 23:14:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:14:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-04 23:14:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-04 23:14:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-04 23:14:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-04 23:14:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-04 23:14:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-09-04 23:14:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-09-04 23:14:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-09-04 23:14:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-09-04 23:14:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-04 23:14:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-09-04 23:14:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-09-04 23:14:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:14:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:14:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:14:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:14:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:14:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 1220 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-09-04 23:14:58,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254947914] [2020-09-04 23:14:58,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:58,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-04 23:14:58,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574824159] [2020-09-04 23:14:58,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-04 23:14:58,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-04 23:14:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:14:58,539 INFO L87 Difference]: Start difference. First operand 322 states and 333 transitions. Second operand 45 states. [2020-09-04 23:15:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:01,390 INFO L93 Difference]: Finished difference Result 634 states and 708 transitions. [2020-09-04 23:15:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-04 23:15:01,390 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 348 [2020-09-04 23:15:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:01,393 INFO L225 Difference]: With dead ends: 634 [2020-09-04 23:15:01,393 INFO L226 Difference]: Without dead ends: 499 [2020-09-04 23:15:01,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2397, Invalid=5085, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 23:15:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-09-04 23:15:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 328. [2020-09-04 23:15:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-09-04 23:15:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 339 transitions. [2020-09-04 23:15:01,433 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 339 transitions. Word has length 348 [2020-09-04 23:15:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:01,433 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 339 transitions. [2020-09-04 23:15:01,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-04 23:15:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 339 transitions. [2020-09-04 23:15:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-09-04 23:15:01,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:01,436 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:01,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 23:15:01,436 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:01,437 INFO L82 PathProgramCache]: Analyzing trace with hash -457332013, now seen corresponding path program 32 times [2020-09-04 23:15:01,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:01,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526294998] [2020-09-04 23:15:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-04 23:15:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-04 23:15:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-09-04 23:15:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-09-04 23:15:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-09-04 23:15:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-09-04 23:15:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-09-04 23:15:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-09-04 23:15:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-09-04 23:15:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-09-04 23:15:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-09-04 23:15:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-09-04 23:15:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:15:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-09-04 23:15:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:15:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:15:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:15:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:15:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:15:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:15:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 1342 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-09-04 23:15:02,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526294998] [2020-09-04 23:15:02,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:02,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 23:15:02,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624174902] [2020-09-04 23:15:02,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 23:15:02,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 23:15:02,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-09-04 23:15:02,100 INFO L87 Difference]: Start difference. First operand 328 states and 339 transitions. Second operand 26 states. [2020-09-04 23:15:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:02,420 INFO L93 Difference]: Finished difference Result 351 states and 363 transitions. [2020-09-04 23:15:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 23:15:02,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 354 [2020-09-04 23:15:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:02,424 INFO L225 Difference]: With dead ends: 351 [2020-09-04 23:15:02,424 INFO L226 Difference]: Without dead ends: 349 [2020-09-04 23:15:02,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:15:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-04 23:15:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 344. [2020-09-04 23:15:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-09-04 23:15:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 356 transitions. [2020-09-04 23:15:02,460 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 356 transitions. Word has length 354 [2020-09-04 23:15:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:02,460 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 356 transitions. [2020-09-04 23:15:02,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 23:15:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 356 transitions. [2020-09-04 23:15:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-09-04 23:15:02,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:02,464 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:02,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 23:15:02,464 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash 702494447, now seen corresponding path program 33 times [2020-09-04 23:15:02,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:02,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426640629] [2020-09-04 23:15:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-04 23:15:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-04 23:15:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-09-04 23:15:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-09-04 23:15:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-09-04 23:15:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-09-04 23:15:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-09-04 23:15:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-09-04 23:15:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-09-04 23:15:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-09-04 23:15:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-09-04 23:15:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-09-04 23:15:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:15:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-09-04 23:15:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:15:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:15:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:15:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:15:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:15:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:15:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:15:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:15:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1474 proven. 1302 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-09-04 23:15:03,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426640629] [2020-09-04 23:15:03,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:03,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 23:15:03,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628181589] [2020-09-04 23:15:03,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 23:15:03,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:03,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 23:15:03,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:15:03,957 INFO L87 Difference]: Start difference. First operand 344 states and 356 transitions. Second operand 48 states. [2020-09-04 23:15:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:07,337 INFO L93 Difference]: Finished difference Result 676 states and 754 transitions. [2020-09-04 23:15:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-09-04 23:15:07,338 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 374 [2020-09-04 23:15:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:07,340 INFO L225 Difference]: With dead ends: 676 [2020-09-04 23:15:07,340 INFO L226 Difference]: Without dead ends: 529 [2020-09-04 23:15:07,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 23:15:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-09-04 23:15:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 350. [2020-09-04 23:15:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-09-04 23:15:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 362 transitions. [2020-09-04 23:15:07,385 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 362 transitions. Word has length 374 [2020-09-04 23:15:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:07,385 INFO L479 AbstractCegarLoop]: Abstraction has 350 states and 362 transitions. [2020-09-04 23:15:07,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 23:15:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 362 transitions. [2020-09-04 23:15:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-09-04 23:15:07,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:07,388 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:07,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 23:15:07,389 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:07,390 INFO L82 PathProgramCache]: Analyzing trace with hash -715929353, now seen corresponding path program 34 times [2020-09-04 23:15:07,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:07,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90914414] [2020-09-04 23:15:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-04 23:15:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-04 23:15:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-09-04 23:15:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-09-04 23:15:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-04 23:15:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-09-04 23:15:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-09-04 23:15:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-09-04 23:15:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-09-04 23:15:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-09-04 23:15:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-09-04 23:15:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-09-04 23:15:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:15:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-04 23:15:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-09-04 23:15:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:15:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:15:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:15:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:15:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:15:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:15:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:15:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 1474 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-09-04 23:15:08,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90914414] [2020-09-04 23:15:08,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:08,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-04 23:15:08,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483261631] [2020-09-04 23:15:08,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-04 23:15:08,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-04 23:15:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 23:15:08,952 INFO L87 Difference]: Start difference. First operand 350 states and 362 transitions. Second operand 49 states. [2020-09-04 23:15:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:12,467 INFO L93 Difference]: Finished difference Result 690 states and 771 transitions. [2020-09-04 23:15:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-09-04 23:15:12,467 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 380 [2020-09-04 23:15:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:12,469 INFO L225 Difference]: With dead ends: 690 [2020-09-04 23:15:12,469 INFO L226 Difference]: Without dead ends: 543 [2020-09-04 23:15:12,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2855, Invalid=6075, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 23:15:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-09-04 23:15:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 356. [2020-09-04 23:15:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-09-04 23:15:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 368 transitions. [2020-09-04 23:15:12,513 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 368 transitions. Word has length 380 [2020-09-04 23:15:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:12,514 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 368 transitions. [2020-09-04 23:15:12,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-04 23:15:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 368 transitions. [2020-09-04 23:15:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-09-04 23:15:12,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:12,517 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:12,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 23:15:12,518 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash 247772415, now seen corresponding path program 35 times [2020-09-04 23:15:12,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:12,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386243651] [2020-09-04 23:15:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-09-04 23:15:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-09-04 23:15:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-09-04 23:15:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-09-04 23:15:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-09-04 23:15:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-09-04 23:15:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-04 23:15:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-04 23:15:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-09-04 23:15:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-09-04 23:15:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-09-04 23:15:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-09-04 23:15:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:15:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:15:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:15:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:15:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:15:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:15:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:15:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:15:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:15:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:15:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3962 backedges. 1608 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-09-04 23:15:13,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386243651] [2020-09-04 23:15:13,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:13,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 23:15:13,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530999960] [2020-09-04 23:15:13,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 23:15:13,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:13,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 23:15:13,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:15:13,327 INFO L87 Difference]: Start difference. First operand 356 states and 368 transitions. Second operand 28 states. [2020-09-04 23:15:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:13,664 INFO L93 Difference]: Finished difference Result 379 states and 392 transitions. [2020-09-04 23:15:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 23:15:13,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 386 [2020-09-04 23:15:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:13,668 INFO L225 Difference]: With dead ends: 379 [2020-09-04 23:15:13,668 INFO L226 Difference]: Without dead ends: 377 [2020-09-04 23:15:13,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:15:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-09-04 23:15:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 372. [2020-09-04 23:15:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-09-04 23:15:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 385 transitions. [2020-09-04 23:15:13,710 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 385 transitions. Word has length 386 [2020-09-04 23:15:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:13,711 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 385 transitions. [2020-09-04 23:15:13,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 23:15:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 385 transitions. [2020-09-04 23:15:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-09-04 23:15:13,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:13,714 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:13,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 23:15:13,715 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 776434459, now seen corresponding path program 36 times [2020-09-04 23:15:13,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:13,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805633995] [2020-09-04 23:15:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-09-04 23:15:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-09-04 23:15:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-09-04 23:15:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-09-04 23:15:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-09-04 23:15:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-09-04 23:15:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-04 23:15:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-04 23:15:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-09-04 23:15:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-09-04 23:15:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-09-04 23:15:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-09-04 23:15:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:15:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:15:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:15:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:15:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:15:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:15:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:15:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:15:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:15:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:15:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-09-04 23:15:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-09-04 23:15:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4420 backedges. 1752 proven. 1564 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-09-04 23:15:15,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805633995] [2020-09-04 23:15:15,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:15,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-04 23:15:15,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13544761] [2020-09-04 23:15:15,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 23:15:15,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 23:15:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:15:15,535 INFO L87 Difference]: Start difference. First operand 372 states and 385 transitions. Second operand 52 states. [2020-09-04 23:15:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:19,099 INFO L93 Difference]: Finished difference Result 732 states and 817 transitions. [2020-09-04 23:15:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-09-04 23:15:19,100 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 406 [2020-09-04 23:15:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:19,103 INFO L225 Difference]: With dead ends: 732 [2020-09-04 23:15:19,103 INFO L226 Difference]: Without dead ends: 573 [2020-09-04 23:15:19,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-09-04 23:15:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-09-04 23:15:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 378. [2020-09-04 23:15:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-09-04 23:15:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 391 transitions. [2020-09-04 23:15:19,150 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 391 transitions. Word has length 406 [2020-09-04 23:15:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:19,151 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 391 transitions. [2020-09-04 23:15:19,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 23:15:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 391 transitions. [2020-09-04 23:15:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-09-04 23:15:19,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:19,154 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:19,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 23:15:19,154 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:19,155 INFO L82 PathProgramCache]: Analyzing trace with hash 28435747, now seen corresponding path program 37 times [2020-09-04 23:15:19,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:19,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564711827] [2020-09-04 23:15:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-04 23:15:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-04 23:15:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-09-04 23:15:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-09-04 23:15:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-09-04 23:15:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-09-04 23:15:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-09-04 23:15:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-09-04 23:15:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-09-04 23:15:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-04 23:15:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-04 23:15:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-04 23:15:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:15:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:15:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:15:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:15:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:15:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:15:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:15:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:15:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:15:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:15:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:15:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:15:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 1752 proven. 1704 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-09-04 23:15:21,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564711827] [2020-09-04 23:15:21,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:21,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-04 23:15:21,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825791035] [2020-09-04 23:15:21,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-04 23:15:21,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-04 23:15:21,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:15:21,041 INFO L87 Difference]: Start difference. First operand 378 states and 391 transitions. Second operand 53 states. [2020-09-04 23:15:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:25,261 INFO L93 Difference]: Finished difference Result 746 states and 834 transitions. [2020-09-04 23:15:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-09-04 23:15:25,261 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 412 [2020-09-04 23:15:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:25,263 INFO L225 Difference]: With dead ends: 746 [2020-09-04 23:15:25,264 INFO L226 Difference]: Without dead ends: 587 [2020-09-04 23:15:25,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3353, Invalid=7153, Unknown=0, NotChecked=0, Total=10506 [2020-09-04 23:15:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-09-04 23:15:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 384. [2020-09-04 23:15:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-09-04 23:15:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 397 transitions. [2020-09-04 23:15:25,311 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 397 transitions. Word has length 412 [2020-09-04 23:15:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:25,312 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 397 transitions. [2020-09-04 23:15:25,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-04 23:15:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 397 transitions. [2020-09-04 23:15:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-04 23:15:25,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:25,315 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:25,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 23:15:25,315 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:25,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1261482283, now seen corresponding path program 38 times [2020-09-04 23:15:25,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:25,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556314993] [2020-09-04 23:15:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-04 23:15:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-04 23:15:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-04 23:15:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-04 23:15:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-04 23:15:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-09-04 23:15:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-09-04 23:15:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-09-04 23:15:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-09-04 23:15:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-04 23:15:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-09-04 23:15:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-09-04 23:15:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:15:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:15:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:15:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:15:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:15:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:15:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:15:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:15:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:15:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:15:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:15:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:15:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4706 backedges. 1898 proven. 1704 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-09-04 23:15:26,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556314993] [2020-09-04 23:15:26,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:26,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 23:15:26,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716549873] [2020-09-04 23:15:26,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 23:15:26,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:26,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 23:15:26,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-09-04 23:15:26,211 INFO L87 Difference]: Start difference. First operand 384 states and 397 transitions. Second operand 30 states. [2020-09-04 23:15:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:26,595 INFO L93 Difference]: Finished difference Result 407 states and 421 transitions. [2020-09-04 23:15:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 23:15:26,596 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 418 [2020-09-04 23:15:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:26,599 INFO L225 Difference]: With dead ends: 407 [2020-09-04 23:15:26,599 INFO L226 Difference]: Without dead ends: 405 [2020-09-04 23:15:26,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:15:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-09-04 23:15:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 400. [2020-09-04 23:15:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-09-04 23:15:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 414 transitions. [2020-09-04 23:15:26,646 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 414 transitions. Word has length 418 [2020-09-04 23:15:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:26,646 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 414 transitions. [2020-09-04 23:15:26,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 23:15:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 414 transitions. [2020-09-04 23:15:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-09-04 23:15:26,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:26,650 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:26,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 23:15:26,651 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1020812985, now seen corresponding path program 39 times [2020-09-04 23:15:26,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:26,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145707460] [2020-09-04 23:15:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-04 23:15:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-04 23:15:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-04 23:15:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-04 23:15:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-04 23:15:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-09-04 23:15:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-09-04 23:15:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-09-04 23:15:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-09-04 23:15:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-04 23:15:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-09-04 23:15:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-09-04 23:15:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:15:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:15:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:15:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:15:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:15:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:15:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:15:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:15:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:15:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:15:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:15:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:15:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-09-04 23:15:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-09-04 23:15:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5204 backedges. 2054 proven. 1850 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-09-04 23:15:28,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145707460] [2020-09-04 23:15:28,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:28,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-09-04 23:15:28,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095764375] [2020-09-04 23:15:28,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 23:15:28,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 23:15:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 23:15:28,744 INFO L87 Difference]: Start difference. First operand 400 states and 414 transitions. Second operand 56 states. [2020-09-04 23:15:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:33,288 INFO L93 Difference]: Finished difference Result 788 states and 880 transitions. [2020-09-04 23:15:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-09-04 23:15:33,289 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 438 [2020-09-04 23:15:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:33,292 INFO L225 Difference]: With dead ends: 788 [2020-09-04 23:15:33,292 INFO L226 Difference]: Without dead ends: 617 [2020-09-04 23:15:33,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-09-04 23:15:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-09-04 23:15:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 406. [2020-09-04 23:15:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-09-04 23:15:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 420 transitions. [2020-09-04 23:15:33,328 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 420 transitions. Word has length 438 [2020-09-04 23:15:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:33,329 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 420 transitions. [2020-09-04 23:15:33,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 23:15:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 420 transitions. [2020-09-04 23:15:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-09-04 23:15:33,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:33,332 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:33,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 23:15:33,332 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:33,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1862792015, now seen corresponding path program 40 times [2020-09-04 23:15:33,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:33,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657203841] [2020-09-04 23:15:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-09-04 23:15:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-09-04 23:15:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-09-04 23:15:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-09-04 23:15:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-09-04 23:15:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-09-04 23:15:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-09-04 23:15:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-09-04 23:15:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-09-04 23:15:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:15:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-09-04 23:15:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:15:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:15:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:15:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:15:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:15:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:15:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:15:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:15:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-09-04 23:15:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-04 23:15:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:15:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-09-04 23:15:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-09-04 23:15:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-09-04 23:15:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-09-04 23:15:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 2054 proven. 2002 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-09-04 23:15:35,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657203841] [2020-09-04 23:15:35,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:35,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-09-04 23:15:35,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008668523] [2020-09-04 23:15:35,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-04 23:15:35,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:35,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-04 23:15:35,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 23:15:35,572 INFO L87 Difference]: Start difference. First operand 406 states and 420 transitions. Second operand 57 states. [2020-09-04 23:15:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:40,542 INFO L93 Difference]: Finished difference Result 802 states and 897 transitions. [2020-09-04 23:15:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-09-04 23:15:40,542 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 444 [2020-09-04 23:15:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:40,545 INFO L225 Difference]: With dead ends: 802 [2020-09-04 23:15:40,546 INFO L226 Difference]: Without dead ends: 631 [2020-09-04 23:15:40,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3891, Invalid=8319, Unknown=0, NotChecked=0, Total=12210 [2020-09-04 23:15:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-09-04 23:15:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 412. [2020-09-04 23:15:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-09-04 23:15:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 426 transitions. [2020-09-04 23:15:40,590 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 426 transitions. Word has length 444 [2020-09-04 23:15:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:40,591 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 426 transitions. [2020-09-04 23:15:40,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-04 23:15:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 426 transitions. [2020-09-04 23:15:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-04 23:15:40,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:40,595 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:40,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 23:15:40,595 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash 420781911, now seen corresponding path program 41 times [2020-09-04 23:15:40,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:40,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340132294] [2020-09-04 23:15:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-09-04 23:15:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-04 23:15:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-09-04 23:15:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-09-04 23:15:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-09-04 23:15:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-09-04 23:15:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-09-04 23:15:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-09-04 23:15:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-09-04 23:15:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:15:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-04 23:15:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-09-04 23:15:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:15:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:15:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:15:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:15:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:15:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:15:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:15:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-09-04 23:15:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:15:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-09-04 23:15:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-09-04 23:15:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-09-04 23:15:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-09-04 23:15:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-09-04 23:15:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 2212 proven. 2002 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-09-04 23:15:41,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340132294] [2020-09-04 23:15:41,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:41,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 23:15:41,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241437602] [2020-09-04 23:15:41,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 23:15:41,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:41,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 23:15:41,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:15:41,732 INFO L87 Difference]: Start difference. First operand 412 states and 426 transitions. Second operand 32 states. [2020-09-04 23:15:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:42,168 INFO L93 Difference]: Finished difference Result 435 states and 450 transitions. [2020-09-04 23:15:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 23:15:42,169 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 450 [2020-09-04 23:15:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:42,173 INFO L225 Difference]: With dead ends: 435 [2020-09-04 23:15:42,173 INFO L226 Difference]: Without dead ends: 433 [2020-09-04 23:15:42,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:15:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-09-04 23:15:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 428. [2020-09-04 23:15:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-09-04 23:15:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 443 transitions. [2020-09-04 23:15:42,224 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 443 transitions. Word has length 450 [2020-09-04 23:15:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:42,224 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 443 transitions. [2020-09-04 23:15:42,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 23:15:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 443 transitions. [2020-09-04 23:15:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-09-04 23:15:42,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:42,228 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:42,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 23:15:42,229 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:42,229 INFO L82 PathProgramCache]: Analyzing trace with hash 538100083, now seen corresponding path program 42 times [2020-09-04 23:15:42,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:42,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758520101] [2020-09-04 23:15:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-09-04 23:15:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-04 23:15:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-09-04 23:15:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-09-04 23:15:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-09-04 23:15:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-09-04 23:15:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-09-04 23:15:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-09-04 23:15:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-09-04 23:15:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:15:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-04 23:15:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-09-04 23:15:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:15:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:15:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:15:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:15:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:15:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:15:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:15:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-09-04 23:15:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:15:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-09-04 23:15:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-09-04 23:15:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-09-04 23:15:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-09-04 23:15:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-09-04 23:15:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-09-04 23:15:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-09-04 23:15:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6052 backedges. 2380 proven. 2160 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-09-04 23:15:44,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758520101] [2020-09-04 23:15:44,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:44,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-09-04 23:15:44,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567634781] [2020-09-04 23:15:44,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-09-04 23:15:44,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-09-04 23:15:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 23:15:44,717 INFO L87 Difference]: Start difference. First operand 428 states and 443 transitions. Second operand 60 states. [2020-09-04 23:15:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:50,201 INFO L93 Difference]: Finished difference Result 844 states and 943 transitions. [2020-09-04 23:15:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-09-04 23:15:50,202 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 470 [2020-09-04 23:15:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:50,205 INFO L225 Difference]: With dead ends: 844 [2020-09-04 23:15:50,205 INFO L226 Difference]: Without dead ends: 661 [2020-09-04 23:15:50,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-09-04 23:15:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-09-04 23:15:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 434. [2020-09-04 23:15:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-09-04 23:15:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 449 transitions. [2020-09-04 23:15:50,260 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 449 transitions. Word has length 470 [2020-09-04 23:15:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:50,261 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 449 transitions. [2020-09-04 23:15:50,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-09-04 23:15:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 449 transitions. [2020-09-04 23:15:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-04 23:15:50,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:50,266 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:50,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 23:15:50,266 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1424552827, now seen corresponding path program 43 times [2020-09-04 23:15:50,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:50,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436370483] [2020-09-04 23:15:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-09-04 23:15:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-09-04 23:15:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-09-04 23:15:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-04 23:15:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-04 23:15:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-09-04 23:15:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-09-04 23:15:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-09-04 23:15:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-09-04 23:15:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:15:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:15:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:15:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:15:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:15:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:15:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:15:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:15:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:15:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:15:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-09-04 23:15:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-09-04 23:15:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-09-04 23:15:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-09-04 23:15:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-09-04 23:15:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-09-04 23:15:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-09-04 23:15:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-09-04 23:15:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-04 23:15:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 2380 proven. 2324 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-09-04 23:15:52,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436370483] [2020-09-04 23:15:52,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:52,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-09-04 23:15:52,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416454340] [2020-09-04 23:15:52,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-09-04 23:15:52,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-09-04 23:15:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 23:15:52,907 INFO L87 Difference]: Start difference. First operand 434 states and 449 transitions. Second operand 61 states. [2020-09-04 23:15:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:58,750 INFO L93 Difference]: Finished difference Result 858 states and 960 transitions. [2020-09-04 23:15:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-04 23:15:58,750 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 476 [2020-09-04 23:15:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:58,753 INFO L225 Difference]: With dead ends: 858 [2020-09-04 23:15:58,753 INFO L226 Difference]: Without dead ends: 675 [2020-09-04 23:15:58,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4469, Invalid=9573, Unknown=0, NotChecked=0, Total=14042 [2020-09-04 23:15:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-09-04 23:15:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 440. [2020-09-04 23:15:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-09-04 23:15:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 455 transitions. [2020-09-04 23:15:58,841 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 455 transitions. Word has length 476 [2020-09-04 23:15:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:58,842 INFO L479 AbstractCegarLoop]: Abstraction has 440 states and 455 transitions. [2020-09-04 23:15:58,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-09-04 23:15:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 455 transitions. [2020-09-04 23:15:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-09-04 23:15:58,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:58,846 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:58,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 23:15:58,846 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1341948029, now seen corresponding path program 44 times [2020-09-04 23:15:58,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:58,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966431331] [2020-09-04 23:15:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-09-04 23:15:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-09-04 23:15:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-09-04 23:15:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-09-04 23:15:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-09-04 23:15:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-09-04 23:15:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-04 23:15:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-04 23:15:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-04 23:15:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:15:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:15:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:15:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:15:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:15:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:15:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:15:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:15:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:15:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:15:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:15:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:15:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-09-04 23:15:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-04 23:15:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:15:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-09-04 23:15:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:15:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:15:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-09-04 23:15:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6386 backedges. 2550 proven. 2324 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-09-04 23:16:00,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966431331] [2020-09-04 23:16:00,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:00,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 23:16:00,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829125059] [2020-09-04 23:16:00,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 23:16:00,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 23:16:00,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 23:16:00,029 INFO L87 Difference]: Start difference. First operand 440 states and 455 transitions. Second operand 34 states. [2020-09-04 23:16:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:00,530 INFO L93 Difference]: Finished difference Result 463 states and 479 transitions. [2020-09-04 23:16:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 23:16:00,531 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 482 [2020-09-04 23:16:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:00,533 INFO L225 Difference]: With dead ends: 463 [2020-09-04 23:16:00,533 INFO L226 Difference]: Without dead ends: 461 [2020-09-04 23:16:00,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:16:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-09-04 23:16:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 456. [2020-09-04 23:16:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-09-04 23:16:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 472 transitions. [2020-09-04 23:16:00,574 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 472 transitions. Word has length 482 [2020-09-04 23:16:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:00,575 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 472 transitions. [2020-09-04 23:16:00,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 23:16:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 472 transitions. [2020-09-04 23:16:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-09-04 23:16:00,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:00,579 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:00,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 23:16:00,579 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash -182725729, now seen corresponding path program 45 times [2020-09-04 23:16:00,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:00,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139967197] [2020-09-04 23:16:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-09-04 23:16:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-09-04 23:16:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-09-04 23:16:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-09-04 23:16:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-09-04 23:16:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-09-04 23:16:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-04 23:16:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-04 23:16:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-04 23:16:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:16:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:16:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:16:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:16:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:16:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:16:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:16:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:16:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:16:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:16:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:16:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:16:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-09-04 23:16:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-04 23:16:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:16:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-09-04 23:16:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:16:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:16:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-09-04 23:16:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-09-04 23:16:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-09-04 23:16:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6964 backedges. 2730 proven. 2494 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-09-04 23:16:03,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139967197] [2020-09-04 23:16:03,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:03,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-09-04 23:16:03,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846292719] [2020-09-04 23:16:03,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 23:16:03,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:03,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 23:16:03,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 23:16:03,498 INFO L87 Difference]: Start difference. First operand 456 states and 472 transitions. Second operand 64 states. [2020-09-04 23:16:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:09,932 INFO L93 Difference]: Finished difference Result 900 states and 1006 transitions. [2020-09-04 23:16:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-04 23:16:09,933 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 502 [2020-09-04 23:16:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:09,936 INFO L225 Difference]: With dead ends: 900 [2020-09-04 23:16:09,936 INFO L226 Difference]: Without dead ends: 705 [2020-09-04 23:16:09,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-09-04 23:16:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-09-04 23:16:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 462. [2020-09-04 23:16:09,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-09-04 23:16:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 478 transitions. [2020-09-04 23:16:09,992 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 478 transitions. Word has length 502 [2020-09-04 23:16:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:09,993 INFO L479 AbstractCegarLoop]: Abstraction has 462 states and 478 transitions. [2020-09-04 23:16:09,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 23:16:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 478 transitions. [2020-09-04 23:16:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-09-04 23:16:09,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:09,997 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:09,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 23:16:09,997 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:09,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1667753383, now seen corresponding path program 46 times [2020-09-04 23:16:09,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:09,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065143857] [2020-09-04 23:16:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-04 23:16:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-04 23:16:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-09-04 23:16:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-09-04 23:16:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-09-04 23:16:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-09-04 23:16:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-04 23:16:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-09-04 23:16:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-09-04 23:16:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:16:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:16:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:16:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:16:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:16:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:16:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:16:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:16:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:16:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:16:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:16:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:16:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-09-04 23:16:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-09-04 23:16:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-09-04 23:16:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:16:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-09-04 23:16:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-09-04 23:16:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-09-04 23:16:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-09-04 23:16:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-09-04 23:16:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 2730 proven. 2670 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-09-04 23:16:12,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065143857] [2020-09-04 23:16:12,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:12,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-09-04 23:16:12,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618962090] [2020-09-04 23:16:12,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-09-04 23:16:12,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-09-04 23:16:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 23:16:12,967 INFO L87 Difference]: Start difference. First operand 462 states and 478 transitions. Second operand 65 states. [2020-09-04 23:16:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:19,178 INFO L93 Difference]: Finished difference Result 914 states and 1023 transitions. [2020-09-04 23:16:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-09-04 23:16:19,178 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 508 [2020-09-04 23:16:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:19,181 INFO L225 Difference]: With dead ends: 914 [2020-09-04 23:16:19,181 INFO L226 Difference]: Without dead ends: 719 [2020-09-04 23:16:19,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5087, Invalid=10915, Unknown=0, NotChecked=0, Total=16002 [2020-09-04 23:16:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2020-09-04 23:16:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 468. [2020-09-04 23:16:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-09-04 23:16:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 484 transitions. [2020-09-04 23:16:19,289 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 484 transitions. Word has length 508 [2020-09-04 23:16:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:19,289 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 484 transitions. [2020-09-04 23:16:19,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-09-04 23:16:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 484 transitions. [2020-09-04 23:16:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-09-04 23:16:19,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:19,294 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:19,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 23:16:19,295 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:19,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1072672337, now seen corresponding path program 47 times [2020-09-04 23:16:19,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:19,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775917998] [2020-09-04 23:16:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-09-04 23:16:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-09-04 23:16:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-09-04 23:16:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-09-04 23:16:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-09-04 23:16:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-09-04 23:16:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:16:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-09-04 23:16:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:16:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:16:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:16:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:16:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:16:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:16:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:16:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:16:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-09-04 23:16:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-04 23:16:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:16:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-09-04 23:16:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-09-04 23:16:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-09-04 23:16:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-09-04 23:16:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-09-04 23:16:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-09-04 23:16:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-09-04 23:16:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-09-04 23:16:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-09-04 23:16:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-09-04 23:16:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-09-04 23:16:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7322 backedges. 2912 proven. 2670 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-09-04 23:16:20,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775917998] [2020-09-04 23:16:20,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:20,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 23:16:20,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428743309] [2020-09-04 23:16:20,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 23:16:20,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:20,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 23:16:20,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:16:20,736 INFO L87 Difference]: Start difference. First operand 468 states and 484 transitions. Second operand 36 states. [2020-09-04 23:16:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:21,432 INFO L93 Difference]: Finished difference Result 491 states and 508 transitions. [2020-09-04 23:16:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 23:16:21,433 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 514 [2020-09-04 23:16:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:21,437 INFO L225 Difference]: With dead ends: 491 [2020-09-04 23:16:21,437 INFO L226 Difference]: Without dead ends: 489 [2020-09-04 23:16:21,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:16:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-09-04 23:16:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 484. [2020-09-04 23:16:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-09-04 23:16:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 501 transitions. [2020-09-04 23:16:21,483 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 501 transitions. Word has length 514 [2020-09-04 23:16:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:21,484 INFO L479 AbstractCegarLoop]: Abstraction has 484 states and 501 transitions. [2020-09-04 23:16:21,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 23:16:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 501 transitions. [2020-09-04 23:16:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-09-04 23:16:21,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:21,487 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:21,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 23:16:21,487 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 718657483, now seen corresponding path program 48 times [2020-09-04 23:16:21,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:21,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269004744] [2020-09-04 23:16:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-09-04 23:16:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-09-04 23:16:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-09-04 23:16:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-09-04 23:16:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-09-04 23:16:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-09-04 23:16:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:16:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-09-04 23:16:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:16:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:16:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:16:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:16:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:16:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:16:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:16:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:16:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-09-04 23:16:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-04 23:16:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:16:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-09-04 23:16:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-09-04 23:16:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-09-04 23:16:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-09-04 23:16:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-09-04 23:16:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-09-04 23:16:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-09-04 23:16:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-09-04 23:16:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-09-04 23:16:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-09-04 23:16:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-09-04 23:16:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-09-04 23:16:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-09-04 23:16:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7940 backedges. 3104 proven. 2852 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-09-04 23:16:24,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269004744] [2020-09-04 23:16:24,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:24,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-09-04 23:16:24,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664459387] [2020-09-04 23:16:24,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-09-04 23:16:24,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:24,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-09-04 23:16:24,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 23:16:24,907 INFO L87 Difference]: Start difference. First operand 484 states and 501 transitions. Second operand 68 states. [2020-09-04 23:16:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:31,748 INFO L93 Difference]: Finished difference Result 956 states and 1069 transitions. [2020-09-04 23:16:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-09-04 23:16:31,749 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 534 [2020-09-04 23:16:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:31,753 INFO L225 Difference]: With dead ends: 956 [2020-09-04 23:16:31,753 INFO L226 Difference]: Without dead ends: 749 [2020-09-04 23:16:31,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-09-04 23:16:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-09-04 23:16:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 490. [2020-09-04 23:16:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-09-04 23:16:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 507 transitions. [2020-09-04 23:16:31,826 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 507 transitions. Word has length 534 [2020-09-04 23:16:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:31,827 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 507 transitions. [2020-09-04 23:16:31,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-09-04 23:16:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 507 transitions. [2020-09-04 23:16:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2020-09-04 23:16:31,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:31,830 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:31,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-04 23:16:31,831 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:31,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:31,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2095593005, now seen corresponding path program 49 times [2020-09-04 23:16:31,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:31,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375181573] [2020-09-04 23:16:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-09-04 23:16:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-09-04 23:16:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-09-04 23:16:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-09-04 23:16:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-09-04 23:16:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-09-04 23:16:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:16:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-04 23:16:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-09-04 23:16:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:16:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:16:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:16:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:16:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:16:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:16:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:16:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-09-04 23:16:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:16:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-09-04 23:16:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-09-04 23:16:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-09-04 23:16:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-09-04 23:16:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-09-04 23:16:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-09-04 23:16:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-09-04 23:16:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-09-04 23:16:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-09-04 23:16:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-09-04 23:16:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-09-04 23:16:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-09-04 23:16:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-09-04 23:16:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-09-04 23:16:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 3104 proven. 3040 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-09-04 23:16:35,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375181573] [2020-09-04 23:16:35,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:35,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-09-04 23:16:35,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669818159] [2020-09-04 23:16:35,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-09-04 23:16:35,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-09-04 23:16:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=3501, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 23:16:35,584 INFO L87 Difference]: Start difference. First operand 490 states and 507 transitions. Second operand 69 states. [2020-09-04 23:16:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:42,941 INFO L93 Difference]: Finished difference Result 970 states and 1086 transitions. [2020-09-04 23:16:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-09-04 23:16:42,941 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 540 [2020-09-04 23:16:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:42,944 INFO L225 Difference]: With dead ends: 970 [2020-09-04 23:16:42,944 INFO L226 Difference]: Without dead ends: 763 [2020-09-04 23:16:42,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5745, Invalid=12345, Unknown=0, NotChecked=0, Total=18090 [2020-09-04 23:16:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-09-04 23:16:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 496. [2020-09-04 23:16:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-09-04 23:16:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 513 transitions. [2020-09-04 23:16:43,002 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 513 transitions. Word has length 540 [2020-09-04 23:16:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:43,003 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 513 transitions. [2020-09-04 23:16:43,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-09-04 23:16:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 513 transitions. [2020-09-04 23:16:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2020-09-04 23:16:43,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:43,006 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:43,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-04 23:16:43,006 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash 835589595, now seen corresponding path program 50 times [2020-09-04 23:16:43,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:43,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350565274] [2020-09-04 23:16:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-04 23:16:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-04 23:16:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-09-04 23:16:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-09-04 23:16:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-09-04 23:16:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-09-04 23:16:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:16:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:16:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:16:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:16:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:16:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:16:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:16:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:16:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:16:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:16:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-09-04 23:16:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-09-04 23:16:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-09-04 23:16:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-09-04 23:16:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-09-04 23:16:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-09-04 23:16:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-09-04 23:16:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-09-04 23:16:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-04 23:16:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-09-04 23:16:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-09-04 23:16:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-09-04 23:16:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-09-04 23:16:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-09-04 23:16:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-09-04 23:16:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-09-04 23:16:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8322 backedges. 3298 proven. 3040 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-09-04 23:16:44,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350565274] [2020-09-04 23:16:44,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:44,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 23:16:44,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324652053] [2020-09-04 23:16:44,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 23:16:44,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 23:16:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 23:16:44,617 INFO L87 Difference]: Start difference. First operand 496 states and 513 transitions. Second operand 38 states. [2020-09-04 23:16:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:45,309 INFO L93 Difference]: Finished difference Result 519 states and 537 transitions. [2020-09-04 23:16:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-04 23:16:45,310 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 546 [2020-09-04 23:16:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:45,313 INFO L225 Difference]: With dead ends: 519 [2020-09-04 23:16:45,313 INFO L226 Difference]: Without dead ends: 517 [2020-09-04 23:16:45,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:16:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-09-04 23:16:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 512. [2020-09-04 23:16:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-09-04 23:16:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 530 transitions. [2020-09-04 23:16:45,382 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 530 transitions. Word has length 546 [2020-09-04 23:16:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:45,382 INFO L479 AbstractCegarLoop]: Abstraction has 512 states and 530 transitions. [2020-09-04 23:16:45,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 23:16:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 530 transitions. [2020-09-04 23:16:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2020-09-04 23:16:45,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:45,385 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:45,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-04 23:16:45,386 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1571566089, now seen corresponding path program 51 times [2020-09-04 23:16:45,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:45,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532195187] [2020-09-04 23:16:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-04 23:16:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-04 23:16:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-09-04 23:16:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-09-04 23:16:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-09-04 23:16:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-09-04 23:16:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:16:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:16:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:16:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:16:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:16:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:16:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:16:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:16:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:16:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:16:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-09-04 23:16:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-09-04 23:16:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-09-04 23:16:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-09-04 23:16:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-09-04 23:16:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-09-04 23:16:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-09-04 23:16:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-09-04 23:16:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-04 23:16:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-09-04 23:16:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-09-04 23:16:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-09-04 23:16:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-09-04 23:16:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-09-04 23:16:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-09-04 23:16:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-09-04 23:16:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-09-04 23:16:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-09-04 23:16:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8980 backedges. 3502 proven. 3234 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-09-04 23:16:49,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532195187] [2020-09-04 23:16:49,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:49,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-09-04 23:16:49,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625085012] [2020-09-04 23:16:49,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-09-04 23:16:49,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:49,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-09-04 23:16:49,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 23:16:49,378 INFO L87 Difference]: Start difference. First operand 512 states and 530 transitions. Second operand 72 states. [2020-09-04 23:16:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:59,130 INFO L93 Difference]: Finished difference Result 1012 states and 1132 transitions. [2020-09-04 23:16:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-09-04 23:16:59,131 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 566 [2020-09-04 23:16:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:59,135 INFO L225 Difference]: With dead ends: 1012 [2020-09-04 23:16:59,135 INFO L226 Difference]: Without dead ends: 793 [2020-09-04 23:16:59,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-09-04 23:16:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-09-04 23:16:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 518. [2020-09-04 23:16:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-09-04 23:16:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 536 transitions. [2020-09-04 23:16:59,190 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 536 transitions. Word has length 566 [2020-09-04 23:16:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:59,190 INFO L479 AbstractCegarLoop]: Abstraction has 518 states and 536 transitions. [2020-09-04 23:16:59,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-09-04 23:16:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 536 transitions. [2020-09-04 23:16:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-09-04 23:16:59,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:59,196 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:59,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-04 23:16:59,196 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1794400257, now seen corresponding path program 52 times [2020-09-04 23:16:59,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:59,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644615092] [2020-09-04 23:16:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-09-04 23:17:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-09-04 23:17:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-09-04 23:17:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-04 23:17:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-04 23:17:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-04 23:17:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:17:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:17:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:17:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:17:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:17:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:17:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:17:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:17:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:17:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:17:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:17:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:17:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-09-04 23:17:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-04 23:17:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:17:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-09-04 23:17:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:17:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:17:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-09-04 23:17:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-09-04 23:17:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-09-04 23:17:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-09-04 23:17:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-09-04 23:17:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-09-04 23:17:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-09-04 23:17:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-09-04 23:17:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-09-04 23:17:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-09-04 23:17:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 3502 proven. 3434 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-09-04 23:17:03,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644615092] [2020-09-04 23:17:03,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:03,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-09-04 23:17:03,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733913363] [2020-09-04 23:17:03,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-09-04 23:17:03,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:03,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-09-04 23:17:03,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3923, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 23:17:03,526 INFO L87 Difference]: Start difference. First operand 518 states and 536 transitions. Second operand 73 states. [2020-09-04 23:17:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:11,997 INFO L93 Difference]: Finished difference Result 1026 states and 1149 transitions. [2020-09-04 23:17:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-09-04 23:17:11,997 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 572 [2020-09-04 23:17:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:12,001 INFO L225 Difference]: With dead ends: 1026 [2020-09-04 23:17:12,001 INFO L226 Difference]: Without dead ends: 807 [2020-09-04 23:17:12,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=6443, Invalid=13863, Unknown=0, NotChecked=0, Total=20306 [2020-09-04 23:17:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2020-09-04 23:17:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 524. [2020-09-04 23:17:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-09-04 23:17:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 542 transitions. [2020-09-04 23:17:12,056 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 542 transitions. Word has length 572 [2020-09-04 23:17:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:12,056 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 542 transitions. [2020-09-04 23:17:12,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-09-04 23:17:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 542 transitions. [2020-09-04 23:17:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-09-04 23:17:12,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:12,061 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:12,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-04 23:17:12,061 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash -430978041, now seen corresponding path program 53 times [2020-09-04 23:17:12,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:12,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805226720] [2020-09-04 23:17:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-09-04 23:17:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-09-04 23:17:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-09-04 23:17:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-04 23:17:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-09-04 23:17:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-09-04 23:17:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:17:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:17:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:17:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:17:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:17:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:17:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:17:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:17:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:17:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:17:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:17:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:17:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-09-04 23:17:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-09-04 23:17:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-09-04 23:17:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:17:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-09-04 23:17:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-09-04 23:17:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-09-04 23:17:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-09-04 23:17:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-09-04 23:17:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-09-04 23:17:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-09-04 23:17:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-09-04 23:17:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-09-04 23:17:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-09-04 23:17:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-09-04 23:17:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-09-04 23:17:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9386 backedges. 3708 proven. 3434 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-09-04 23:17:14,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805226720] [2020-09-04 23:17:14,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:14,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 23:17:14,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35945318] [2020-09-04 23:17:14,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 23:17:14,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:14,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 23:17:14,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:17:14,034 INFO L87 Difference]: Start difference. First operand 524 states and 542 transitions. Second operand 40 states. [2020-09-04 23:17:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:14,860 INFO L93 Difference]: Finished difference Result 547 states and 566 transitions. [2020-09-04 23:17:14,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 23:17:14,861 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 578 [2020-09-04 23:17:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:14,864 INFO L225 Difference]: With dead ends: 547 [2020-09-04 23:17:14,864 INFO L226 Difference]: Without dead ends: 545 [2020-09-04 23:17:14,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:17:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-09-04 23:17:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 540. [2020-09-04 23:17:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-09-04 23:17:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 559 transitions. [2020-09-04 23:17:14,918 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 559 transitions. Word has length 578 [2020-09-04 23:17:14,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:14,919 INFO L479 AbstractCegarLoop]: Abstraction has 540 states and 559 transitions. [2020-09-04 23:17:14,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 23:17:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 559 transitions. [2020-09-04 23:17:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2020-09-04 23:17:14,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:14,922 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:14,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-09-04 23:17:14,923 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash -181881309, now seen corresponding path program 54 times [2020-09-04 23:17:14,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:14,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993036160] [2020-09-04 23:17:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-09-04 23:17:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-09-04 23:17:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-09-04 23:17:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-04 23:17:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-09-04 23:17:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-09-04 23:17:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:17:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:17:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:17:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:17:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:17:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:17:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:17:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:17:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:17:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:17:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:17:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:17:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-09-04 23:17:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-09-04 23:17:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-09-04 23:17:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:17:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-09-04 23:17:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-09-04 23:17:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-09-04 23:17:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-09-04 23:17:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-09-04 23:17:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-09-04 23:17:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-09-04 23:17:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-09-04 23:17:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-09-04 23:17:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-09-04 23:17:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-09-04 23:17:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-09-04 23:17:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-09-04 23:17:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-09-04 23:17:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10084 backedges. 3924 proven. 3640 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-09-04 23:17:19,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993036160] [2020-09-04 23:17:19,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:19,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-09-04 23:17:19,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741539449] [2020-09-04 23:17:19,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-09-04 23:17:19,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:19,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-09-04 23:17:19,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 23:17:19,653 INFO L87 Difference]: Start difference. First operand 540 states and 559 transitions. Second operand 76 states. [2020-09-04 23:17:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:29,446 INFO L93 Difference]: Finished difference Result 1068 states and 1195 transitions. [2020-09-04 23:17:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-09-04 23:17:29,447 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 598 [2020-09-04 23:17:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:29,451 INFO L225 Difference]: With dead ends: 1068 [2020-09-04 23:17:29,451 INFO L226 Difference]: Without dead ends: 837 [2020-09-04 23:17:29,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-09-04 23:17:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-09-04 23:17:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 546. [2020-09-04 23:17:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-09-04 23:17:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 565 transitions. [2020-09-04 23:17:29,510 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 565 transitions. Word has length 598 [2020-09-04 23:17:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:29,511 INFO L479 AbstractCegarLoop]: Abstraction has 546 states and 565 transitions. [2020-09-04 23:17:29,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-09-04 23:17:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 565 transitions. [2020-09-04 23:17:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2020-09-04 23:17:29,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:29,514 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:29,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-09-04 23:17:29,515 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:29,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:29,515 INFO L82 PathProgramCache]: Analyzing trace with hash 852912171, now seen corresponding path program 55 times [2020-09-04 23:17:29,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:29,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101763248] [2020-09-04 23:17:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-09-04 23:17:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-09-04 23:17:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-09-04 23:17:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:17:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-09-04 23:17:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:17:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:17:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:17:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:17:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:17:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:17:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:17:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:17:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-09-04 23:17:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-04 23:17:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:17:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-09-04 23:17:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-09-04 23:17:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-09-04 23:17:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-09-04 23:17:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-09-04 23:17:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-09-04 23:17:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-09-04 23:17:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-09-04 23:17:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-09-04 23:17:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-09-04 23:17:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-09-04 23:17:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-09-04 23:17:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-09-04 23:17:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-09-04 23:17:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-09-04 23:17:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-09-04 23:17:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-09-04 23:17:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-09-04 23:17:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-09-04 23:17:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-09-04 23:17:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 3924 proven. 3852 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-09-04 23:17:34,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101763248] [2020-09-04 23:17:34,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:34,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-09-04 23:17:34,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018341418] [2020-09-04 23:17:34,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-09-04 23:17:34,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:34,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-09-04 23:17:34,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 23:17:34,696 INFO L87 Difference]: Start difference. First operand 546 states and 565 transitions. Second operand 77 states. [2020-09-04 23:17:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:45,670 INFO L93 Difference]: Finished difference Result 1082 states and 1212 transitions. [2020-09-04 23:17:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-09-04 23:17:45,670 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 604 [2020-09-04 23:17:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:45,675 INFO L225 Difference]: With dead ends: 1082 [2020-09-04 23:17:45,675 INFO L226 Difference]: Without dead ends: 851 [2020-09-04 23:17:45,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=7181, Invalid=15469, Unknown=0, NotChecked=0, Total=22650 [2020-09-04 23:17:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-09-04 23:17:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 552. [2020-09-04 23:17:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-09-04 23:17:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 571 transitions. [2020-09-04 23:17:45,742 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 571 transitions. Word has length 604 [2020-09-04 23:17:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:45,743 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 571 transitions. [2020-09-04 23:17:45,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-09-04 23:17:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 571 transitions. [2020-09-04 23:17:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2020-09-04 23:17:45,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:45,749 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:45,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-09-04 23:17:45,749 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:45,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1999139891, now seen corresponding path program 56 times [2020-09-04 23:17:45,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:45,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746555381] [2020-09-04 23:17:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-09-04 23:17:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-09-04 23:17:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-09-04 23:17:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:17:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-04 23:17:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-09-04 23:17:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:17:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:17:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:17:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:17:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:17:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:17:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:17:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-09-04 23:17:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:17:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-09-04 23:17:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-09-04 23:17:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-09-04 23:17:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-09-04 23:17:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-09-04 23:17:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-09-04 23:17:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-09-04 23:17:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-09-04 23:17:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-09-04 23:17:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-09-04 23:17:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-09-04 23:17:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-09-04 23:17:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-09-04 23:17:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-09-04 23:17:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-09-04 23:17:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-09-04 23:17:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-09-04 23:17:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-09-04 23:17:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-09-04 23:17:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-09-04 23:17:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-09-04 23:17:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10514 backedges. 4142 proven. 3852 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-09-04 23:17:48,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746555381] [2020-09-04 23:17:48,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:48,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 23:17:48,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752472421] [2020-09-04 23:17:48,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 23:17:48,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:48,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 23:17:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 23:17:48,049 INFO L87 Difference]: Start difference. First operand 552 states and 571 transitions. Second operand 42 states. [2020-09-04 23:17:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:49,060 INFO L93 Difference]: Finished difference Result 575 states and 595 transitions. [2020-09-04 23:17:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 23:17:49,062 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 610 [2020-09-04 23:17:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:49,065 INFO L225 Difference]: With dead ends: 575 [2020-09-04 23:17:49,065 INFO L226 Difference]: Without dead ends: 573 [2020-09-04 23:17:49,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:17:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-09-04 23:17:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2020-09-04 23:17:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-09-04 23:17:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 588 transitions. [2020-09-04 23:17:49,126 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 588 transitions. Word has length 610 [2020-09-04 23:17:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:49,126 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 588 transitions. [2020-09-04 23:17:49,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 23:17:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 588 transitions. [2020-09-04 23:17:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2020-09-04 23:17:49,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:49,130 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:49,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-04 23:17:49,131 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash 895979599, now seen corresponding path program 57 times [2020-09-04 23:17:49,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:49,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501560700] [2020-09-04 23:17:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-09-04 23:17:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-09-04 23:17:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-09-04 23:17:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:17:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-04 23:17:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-09-04 23:17:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:17:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:17:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:17:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:17:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:17:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:17:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:17:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-09-04 23:17:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:17:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-09-04 23:17:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-09-04 23:17:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-09-04 23:17:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-09-04 23:17:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-09-04 23:17:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-09-04 23:17:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-09-04 23:17:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-09-04 23:17:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-09-04 23:17:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-09-04 23:17:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-09-04 23:17:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-09-04 23:17:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-09-04 23:17:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-09-04 23:17:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-09-04 23:17:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-09-04 23:17:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-09-04 23:17:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-09-04 23:17:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-09-04 23:17:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-09-04 23:17:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-09-04 23:17:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2020-09-04 23:17:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2020-09-04 23:17:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11252 backedges. 4370 proven. 4070 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-09-04 23:17:55,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501560700] [2020-09-04 23:17:55,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:55,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-09-04 23:17:55,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330365123] [2020-09-04 23:17:55,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-09-04 23:17:55,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:55,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-09-04 23:17:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 23:17:55,122 INFO L87 Difference]: Start difference. First operand 568 states and 588 transitions. Second operand 80 states. [2020-09-04 23:18:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:07,346 INFO L93 Difference]: Finished difference Result 1124 states and 1258 transitions. [2020-09-04 23:18:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-09-04 23:18:07,348 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 630 [2020-09-04 23:18:07,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:07,352 INFO L225 Difference]: With dead ends: 1124 [2020-09-04 23:18:07,353 INFO L226 Difference]: Without dead ends: 881 [2020-09-04 23:18:07,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-09-04 23:18:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-09-04 23:18:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 574. [2020-09-04 23:18:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-09-04 23:18:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 594 transitions. [2020-09-04 23:18:07,418 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 594 transitions. Word has length 630 [2020-09-04 23:18:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:07,418 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 594 transitions. [2020-09-04 23:18:07,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-09-04 23:18:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 594 transitions. [2020-09-04 23:18:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2020-09-04 23:18:07,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:07,423 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:07,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-09-04 23:18:07,423 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1854612055, now seen corresponding path program 58 times [2020-09-04 23:18:07,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:07,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393906421] [2020-09-04 23:18:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-09-04 23:18:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-09-04 23:18:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-09-04 23:18:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:18:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:18:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:18:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:18:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:18:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:18:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:18:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:18:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:18:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:18:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-09-04 23:18:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-09-04 23:18:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-09-04 23:18:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-09-04 23:18:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-09-04 23:18:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-09-04 23:18:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-09-04 23:18:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-09-04 23:18:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-04 23:18:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-09-04 23:18:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-09-04 23:18:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-09-04 23:18:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-09-04 23:18:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-09-04 23:18:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-09-04 23:18:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-09-04 23:18:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-09-04 23:18:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-09-04 23:18:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2020-09-04 23:18:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2020-09-04 23:18:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 582 [2020-09-04 23:18:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2020-09-04 23:18:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2020-09-04 23:18:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2020-09-04 23:18:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-09-04 23:18:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 4370 proven. 4294 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-09-04 23:18:13,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393906421] [2020-09-04 23:18:13,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:13,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-09-04 23:18:13,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428634452] [2020-09-04 23:18:13,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-09-04 23:18:13,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:13,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-09-04 23:18:13,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=4839, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 23:18:13,708 INFO L87 Difference]: Start difference. First operand 574 states and 594 transitions. Second operand 81 states. [2020-09-04 23:18:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:27,266 INFO L93 Difference]: Finished difference Result 1138 states and 1275 transitions. [2020-09-04 23:18:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-09-04 23:18:27,266 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 636 [2020-09-04 23:18:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:27,271 INFO L225 Difference]: With dead ends: 1138 [2020-09-04 23:18:27,271 INFO L226 Difference]: Without dead ends: 895 [2020-09-04 23:18:27,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=7959, Invalid=17163, Unknown=0, NotChecked=0, Total=25122 [2020-09-04 23:18:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-09-04 23:18:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 580. [2020-09-04 23:18:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-09-04 23:18:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 600 transitions. [2020-09-04 23:18:27,345 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 600 transitions. Word has length 636 [2020-09-04 23:18:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:27,346 INFO L479 AbstractCegarLoop]: Abstraction has 580 states and 600 transitions. [2020-09-04 23:18:27,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-09-04 23:18:27,346 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 600 transitions. [2020-09-04 23:18:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-09-04 23:18:27,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:27,351 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:27,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-09-04 23:18:27,351 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:27,352 INFO L82 PathProgramCache]: Analyzing trace with hash -160756129, now seen corresponding path program 59 times [2020-09-04 23:18:27,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:27,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400355694] [2020-09-04 23:18:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-04 23:18:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-04 23:18:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-04 23:18:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:18:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:18:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:18:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:18:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:18:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:18:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:18:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:18:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:18:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:18:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:18:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:18:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-09-04 23:18:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-04 23:18:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:18:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-09-04 23:18:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:18:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:18:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-09-04 23:18:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-09-04 23:18:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-09-04 23:18:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-09-04 23:18:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-09-04 23:18:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-09-04 23:18:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-09-04 23:18:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-09-04 23:18:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-09-04 23:18:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-09-04 23:18:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-09-04 23:18:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-09-04 23:18:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-09-04 23:18:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-09-04 23:18:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-09-04 23:18:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-09-04 23:18:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:29,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-09-04 23:18:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11706 backedges. 4600 proven. 4294 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-09-04 23:18:30,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400355694] [2020-09-04 23:18:30,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:30,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 23:18:30,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112569036] [2020-09-04 23:18:30,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 23:18:30,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 23:18:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:18:30,047 INFO L87 Difference]: Start difference. First operand 580 states and 600 transitions. Second operand 44 states. [2020-09-04 23:18:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:31,144 INFO L93 Difference]: Finished difference Result 603 states and 624 transitions. [2020-09-04 23:18:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-04 23:18:31,146 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 642 [2020-09-04 23:18:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:31,149 INFO L225 Difference]: With dead ends: 603 [2020-09-04 23:18:31,150 INFO L226 Difference]: Without dead ends: 601 [2020-09-04 23:18:31,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:18:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-09-04 23:18:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 596. [2020-09-04 23:18:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-09-04 23:18:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 617 transitions. [2020-09-04 23:18:31,215 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 617 transitions. Word has length 642 [2020-09-04 23:18:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:31,215 INFO L479 AbstractCegarLoop]: Abstraction has 596 states and 617 transitions. [2020-09-04 23:18:31,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 23:18:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 617 transitions. [2020-09-04 23:18:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2020-09-04 23:18:31,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:31,220 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:31,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-09-04 23:18:31,220 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1381802885, now seen corresponding path program 60 times [2020-09-04 23:18:31,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:31,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061982470] [2020-09-04 23:18:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-04 23:18:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-04 23:18:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-04 23:18:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:18:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:18:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:18:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:18:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:18:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:18:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:18:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:18:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:18:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:18:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:18:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:18:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-09-04 23:18:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-04 23:18:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:18:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-09-04 23:18:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:18:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:18:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-09-04 23:18:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-09-04 23:18:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-09-04 23:18:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-09-04 23:18:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-09-04 23:18:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-09-04 23:18:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-09-04 23:18:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-09-04 23:18:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-09-04 23:18:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-09-04 23:18:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-09-04 23:18:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-09-04 23:18:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-09-04 23:18:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-09-04 23:18:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-09-04 23:18:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-09-04 23:18:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-09-04 23:18:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 638 [2020-09-04 23:18:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-09-04 23:18:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12484 backedges. 4840 proven. 4524 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-09-04 23:18:38,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061982470] [2020-09-04 23:18:38,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:38,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-09-04 23:18:38,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032504722] [2020-09-04 23:18:38,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-09-04 23:18:38,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-09-04 23:18:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 23:18:38,563 INFO L87 Difference]: Start difference. First operand 596 states and 617 transitions. Second operand 84 states. [2020-09-04 23:18:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:52,744 INFO L93 Difference]: Finished difference Result 1180 states and 1321 transitions. [2020-09-04 23:18:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-09-04 23:18:52,746 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 662 [2020-09-04 23:18:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:52,751 INFO L225 Difference]: With dead ends: 1180 [2020-09-04 23:18:52,751 INFO L226 Difference]: Without dead ends: 925 [2020-09-04 23:18:52,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-09-04 23:18:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-09-04 23:18:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 602. [2020-09-04 23:18:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-09-04 23:18:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 623 transitions. [2020-09-04 23:18:52,826 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 623 transitions. Word has length 662 [2020-09-04 23:18:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:52,826 INFO L479 AbstractCegarLoop]: Abstraction has 602 states and 623 transitions. [2020-09-04 23:18:52,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-09-04 23:18:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 623 transitions. [2020-09-04 23:18:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2020-09-04 23:18:52,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:52,831 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:52,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-09-04 23:18:52,831 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:52,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1833120125, now seen corresponding path program 61 times [2020-09-04 23:18:52,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:52,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800556952] [2020-09-04 23:18:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-04 23:19:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-09-04 23:19:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-09-04 23:19:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:19:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:19:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:19:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:19:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:19:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:19:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:19:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:19:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:19:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:19:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:19:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:19:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-09-04 23:19:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-09-04 23:19:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-09-04 23:19:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:19:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-09-04 23:19:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-09-04 23:19:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-09-04 23:19:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-09-04 23:19:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-09-04 23:19:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-09-04 23:19:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-09-04 23:19:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-09-04 23:19:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-09-04 23:19:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-09-04 23:19:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-09-04 23:19:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-09-04 23:19:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-09-04 23:19:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-09-04 23:19:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 594 [2020-09-04 23:19:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2020-09-04 23:19:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2020-09-04 23:19:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 624 [2020-09-04 23:19:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2020-09-04 23:19:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2020-09-04 23:19:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 654 [2020-09-04 23:19:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 4840 proven. 4760 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-09-04 23:19:00,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800556952] [2020-09-04 23:19:00,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:00,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-09-04 23:19:00,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186616038] [2020-09-04 23:19:00,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-09-04 23:19:00,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-09-04 23:19:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5333, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 23:19:00,847 INFO L87 Difference]: Start difference. First operand 602 states and 623 transitions. Second operand 85 states. [2020-09-04 23:19:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:16,815 INFO L93 Difference]: Finished difference Result 1194 states and 1338 transitions. [2020-09-04 23:19:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-09-04 23:19:16,816 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 668 [2020-09-04 23:19:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:16,821 INFO L225 Difference]: With dead ends: 1194 [2020-09-04 23:19:16,821 INFO L226 Difference]: Without dead ends: 939 [2020-09-04 23:19:16,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=8777, Invalid=18945, Unknown=0, NotChecked=0, Total=27722 [2020-09-04 23:19:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2020-09-04 23:19:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 608. [2020-09-04 23:19:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-09-04 23:19:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 629 transitions. [2020-09-04 23:19:16,901 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 629 transitions. Word has length 668 [2020-09-04 23:19:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:16,902 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 629 transitions. [2020-09-04 23:19:16,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-09-04 23:19:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 629 transitions. [2020-09-04 23:19:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-09-04 23:19:16,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:16,908 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:16,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-09-04 23:19:16,908 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:16,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1364551029, now seen corresponding path program 62 times [2020-09-04 23:19:16,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:16,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332734029] [2020-09-04 23:19:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:19:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-09-04 23:19:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:19:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:19:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:19:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:19:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:19:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:19:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:19:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:19:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-09-04 23:19:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-04 23:19:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:19:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-09-04 23:19:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-09-04 23:19:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-09-04 23:19:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-09-04 23:19:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-09-04 23:19:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-09-04 23:19:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-09-04 23:19:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-09-04 23:19:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-09-04 23:19:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-09-04 23:19:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-09-04 23:19:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-09-04 23:19:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-09-04 23:19:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-09-04 23:19:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-09-04 23:19:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-09-04 23:19:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-09-04 23:19:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-09-04 23:19:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-09-04 23:19:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-09-04 23:19:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 600 [2020-09-04 23:19:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 610 [2020-09-04 23:19:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 620 [2020-09-04 23:19:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2020-09-04 23:19:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-09-04 23:19:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 650 [2020-09-04 23:19:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-09-04 23:19:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12962 backedges. 5082 proven. 4760 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-09-04 23:19:20,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332734029] [2020-09-04 23:19:20,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:20,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 23:19:20,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108756695] [2020-09-04 23:19:20,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 23:19:20,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:20,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 23:19:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 23:19:20,391 INFO L87 Difference]: Start difference. First operand 608 states and 629 transitions. Second operand 46 states. [2020-09-04 23:19:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:21,869 INFO L93 Difference]: Finished difference Result 631 states and 653 transitions. [2020-09-04 23:19:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 23:19:21,871 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 674 [2020-09-04 23:19:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:21,877 INFO L225 Difference]: With dead ends: 631 [2020-09-04 23:19:21,877 INFO L226 Difference]: Without dead ends: 629 [2020-09-04 23:19:21,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 23:19:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-09-04 23:19:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 624. [2020-09-04 23:19:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-09-04 23:19:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 646 transitions. [2020-09-04 23:19:21,974 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 646 transitions. Word has length 674 [2020-09-04 23:19:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:21,975 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 646 transitions. [2020-09-04 23:19:21,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 23:19:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 646 transitions. [2020-09-04 23:19:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2020-09-04 23:19:21,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:21,980 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:21,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-09-04 23:19:21,981 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1594942809, now seen corresponding path program 63 times [2020-09-04 23:19:21,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:21,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398678814] [2020-09-04 23:19:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-09-04 23:19:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-09-04 23:19:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:19:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:19:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:19:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:19:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:19:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:19:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:19:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:19:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-09-04 23:19:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-04 23:19:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:19:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-09-04 23:19:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-09-04 23:19:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-09-04 23:19:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-09-04 23:19:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-09-04 23:19:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-09-04 23:19:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-09-04 23:19:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-09-04 23:19:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-09-04 23:19:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-09-04 23:19:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-09-04 23:19:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-09-04 23:19:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-09-04 23:19:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-09-04 23:19:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-09-04 23:19:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-09-04 23:19:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-09-04 23:19:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-09-04 23:19:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-09-04 23:19:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-09-04 23:19:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 600 [2020-09-04 23:19:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 610 [2020-09-04 23:19:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 620 [2020-09-04 23:19:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2020-09-04 23:19:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-09-04 23:19:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 650 [2020-09-04 23:19:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-09-04 23:19:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2020-09-04 23:19:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 680 [2020-09-04 23:19:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13780 backedges. 5334 proven. 5002 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-09-04 23:19:31,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398678814] [2020-09-04 23:19:31,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:31,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-09-04 23:19:31,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261130971] [2020-09-04 23:19:31,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-09-04 23:19:31,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-09-04 23:19:31,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 23:19:31,388 INFO L87 Difference]: Start difference. First operand 624 states and 646 transitions. Second operand 88 states. [2020-09-04 23:19:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:50,598 INFO L93 Difference]: Finished difference Result 1236 states and 1384 transitions. [2020-09-04 23:19:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-09-04 23:19:50,601 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 694 [2020-09-04 23:19:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:50,607 INFO L225 Difference]: With dead ends: 1236 [2020-09-04 23:19:50,607 INFO L226 Difference]: Without dead ends: 969 [2020-09-04 23:19:50,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-09-04 23:19:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-09-04 23:19:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 630. [2020-09-04 23:19:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-09-04 23:19:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 652 transitions. [2020-09-04 23:19:50,744 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 652 transitions. Word has length 694 [2020-09-04 23:19:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:50,744 INFO L479 AbstractCegarLoop]: Abstraction has 630 states and 652 transitions. [2020-09-04 23:19:50,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-09-04 23:19:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 652 transitions. [2020-09-04 23:19:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2020-09-04 23:19:50,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:50,750 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:50,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-09-04 23:19:50,750 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:50,750 INFO L82 PathProgramCache]: Analyzing trace with hash -495031121, now seen corresponding path program 64 times [2020-09-04 23:19:50,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:50,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721052911] [2020-09-04 23:19:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-09-04 23:20:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-04 23:20:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-09-04 23:20:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:20:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:20:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:20:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:20:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:20:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:20:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:20:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-09-04 23:20:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:20:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-09-04 23:20:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-09-04 23:20:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-09-04 23:20:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-09-04 23:20:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-09-04 23:20:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-09-04 23:20:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-09-04 23:20:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-09-04 23:20:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-09-04 23:20:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-09-04 23:20:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-09-04 23:20:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-09-04 23:20:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-09-04 23:20:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-09-04 23:20:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-09-04 23:20:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-09-04 23:20:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-09-04 23:20:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-09-04 23:20:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-09-04 23:20:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-09-04 23:20:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-09-04 23:20:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2020-09-04 23:20:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2020-09-04 23:20:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 626 [2020-09-04 23:20:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 636 [2020-09-04 23:20:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 646 [2020-09-04 23:20:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 656 [2020-09-04 23:20:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 666 [2020-09-04 23:20:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 676 [2020-09-04 23:20:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-09-04 23:20:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 5334 proven. 5250 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-09-04 23:20:00,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721052911] [2020-09-04 23:20:00,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:00,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-09-04 23:20:00,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994042093] [2020-09-04 23:20:00,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-09-04 23:20:00,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-09-04 23:20:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1981, Invalid=5851, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 23:20:00,911 INFO L87 Difference]: Start difference. First operand 630 states and 652 transitions. Second operand 89 states. [2020-09-04 23:20:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:22,449 INFO L93 Difference]: Finished difference Result 1250 states and 1401 transitions. [2020-09-04 23:20:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-04 23:20:22,449 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 700 [2020-09-04 23:20:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:22,454 INFO L225 Difference]: With dead ends: 1250 [2020-09-04 23:20:22,455 INFO L226 Difference]: Without dead ends: 983 [2020-09-04 23:20:22,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=9635, Invalid=20815, Unknown=0, NotChecked=0, Total=30450 [2020-09-04 23:20:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-09-04 23:20:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 636. [2020-09-04 23:20:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-09-04 23:20:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 658 transitions. [2020-09-04 23:20:22,583 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 658 transitions. Word has length 700 [2020-09-04 23:20:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:22,584 INFO L479 AbstractCegarLoop]: Abstraction has 636 states and 658 transitions. [2020-09-04 23:20:22,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-09-04 23:20:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 658 transitions. [2020-09-04 23:20:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2020-09-04 23:20:22,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:22,589 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:22,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-09-04 23:20:22,590 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:22,590 INFO L82 PathProgramCache]: Analyzing trace with hash -486926153, now seen corresponding path program 65 times [2020-09-04 23:20:22,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:22,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430631674] [2020-09-04 23:20:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:20:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:20:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:20:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:20:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:20:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:20:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:20:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:20:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:20:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:20:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-09-04 23:20:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-09-04 23:20:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-09-04 23:20:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-09-04 23:20:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-09-04 23:20:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-09-04 23:20:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-09-04 23:20:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-09-04 23:20:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-04 23:20:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-09-04 23:20:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-09-04 23:20:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-09-04 23:20:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-09-04 23:20:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-09-04 23:20:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-09-04 23:20:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-09-04 23:20:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-09-04 23:20:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-09-04 23:20:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2020-09-04 23:20:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2020-09-04 23:20:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 582 [2020-09-04 23:20:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2020-09-04 23:20:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2020-09-04 23:20:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2020-09-04 23:20:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-09-04 23:20:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-09-04 23:20:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 642 [2020-09-04 23:20:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 652 [2020-09-04 23:20:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 662 [2020-09-04 23:20:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 672 [2020-09-04 23:20:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-09-04 23:20:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 692 [2020-09-04 23:20:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14282 backedges. 5588 proven. 5250 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-09-04 23:20:26,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430631674] [2020-09-04 23:20:26,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:26,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 23:20:26,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847636327] [2020-09-04 23:20:26,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 23:20:26,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 23:20:26,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:20:26,913 INFO L87 Difference]: Start difference. First operand 636 states and 658 transitions. Second operand 48 states. [2020-09-04 23:20:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:28,707 INFO L93 Difference]: Finished difference Result 659 states and 682 transitions. [2020-09-04 23:20:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 23:20:28,711 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 706 [2020-09-04 23:20:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:28,715 INFO L225 Difference]: With dead ends: 659 [2020-09-04 23:20:28,716 INFO L226 Difference]: Without dead ends: 657 [2020-09-04 23:20:28,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 23:20:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-09-04 23:20:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 652. [2020-09-04 23:20:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2020-09-04 23:20:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 675 transitions. [2020-09-04 23:20:28,808 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 675 transitions. Word has length 706 [2020-09-04 23:20:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:28,809 INFO L479 AbstractCegarLoop]: Abstraction has 652 states and 675 transitions. [2020-09-04 23:20:28,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 23:20:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 675 transitions. [2020-09-04 23:20:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2020-09-04 23:20:28,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:28,814 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:28,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-09-04 23:20:28,814 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash 182307539, now seen corresponding path program 66 times [2020-09-04 23:20:28,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:28,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191209275] [2020-09-04 23:20:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-04 23:20:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-04 23:20:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-09-04 23:20:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:20:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:20:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:20:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:20:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:20:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:20:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:20:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-09-04 23:20:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-09-04 23:20:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-09-04 23:20:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-09-04 23:20:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-09-04 23:20:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-09-04 23:20:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-09-04 23:20:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-09-04 23:20:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-04 23:20:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-09-04 23:20:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-09-04 23:20:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-09-04 23:20:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-09-04 23:20:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-09-04 23:20:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-09-04 23:20:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-09-04 23:20:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-09-04 23:20:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-09-04 23:20:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2020-09-04 23:20:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2020-09-04 23:20:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 582 [2020-09-04 23:20:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2020-09-04 23:20:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2020-09-04 23:20:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2020-09-04 23:20:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-09-04 23:20:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-09-04 23:20:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 642 [2020-09-04 23:20:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 652 [2020-09-04 23:20:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 662 [2020-09-04 23:20:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 672 [2020-09-04 23:20:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-09-04 23:20:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 692 [2020-09-04 23:20:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 702 [2020-09-04 23:20:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 712 [2020-09-04 23:20:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15140 backedges. 5852 proven. 5504 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-09-04 23:20:40,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191209275] [2020-09-04 23:20:40,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:40,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-09-04 23:20:40,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763620546] [2020-09-04 23:20:40,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-09-04 23:20:40,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:40,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-09-04 23:20:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 23:20:40,528 INFO L87 Difference]: Start difference. First operand 652 states and 675 transitions. Second operand 92 states. [2020-09-04 23:21:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:04,909 INFO L93 Difference]: Finished difference Result 1292 states and 1447 transitions. [2020-09-04 23:21:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-09-04 23:21:04,919 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 726 [2020-09-04 23:21:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:04,924 INFO L225 Difference]: With dead ends: 1292 [2020-09-04 23:21:04,924 INFO L226 Difference]: Without dead ends: 1013 [2020-09-04 23:21:04,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-09-04 23:21:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-09-04 23:21:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 658. [2020-09-04 23:21:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-09-04 23:21:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 681 transitions. [2020-09-04 23:21:05,078 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 681 transitions. Word has length 726 [2020-09-04 23:21:05,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:05,079 INFO L479 AbstractCegarLoop]: Abstraction has 658 states and 681 transitions. [2020-09-04 23:21:05,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-09-04 23:21:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 681 transitions. [2020-09-04 23:21:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2020-09-04 23:21:05,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:05,085 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:05,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-09-04 23:21:05,085 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1499659483, now seen corresponding path program 67 times [2020-09-04 23:21:05,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:05,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665995740] [2020-09-04 23:21:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-04 23:21:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-09-04 23:21:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-09-04 23:21:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:21:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:21:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:21:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:21:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:21:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:21:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:21:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:21:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:21:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-09-04 23:21:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-04 23:21:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:21:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-09-04 23:21:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:21:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:21:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-09-04 23:21:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-09-04 23:21:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-09-04 23:21:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-09-04 23:21:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-09-04 23:21:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-09-04 23:21:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-09-04 23:21:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-09-04 23:21:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-09-04 23:21:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-09-04 23:21:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-09-04 23:21:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-09-04 23:21:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-09-04 23:21:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-09-04 23:21:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-09-04 23:21:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-09-04 23:21:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-09-04 23:21:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 638 [2020-09-04 23:21:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-09-04 23:21:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2020-09-04 23:21:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 668 [2020-09-04 23:21:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2020-09-04 23:21:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-09-04 23:21:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 698 [2020-09-04 23:21:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 708 [2020-09-04 23:21:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:17,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2020-09-04 23:21:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 5852 proven. 5764 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-09-04 23:21:18,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665995740] [2020-09-04 23:21:18,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:18,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-09-04 23:21:18,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888593946] [2020-09-04 23:21:18,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-09-04 23:21:18,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-09-04 23:21:18,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2163, Invalid=6393, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 23:21:18,021 INFO L87 Difference]: Start difference. First operand 658 states and 681 transitions. Second operand 93 states. [2020-09-04 23:21:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:44,711 INFO L93 Difference]: Finished difference Result 1306 states and 1464 transitions. [2020-09-04 23:21:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-09-04 23:21:44,712 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 732 [2020-09-04 23:21:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:44,714 INFO L225 Difference]: With dead ends: 1306 [2020-09-04 23:21:44,715 INFO L226 Difference]: Without dead ends: 1027 [2020-09-04 23:21:44,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=10533, Invalid=22773, Unknown=0, NotChecked=0, Total=33306 [2020-09-04 23:21:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2020-09-04 23:21:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 664. [2020-09-04 23:21:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-09-04 23:21:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 687 transitions. [2020-09-04 23:21:44,818 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 687 transitions. Word has length 732 [2020-09-04 23:21:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:44,819 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 687 transitions. [2020-09-04 23:21:44,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-09-04 23:21:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 687 transitions. [2020-09-04 23:21:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2020-09-04 23:21:44,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:44,824 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:44,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-09-04 23:21:44,825 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1897101085, now seen corresponding path program 68 times [2020-09-04 23:21:44,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:44,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547781809] [2020-09-04 23:21:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:21:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:21:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:21:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:21:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:21:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:21:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:21:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:21:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:21:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:21:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:21:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:21:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-09-04 23:21:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-09-04 23:21:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-09-04 23:21:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:21:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-09-04 23:21:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-09-04 23:21:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-09-04 23:21:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-09-04 23:21:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-09-04 23:21:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-09-04 23:21:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-09-04 23:21:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-09-04 23:21:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-09-04 23:21:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-09-04 23:21:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-09-04 23:21:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-09-04 23:21:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-09-04 23:21:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-09-04 23:21:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 594 [2020-09-04 23:21:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2020-09-04 23:21:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2020-09-04 23:21:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 624 [2020-09-04 23:21:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2020-09-04 23:21:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2020-09-04 23:21:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 654 [2020-09-04 23:21:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 664 [2020-09-04 23:21:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 674 [2020-09-04 23:21:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2020-09-04 23:21:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 694 [2020-09-04 23:21:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 704 [2020-09-04 23:21:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 714 [2020-09-04 23:21:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 724 [2020-09-04 23:21:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15666 backedges. 6118 proven. 5764 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-09-04 23:21:50,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547781809] [2020-09-04 23:21:50,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:50,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-04 23:21:50,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141902569] [2020-09-04 23:21:50,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 23:21:50,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 23:21:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 23:21:50,483 INFO L87 Difference]: Start difference. First operand 664 states and 687 transitions. Second operand 50 states. [2020-09-04 23:21:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:52,690 INFO L93 Difference]: Finished difference Result 687 states and 711 transitions. [2020-09-04 23:21:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-04 23:21:52,694 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 738 [2020-09-04 23:21:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:52,698 INFO L225 Difference]: With dead ends: 687 [2020-09-04 23:21:52,698 INFO L226 Difference]: Without dead ends: 685 [2020-09-04 23:21:52,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:21:52,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-09-04 23:21:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 680. [2020-09-04 23:21:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-09-04 23:21:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 704 transitions. [2020-09-04 23:21:52,789 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 704 transitions. Word has length 738 [2020-09-04 23:21:52,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:52,790 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 704 transitions. [2020-09-04 23:21:52,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 23:21:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 704 transitions. [2020-09-04 23:21:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2020-09-04 23:21:52,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:52,796 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:52,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-09-04 23:21:52,796 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1602383103, now seen corresponding path program 69 times [2020-09-04 23:21:52,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:52,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658255356] [2020-09-04 23:21:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-04 23:22:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-09-04 23:22:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-04 23:22:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:22:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:22:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:22:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:22:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:22:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:22:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:22:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:22:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:22:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-09-04 23:22:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-09-04 23:22:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-09-04 23:22:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:22:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-09-04 23:22:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-09-04 23:22:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-09-04 23:22:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-09-04 23:22:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-09-04 23:22:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-09-04 23:22:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-09-04 23:22:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-09-04 23:22:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-09-04 23:22:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-09-04 23:22:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-09-04 23:22:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-09-04 23:22:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-09-04 23:22:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-09-04 23:22:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 594 [2020-09-04 23:22:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2020-09-04 23:22:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2020-09-04 23:22:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 624 [2020-09-04 23:22:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2020-09-04 23:22:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2020-09-04 23:22:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 654 [2020-09-04 23:22:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 664 [2020-09-04 23:22:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 674 [2020-09-04 23:22:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2020-09-04 23:22:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 694 [2020-09-04 23:22:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 704 [2020-09-04 23:22:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 714 [2020-09-04 23:22:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 724 [2020-09-04 23:22:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 734 [2020-09-04 23:22:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 744 [2020-09-04 23:22:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16564 backedges. 6394 proven. 6030 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-09-04 23:22:07,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658255356] [2020-09-04 23:22:07,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:07,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-09-04 23:22:07,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233532198] [2020-09-04 23:22:07,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-09-04 23:22:07,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-09-04 23:22:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 23:22:07,796 INFO L87 Difference]: Start difference. First operand 680 states and 704 transitions. Second operand 96 states. [2020-09-04 23:22:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:38,208 INFO L93 Difference]: Finished difference Result 1348 states and 1510 transitions. [2020-09-04 23:22:38,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-09-04 23:22:38,213 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 758 [2020-09-04 23:22:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:38,217 INFO L225 Difference]: With dead ends: 1348 [2020-09-04 23:22:38,217 INFO L226 Difference]: Without dead ends: 1057 [2020-09-04 23:22:38,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-09-04 23:22:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2020-09-04 23:22:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 686. [2020-09-04 23:22:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2020-09-04 23:22:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 710 transitions. [2020-09-04 23:22:38,321 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 710 transitions. Word has length 758 [2020-09-04 23:22:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:38,321 INFO L479 AbstractCegarLoop]: Abstraction has 686 states and 710 transitions. [2020-09-04 23:22:38,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-09-04 23:22:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 710 transitions. [2020-09-04 23:22:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2020-09-04 23:22:38,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:38,327 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:38,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-09-04 23:22:38,327 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:38,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1803386631, now seen corresponding path program 70 times [2020-09-04 23:22:38,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:38,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057437386] [2020-09-04 23:22:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-04 23:22:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-04 23:22:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-09-04 23:22:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:22:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:22:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:22:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:22:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-09-04 23:22:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-04 23:22:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:22:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-09-04 23:22:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-09-04 23:22:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-09-04 23:22:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-09-04 23:22:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-09-04 23:22:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-09-04 23:22:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-09-04 23:22:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-09-04 23:22:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-09-04 23:22:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-09-04 23:22:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-09-04 23:22:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-09-04 23:22:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-09-04 23:22:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-09-04 23:22:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-09-04 23:22:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-09-04 23:22:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-09-04 23:22:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-09-04 23:22:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-09-04 23:22:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-09-04 23:22:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 600 [2020-09-04 23:22:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 610 [2020-09-04 23:22:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 620 [2020-09-04 23:22:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2020-09-04 23:22:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-09-04 23:22:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 650 [2020-09-04 23:22:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-09-04 23:22:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2020-09-04 23:22:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 680 [2020-09-04 23:22:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 690 [2020-09-04 23:22:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2020-09-04 23:22:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 710 [2020-09-04 23:22:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 720 [2020-09-04 23:22:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 730 [2020-09-04 23:22:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 740 [2020-09-04 23:22:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 750 [2020-09-04 23:22:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 6394 proven. 6302 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-09-04 23:22:54,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057437386] [2020-09-04 23:22:54,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:54,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-09-04 23:22:54,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308798966] [2020-09-04 23:22:54,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-09-04 23:22:54,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-09-04 23:22:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=6959, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 23:22:54,637 INFO L87 Difference]: Start difference. First operand 686 states and 710 transitions. Second operand 97 states. [2020-09-04 23:23:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:23:26,294 INFO L93 Difference]: Finished difference Result 1362 states and 1527 transitions. [2020-09-04 23:23:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-09-04 23:23:26,294 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 764 [2020-09-04 23:23:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:23:26,297 INFO L225 Difference]: With dead ends: 1362 [2020-09-04 23:23:26,297 INFO L226 Difference]: Without dead ends: 1071 [2020-09-04 23:23:26,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=11471, Invalid=24819, Unknown=0, NotChecked=0, Total=36290 [2020-09-04 23:23:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2020-09-04 23:23:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 692. [2020-09-04 23:23:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-09-04 23:23:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 716 transitions. [2020-09-04 23:23:26,399 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 716 transitions. Word has length 764 [2020-09-04 23:23:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:23:26,400 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 716 transitions. [2020-09-04 23:23:26,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-09-04 23:23:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 716 transitions. [2020-09-04 23:23:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2020-09-04 23:23:26,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:23:26,406 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:23:26,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-09-04 23:23:26,406 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:23:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:23:26,407 INFO L82 PathProgramCache]: Analyzing trace with hash 647293711, now seen corresponding path program 71 times [2020-09-04 23:23:26,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:23:26,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256457943] [2020-09-04 23:23:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:23:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:23:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:23:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:23:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:23:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:23:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:23:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:23:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:23:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-09-04 23:23:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:23:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-09-04 23:23:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-09-04 23:23:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-09-04 23:23:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-09-04 23:23:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-09-04 23:23:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-09-04 23:23:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-09-04 23:23:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-09-04 23:23:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-09-04 23:23:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-09-04 23:23:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-09-04 23:23:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-09-04 23:23:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-09-04 23:23:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-09-04 23:23:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-09-04 23:23:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-09-04 23:23:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-09-04 23:23:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-09-04 23:23:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-09-04 23:23:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-09-04 23:23:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-09-04 23:23:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2020-09-04 23:23:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2020-09-04 23:23:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 626 [2020-09-04 23:23:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 636 [2020-09-04 23:23:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 646 [2020-09-04 23:23:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 656 [2020-09-04 23:23:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 666 [2020-09-04 23:23:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 676 [2020-09-04 23:23:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-09-04 23:23:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 696 [2020-09-04 23:23:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 706 [2020-09-04 23:23:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 716 [2020-09-04 23:23:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 726 [2020-09-04 23:23:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2020-09-04 23:23:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 746 [2020-09-04 23:23:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2020-09-04 23:23:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17114 backedges. 6672 proven. 6302 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-09-04 23:23:32,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256457943] [2020-09-04 23:23:32,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:23:32,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-04 23:23:32,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300497686] [2020-09-04 23:23:32,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 23:23:32,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:23:32,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 23:23:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:23:32,950 INFO L87 Difference]: Start difference. First operand 692 states and 716 transitions. Second operand 52 states. [2020-09-04 23:23:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:23:35,733 INFO L93 Difference]: Finished difference Result 715 states and 740 transitions. [2020-09-04 23:23:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-04 23:23:35,738 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 770 [2020-09-04 23:23:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:23:35,741 INFO L225 Difference]: With dead ends: 715 [2020-09-04 23:23:35,741 INFO L226 Difference]: Without dead ends: 713 [2020-09-04 23:23:35,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:23:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-09-04 23:23:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 708. [2020-09-04 23:23:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-09-04 23:23:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 733 transitions. [2020-09-04 23:23:35,848 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 733 transitions. Word has length 770 [2020-09-04 23:23:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:23:35,849 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 733 transitions. [2020-09-04 23:23:35,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 23:23:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 733 transitions. [2020-09-04 23:23:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2020-09-04 23:23:35,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:23:35,855 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:23:35,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-09-04 23:23:35,856 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:23:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:23:35,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1265631531, now seen corresponding path program 72 times [2020-09-04 23:23:35,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:23:35,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319381489] [2020-09-04 23:23:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:23:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:23:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-09-04 23:23:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-09-04 23:23:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-09-04 23:23:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-09-04 23:23:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-09-04 23:23:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-09-04 23:23:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-09-04 23:23:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-09-04 23:23:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:23:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-09-04 23:23:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-09-04 23:23:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-09-04 23:23:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-09-04 23:23:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-09-04 23:23:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-09-04 23:23:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-09-04 23:23:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-09-04 23:23:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-09-04 23:23:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-09-04 23:23:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-09-04 23:23:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-09-04 23:23:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-09-04 23:23:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-09-04 23:23:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-09-04 23:23:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-09-04 23:23:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-09-04 23:23:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-09-04 23:23:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-09-04 23:23:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-09-04 23:23:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-09-04 23:23:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2020-09-04 23:23:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2020-09-04 23:23:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 626 [2020-09-04 23:23:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 636 [2020-09-04 23:23:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 646 [2020-09-04 23:23:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 656 [2020-09-04 23:23:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 666 [2020-09-04 23:23:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 676 [2020-09-04 23:23:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-09-04 23:23:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 696 [2020-09-04 23:23:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 706 [2020-09-04 23:23:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 716 [2020-09-04 23:23:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 726 [2020-09-04 23:23:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2020-09-04 23:23:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 746 [2020-09-04 23:23:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2020-09-04 23:23:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 766 [2020-09-04 23:23:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:53,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 776 [2020-09-04 23:23:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18052 backedges. 6960 proven. 6580 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-09-04 23:23:54,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319381489] [2020-09-04 23:23:54,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:23:54,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-09-04 23:23:54,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372548808] [2020-09-04 23:23:54,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-09-04 23:23:54,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:23:54,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-09-04 23:23:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-09-04 23:23:54,298 INFO L87 Difference]: Start difference. First operand 708 states and 733 transitions. Second operand 100 states. [2020-09-04 23:24:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:24:24,933 INFO L93 Difference]: Finished difference Result 1404 states and 1573 transitions. [2020-09-04 23:24:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-09-04 23:24:24,937 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 790 [2020-09-04 23:24:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:24:24,941 INFO L225 Difference]: With dead ends: 1404 [2020-09-04 23:24:24,941 INFO L226 Difference]: Without dead ends: 1101 [2020-09-04 23:24:24,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-09-04 23:24:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-04 23:24:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 714. [2020-09-04 23:24:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2020-09-04 23:24:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 739 transitions. [2020-09-04 23:24:25,124 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 739 transitions. Word has length 790 [2020-09-04 23:24:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:24:25,124 INFO L479 AbstractCegarLoop]: Abstraction has 714 states and 739 transitions. [2020-09-04 23:24:25,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-09-04 23:24:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 739 transitions. [2020-09-04 23:24:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2020-09-04 23:24:25,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:24:25,135 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:24:25,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-09-04 23:24:25,136 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:24:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:24:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash -983502029, now seen corresponding path program 73 times [2020-09-04 23:24:25,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:24:25,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635388418] [2020-09-04 23:24:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:24:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:24:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-09-04 23:24:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-09-04 23:24:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-04 23:24:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-09-04 23:24:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-09-04 23:24:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-09-04 23:24:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 23:24:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-09-04 23:24:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-09-04 23:24:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-09-04 23:24:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-09-04 23:24:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-09-04 23:24:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-09-04 23:24:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-09-04 23:24:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-09-04 23:24:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-04 23:24:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-09-04 23:24:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-09-04 23:24:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-09-04 23:24:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-09-04 23:24:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-09-04 23:24:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-09-04 23:24:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-09-04 23:24:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-09-04 23:24:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-09-04 23:24:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2020-09-04 23:24:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2020-09-04 23:24:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 582 [2020-09-04 23:24:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2020-09-04 23:24:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2020-09-04 23:24:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2020-09-04 23:24:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-09-04 23:24:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-09-04 23:24:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 642 [2020-09-04 23:24:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 652 [2020-09-04 23:24:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 662 [2020-09-04 23:24:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 672 [2020-09-04 23:24:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-09-04 23:24:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 692 [2020-09-04 23:24:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 702 [2020-09-04 23:24:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 712 [2020-09-04 23:24:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 722 [2020-09-04 23:24:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 732 [2020-09-04 23:24:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 742 [2020-09-04 23:24:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 752 [2020-09-04 23:24:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 762 [2020-09-04 23:24:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 772 [2020-09-04 23:24:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 782 [2020-09-04 23:24:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 6960 proven. 6864 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-09-04 23:24:39,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635388418] [2020-09-04 23:24:39,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:24:39,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-09-04 23:24:39,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47723748] [2020-09-04 23:24:39,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-09-04 23:24:39,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:24:39,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-09-04 23:24:39,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2551, Invalid=7549, Unknown=0, NotChecked=0, Total=10100 [2020-09-04 23:24:39,949 INFO L87 Difference]: Start difference. First operand 714 states and 739 transitions. Second operand 101 states. [2020-09-04 23:25:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:25:08,052 INFO L93 Difference]: Finished difference Result 1418 states and 1590 transitions. [2020-09-04 23:25:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2020-09-04 23:25:08,053 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 796 [2020-09-04 23:25:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:25:08,055 INFO L225 Difference]: With dead ends: 1418 [2020-09-04 23:25:08,055 INFO L226 Difference]: Without dead ends: 1115 [2020-09-04 23:25:08,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=12449, Invalid=26953, Unknown=0, NotChecked=0, Total=39402 [2020-09-04 23:25:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-09-04 23:25:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 720. [2020-09-04 23:25:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-09-04 23:25:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 745 transitions. [2020-09-04 23:25:08,157 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 745 transitions. Word has length 796 [2020-09-04 23:25:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:25:08,157 INFO L479 AbstractCegarLoop]: Abstraction has 720 states and 745 transitions. [2020-09-04 23:25:08,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-09-04 23:25:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 745 transitions. [2020-09-04 23:25:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2020-09-04 23:25:08,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:25:08,163 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:25:08,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-09-04 23:25:08,163 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:25:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:25:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1451638587, now seen corresponding path program 74 times [2020-09-04 23:25:08,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:25:08,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532889470] [2020-09-04 23:25:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:25:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:25:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:25:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:25:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:25:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:25:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:25:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:25:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:25:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:25:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:25:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-09-04 23:25:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-04 23:25:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:25:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-09-04 23:25:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:25:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:25:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-09-04 23:25:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-09-04 23:25:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-09-04 23:25:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-09-04 23:25:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-09-04 23:25:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-09-04 23:25:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-09-04 23:25:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-09-04 23:25:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-09-04 23:25:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-09-04 23:25:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-09-04 23:25:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-09-04 23:25:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-09-04 23:25:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-09-04 23:25:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-09-04 23:25:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-09-04 23:25:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-09-04 23:25:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 638 [2020-09-04 23:25:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-09-04 23:25:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2020-09-04 23:25:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 668 [2020-09-04 23:25:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2020-09-04 23:25:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-09-04 23:25:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 698 [2020-09-04 23:25:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 708 [2020-09-04 23:25:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2020-09-04 23:25:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 728 [2020-09-04 23:25:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 738 [2020-09-04 23:25:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 748 [2020-09-04 23:25:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-09-04 23:25:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 768 [2020-09-04 23:25:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 778 [2020-09-04 23:25:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 788 [2020-09-04 23:25:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18626 backedges. 7250 proven. 6864 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-09-04 23:25:13,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532889470] [2020-09-04 23:25:13,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:25:13,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-09-04 23:25:13,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604717561] [2020-09-04 23:25:13,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 23:25:13,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:25:13,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 23:25:13,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 23:25:13,641 INFO L87 Difference]: Start difference. First operand 720 states and 745 transitions. Second operand 54 states. [2020-09-04 23:25:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:25:15,574 INFO L93 Difference]: Finished difference Result 743 states and 769 transitions. [2020-09-04 23:25:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 23:25:15,577 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 802 [2020-09-04 23:25:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:25:15,581 INFO L225 Difference]: With dead ends: 743 [2020-09-04 23:25:15,581 INFO L226 Difference]: Without dead ends: 741 [2020-09-04 23:25:15,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 23:25:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-09-04 23:25:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 736. [2020-09-04 23:25:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-09-04 23:25:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 762 transitions. [2020-09-04 23:25:15,770 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 762 transitions. Word has length 802 [2020-09-04 23:25:15,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:25:15,772 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 762 transitions. [2020-09-04 23:25:15,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 23:25:15,772 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 762 transitions. [2020-09-04 23:25:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2020-09-04 23:25:15,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:25:15,783 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:25:15,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-09-04 23:25:15,784 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:25:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:25:15,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1941538647, now seen corresponding path program 75 times [2020-09-04 23:25:15,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:25:15,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827853661] [2020-09-04 23:25:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:25:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:25:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-09-04 23:25:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-09-04 23:25:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-09-04 23:25:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-09-04 23:25:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-09-04 23:25:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:25:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-09-04 23:25:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-09-04 23:25:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-09-04 23:25:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-09-04 23:25:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-04 23:25:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:25:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-09-04 23:25:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:25:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:25:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-09-04 23:25:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-09-04 23:25:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-09-04 23:25:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-09-04 23:25:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-09-04 23:25:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-09-04 23:25:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-09-04 23:25:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-09-04 23:25:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-09-04 23:25:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-09-04 23:25:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-09-04 23:25:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-09-04 23:25:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-09-04 23:25:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-09-04 23:25:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-09-04 23:25:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-09-04 23:25:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-09-04 23:25:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 638 [2020-09-04 23:25:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-09-04 23:25:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2020-09-04 23:25:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 668 [2020-09-04 23:25:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2020-09-04 23:25:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-09-04 23:25:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 698 [2020-09-04 23:25:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 708 [2020-09-04 23:25:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2020-09-04 23:25:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 728 [2020-09-04 23:25:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 738 [2020-09-04 23:25:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 748 [2020-09-04 23:25:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-09-04 23:25:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 768 [2020-09-04 23:25:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 778 [2020-09-04 23:25:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 788 [2020-09-04 23:25:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 798 [2020-09-04 23:25:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2020-09-04 23:25:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19604 backedges. 7550 proven. 7154 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-09-04 23:25:31,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827853661] [2020-09-04 23:25:31,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:25:31,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-09-04 23:25:31,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074718586] [2020-09-04 23:25:31,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-09-04 23:25:31,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:25:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-09-04 23:25:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-09-04 23:25:31,992 INFO L87 Difference]: Start difference. First operand 736 states and 762 transitions. Second operand 104 states. [2020-09-04 23:26:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:26:02,221 INFO L93 Difference]: Finished difference Result 1460 states and 1636 transitions. [2020-09-04 23:26:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2020-09-04 23:26:02,226 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 822 [2020-09-04 23:26:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:26:02,230 INFO L225 Difference]: With dead ends: 1460 [2020-09-04 23:26:02,230 INFO L226 Difference]: Without dead ends: 1145 [2020-09-04 23:26:02,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-09-04 23:26:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2020-09-04 23:26:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 742. [2020-09-04 23:26:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-09-04 23:26:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 768 transitions. [2020-09-04 23:26:02,443 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 768 transitions. Word has length 822 [2020-09-04 23:26:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:26:02,444 INFO L479 AbstractCegarLoop]: Abstraction has 742 states and 768 transitions. [2020-09-04 23:26:02,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-09-04 23:26:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 768 transitions. [2020-09-04 23:26:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-09-04 23:26:02,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:26:02,458 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:26:02,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-09-04 23:26:02,458 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:26:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:26:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash 203446623, now seen corresponding path program 76 times [2020-09-04 23:26:02,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:26:02,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562208877] [2020-09-04 23:26:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:26:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:26:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-09-04 23:26:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-09-04 23:26:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-04 23:26:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-09-04 23:26:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-09-04 23:26:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-09-04 23:26:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-09-04 23:26:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-09-04 23:26:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-04 23:26:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-09-04 23:26:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-09-04 23:26:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-09-04 23:26:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:26:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-09-04 23:26:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-09-04 23:26:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-09-04 23:26:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-09-04 23:26:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-09-04 23:26:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-09-04 23:26:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-09-04 23:26:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-09-04 23:26:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-09-04 23:26:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-09-04 23:26:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-09-04 23:26:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-09-04 23:26:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-09-04 23:26:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-09-04 23:26:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 594 [2020-09-04 23:26:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2020-09-04 23:26:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2020-09-04 23:26:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 624 [2020-09-04 23:26:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2020-09-04 23:26:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2020-09-04 23:26:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 654 [2020-09-04 23:26:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 664 [2020-09-04 23:26:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 674 [2020-09-04 23:26:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2020-09-04 23:26:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 694 [2020-09-04 23:26:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 704 [2020-09-04 23:26:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 714 [2020-09-04 23:26:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 724 [2020-09-04 23:26:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 734 [2020-09-04 23:26:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 744 [2020-09-04 23:26:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 754 [2020-09-04 23:26:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 764 [2020-09-04 23:26:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 774 [2020-09-04 23:26:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 784 [2020-09-04 23:26:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 794 [2020-09-04 23:26:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 804 [2020-09-04 23:26:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 814 [2020-09-04 23:26:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 7550 proven. 7450 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-09-04 23:26:18,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562208877] [2020-09-04 23:26:18,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:26:18,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2020-09-04 23:26:18,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784101542] [2020-09-04 23:26:18,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-09-04 23:26:18,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:26:18,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-09-04 23:26:18,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2757, Invalid=8163, Unknown=0, NotChecked=0, Total=10920 [2020-09-04 23:26:18,742 INFO L87 Difference]: Start difference. First operand 742 states and 768 transitions. Second operand 105 states. [2020-09-04 23:26:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:26:50,535 INFO L93 Difference]: Finished difference Result 1474 states and 1653 transitions. [2020-09-04 23:26:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-09-04 23:26:50,536 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 828 [2020-09-04 23:26:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:26:50,540 INFO L225 Difference]: With dead ends: 1474 [2020-09-04 23:26:50,540 INFO L226 Difference]: Without dead ends: 1159 [2020-09-04 23:26:50,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=13467, Invalid=29175, Unknown=0, NotChecked=0, Total=42642 [2020-09-04 23:26:50,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-09-04 23:26:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 748. [2020-09-04 23:26:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-09-04 23:26:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 774 transitions. [2020-09-04 23:26:50,741 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 774 transitions. Word has length 828 [2020-09-04 23:26:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:26:50,741 INFO L479 AbstractCegarLoop]: Abstraction has 748 states and 774 transitions. [2020-09-04 23:26:50,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-09-04 23:26:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 774 transitions. [2020-09-04 23:26:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-09-04 23:26:50,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:26:50,750 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:26:50,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-09-04 23:26:50,750 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:26:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:26:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1009547929, now seen corresponding path program 77 times [2020-09-04 23:26:50,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:26:50,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730685187] [2020-09-04 23:26:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:26:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:26:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-09-04 23:26:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-04 23:26:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-09-04 23:26:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-04 23:26:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-09-04 23:26:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-04 23:26:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:26:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-09-04 23:26:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-09-04 23:26:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-09-04 23:26:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-09-04 23:26:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-09-04 23:26:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-09-04 23:26:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-09-04 23:26:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-09-04 23:26:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-09-04 23:26:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-09-04 23:26:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-09-04 23:26:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-09-04 23:26:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-09-04 23:26:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-09-04 23:26:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-09-04 23:26:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-09-04 23:26:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-09-04 23:26:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-09-04 23:26:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-09-04 23:26:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-09-04 23:26:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 600 [2020-09-04 23:26:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 610 [2020-09-04 23:26:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 620 [2020-09-04 23:26:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2020-09-04 23:26:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-09-04 23:26:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 650 [2020-09-04 23:26:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-09-04 23:26:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2020-09-04 23:26:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 680 [2020-09-04 23:26:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 690 [2020-09-04 23:26:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2020-09-04 23:26:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 710 [2020-09-04 23:26:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 720 [2020-09-04 23:26:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 730 [2020-09-04 23:26:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 740 [2020-09-04 23:26:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 750 [2020-09-04 23:26:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 760 [2020-09-04 23:26:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 770 [2020-09-04 23:26:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 780 [2020-09-04 23:26:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 790 [2020-09-04 23:26:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 800 [2020-09-04 23:26:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-09-04 23:26:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 820 [2020-09-04 23:26:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20202 backedges. 7852 proven. 7450 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-09-04 23:26:56,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730685187] [2020-09-04 23:26:56,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:26:56,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-09-04 23:26:56,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162538772] [2020-09-04 23:26:56,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 23:26:56,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:26:56,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 23:26:56,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 23:26:56,726 INFO L87 Difference]: Start difference. First operand 748 states and 774 transitions. Second operand 56 states. [2020-09-04 23:26:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:26:58,708 INFO L93 Difference]: Finished difference Result 771 states and 798 transitions. [2020-09-04 23:26:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-04 23:26:58,712 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 834 [2020-09-04 23:26:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:26:58,715 INFO L225 Difference]: With dead ends: 771 [2020-09-04 23:26:58,715 INFO L226 Difference]: Without dead ends: 769 [2020-09-04 23:26:58,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 23:26:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2020-09-04 23:26:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 764. [2020-09-04 23:26:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-09-04 23:26:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 791 transitions. [2020-09-04 23:26:58,905 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 791 transitions. Word has length 834 [2020-09-04 23:26:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:26:58,907 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 791 transitions. [2020-09-04 23:26:58,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 23:26:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 791 transitions. [2020-09-04 23:26:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2020-09-04 23:26:58,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:26:58,919 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 52, 52, 52, 52, 52, 52, 52, 52, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:26:58,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-09-04 23:26:58,920 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:26:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:26:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash 905052035, now seen corresponding path program 78 times [2020-09-04 23:26:58,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:26:58,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757668694] [2020-09-04 23:26:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:26:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat