/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/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:51:00,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:51:00,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:51:00,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 21:51:00,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 21:51:00,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 21:51:00,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 21:51:00,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 21:51:00,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 21:51:00,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 21:51:00,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 21:51:00,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 21:51:00,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:51:00,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:51:00,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:51:00,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:51:00,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:51:00,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:51:00,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:51:00,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:51:00,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:51:00,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:51:00,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:51:00,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:51:00,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:51:00,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 21:51:00,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 21:51:00,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 21:51:00,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 21:51:00,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 21:51:00,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 21:51:00,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 21:51:00,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 21:51:00,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:51:00,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:51:00,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:51:00,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 21:51:00,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:51:00,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:51:00,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:51:00,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:51:00,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:51:00,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:51:00,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:51:00,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:51:00,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:51:00,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:51:00,513 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:51:00,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:51:00,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:51:00,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:51:00,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:51:00,514 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:51:00,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:51:00,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:51:00,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:51:00,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:51:00,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:51:00,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:51:00,516 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 [2020-08-22 21:51:00,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:51:00,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:51:00,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:51:00,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:51:00,811 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:51:00,814 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 21:51:00,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7befdf969/0b1333e0378043efabe11331fa917e82/FLAGc15de1299 [2020-08-22 21:51:01,325 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:51:01,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 21:51:01,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7befdf969/0b1333e0378043efabe11331fa917e82/FLAGc15de1299 [2020-08-22 21:51:01,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7befdf969/0b1333e0378043efabe11331fa917e82 [2020-08-22 21:51:01,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:51:01,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:51:01,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:51:01,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:51:01,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:51:01,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:51:01" (1/1) ... [2020-08-22 21:51:01,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456593db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:01, skipping insertion in model container [2020-08-22 21:51:01,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:51:01" (1/1) ... [2020-08-22 21:51:01,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:51:01,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:51:02,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:51:02,041 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:51:02,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:51:02,185 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:51:02,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02 WrapperNode [2020-08-22 21:51:02,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:51:02,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:51:02,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:51:02,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:51:02,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:51:02,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:51:02,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:51:02,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:51:02,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:51:02,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:51:02,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:51:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 21:51:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 21:51:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 21:51:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 21:51:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:51:02,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:51:02,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 21:51:02,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 21:51:02,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 21:51:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 21:51:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 21:51:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 21:51:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:51:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:51:02,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:51:02,843 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:51:02,844 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 21:51:02,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:51:02 BoogieIcfgContainer [2020-08-22 21:51:02,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:51:02,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:51:02,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:51:02,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:51:02,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:51:01" (1/3) ... [2020-08-22 21:51:02,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a45fcb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:51:02, skipping insertion in model container [2020-08-22 21:51:02,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02" (2/3) ... [2020-08-22 21:51:02,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a45fcb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:51:02, skipping insertion in model container [2020-08-22 21:51:02,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:51:02" (3/3) ... [2020-08-22 21:51:02,860 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-22 21:51:02,871 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:51:02,879 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:51:02,893 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:51:02,913 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:51:02,913 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:51:02,914 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:51:02,914 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:51:02,914 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:51:02,914 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:51:02,915 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:51:02,915 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:51:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-08-22 21:51:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 21:51:02,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:02,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:02,952 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:02,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-08-22 21:51:02,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:02,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843718104] [2020-08-22 21:51:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 21:51:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 21:51:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 21:51:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:03,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843718104] [2020-08-22 21:51:03,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:03,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 21:51:03,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461175851] [2020-08-22 21:51:03,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:51:03,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:03,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:51:03,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:51:03,338 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-08-22 21:51:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:03,536 INFO L93 Difference]: Finished difference Result 286 states and 363 transitions. [2020-08-22 21:51:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 21:51:03,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-08-22 21:51:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:03,553 INFO L225 Difference]: With dead ends: 286 [2020-08-22 21:51:03,553 INFO L226 Difference]: Without dead ends: 168 [2020-08-22 21:51:03,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-22 21:51:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2020-08-22 21:51:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-08-22 21:51:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2020-08-22 21:51:03,625 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 100 [2020-08-22 21:51:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:03,626 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2020-08-22 21:51:03,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:51:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2020-08-22 21:51:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 21:51:03,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:03,632 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:03,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:51:03,633 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:03,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1947593625, now seen corresponding path program 1 times [2020-08-22 21:51:03,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:03,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396563537] [2020-08-22 21:51:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 21:51:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:51:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 21:51:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:03,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396563537] [2020-08-22 21:51:03,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:03,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 21:51:03,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083792729] [2020-08-22 21:51:03,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:51:03,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:51:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:51:03,808 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand 4 states. [2020-08-22 21:51:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:03,924 INFO L93 Difference]: Finished difference Result 278 states and 331 transitions. [2020-08-22 21:51:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:51:03,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-08-22 21:51:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:03,928 INFO L225 Difference]: With dead ends: 278 [2020-08-22 21:51:03,928 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 21:51:03,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 21:51:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-08-22 21:51:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 21:51:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-08-22 21:51:03,956 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 103 [2020-08-22 21:51:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:03,956 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-08-22 21:51:03,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:51:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-08-22 21:51:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 21:51:03,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:03,962 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:03,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:51:03,963 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:03,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1622356113, now seen corresponding path program 1 times [2020-08-22 21:51:03,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:03,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402484903] [2020-08-22 21:51:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 21:51:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 21:51:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 21:51:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:04,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402484903] [2020-08-22 21:51:04,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:04,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 21:51:04,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642776679] [2020-08-22 21:51:04,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 21:51:04,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:04,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 21:51:04,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:04,106 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 5 states. [2020-08-22 21:51:04,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:04,205 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-08-22 21:51:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 21:51:04,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 21:51:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:04,209 INFO L225 Difference]: With dead ends: 314 [2020-08-22 21:51:04,209 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 21:51:04,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 21:51:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2020-08-22 21:51:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 21:51:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-08-22 21:51:04,234 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 108 [2020-08-22 21:51:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:04,235 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-08-22 21:51:04,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 21:51:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-08-22 21:51:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 21:51:04,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:04,240 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:04,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 21:51:04,241 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:04,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1409900093, now seen corresponding path program 1 times [2020-08-22 21:51:04,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:04,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698199365] [2020-08-22 21:51:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 21:51:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 21:51:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 21:51:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:04,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698199365] [2020-08-22 21:51:04,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:04,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 21:51:04,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843861893] [2020-08-22 21:51:04,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 21:51:04,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:04,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 21:51:04,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:04,489 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 5 states. [2020-08-22 21:51:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:04,610 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-08-22 21:51:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 21:51:04,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 21:51:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:04,616 INFO L225 Difference]: With dead ends: 314 [2020-08-22 21:51:04,616 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 21:51:04,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 21:51:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2020-08-22 21:51:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-22 21:51:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2020-08-22 21:51:04,657 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 108 [2020-08-22 21:51:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:04,658 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2020-08-22 21:51:04,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 21:51:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2020-08-22 21:51:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 21:51:04,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:04,663 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:04,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 21:51:04,663 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:04,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2129807001, now seen corresponding path program 2 times [2020-08-22 21:51:04,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:04,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4428575] [2020-08-22 21:51:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 21:51:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:51:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 21:51:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:04,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4428575] [2020-08-22 21:51:04,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:04,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 21:51:04,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958654918] [2020-08-22 21:51:04,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 21:51:04,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 21:51:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:04,793 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand 6 states. [2020-08-22 21:51:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:04,900 INFO L93 Difference]: Finished difference Result 348 states and 416 transitions. [2020-08-22 21:51:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 21:51:04,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-08-22 21:51:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:04,903 INFO L225 Difference]: With dead ends: 348 [2020-08-22 21:51:04,903 INFO L226 Difference]: Without dead ends: 218 [2020-08-22 21:51:04,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:51:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-08-22 21:51:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2020-08-22 21:51:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 21:51:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-08-22 21:51:04,924 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-08-22 21:51:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:04,925 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-08-22 21:51:04,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 21:51:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-08-22 21:51:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 21:51:04,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:04,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:04,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 21:51:04,928 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash -902449205, now seen corresponding path program 1 times [2020-08-22 21:51:04,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:04,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946372638] [2020-08-22 21:51:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 21:51:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:51:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 21:51:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:05,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946372638] [2020-08-22 21:51:05,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:05,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 21:51:05,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536937851] [2020-08-22 21:51:05,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 21:51:05,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 21:51:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:05,079 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 6 states. [2020-08-22 21:51:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:05,210 INFO L93 Difference]: Finished difference Result 342 states and 410 transitions. [2020-08-22 21:51:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 21:51:05,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-08-22 21:51:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:05,213 INFO L225 Difference]: With dead ends: 342 [2020-08-22 21:51:05,213 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 21:51:05,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:51:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 21:51:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-08-22 21:51:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 21:51:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-08-22 21:51:05,258 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-08-22 21:51:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:05,261 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-08-22 21:51:05,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 21:51:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-08-22 21:51:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 21:51:05,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:05,265 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:05,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 21:51:05,266 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:05,266 INFO L82 PathProgramCache]: Analyzing trace with hash 139965841, now seen corresponding path program 3 times [2020-08-22 21:51:05,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:05,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836378823] [2020-08-22 21:51:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 21:51:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 21:51:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 21:51:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:05,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836378823] [2020-08-22 21:51:05,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:05,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 21:51:05,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233264660] [2020-08-22 21:51:05,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:51:05,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:05,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:51:05,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:51:05,457 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 7 states. [2020-08-22 21:51:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:05,610 INFO L93 Difference]: Finished difference Result 375 states and 449 transitions. [2020-08-22 21:51:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 21:51:05,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-08-22 21:51:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:05,616 INFO L225 Difference]: With dead ends: 375 [2020-08-22 21:51:05,616 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 21:51:05,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 21:51:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 196. [2020-08-22 21:51:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 21:51:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-08-22 21:51:05,646 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-08-22 21:51:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:05,647 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-08-22 21:51:05,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:51:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-08-22 21:51:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 21:51:05,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:05,650 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:05,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 21:51:05,651 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1402676931, now seen corresponding path program 2 times [2020-08-22 21:51:05,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:05,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518348585] [2020-08-22 21:51:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 21:51:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 21:51:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 21:51:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:05,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518348585] [2020-08-22 21:51:05,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:05,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 21:51:05,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599381607] [2020-08-22 21:51:05,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:51:05,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:05,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:51:05,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:51:05,852 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 7 states. [2020-08-22 21:51:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:06,020 INFO L93 Difference]: Finished difference Result 361 states and 435 transitions. [2020-08-22 21:51:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 21:51:06,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-08-22 21:51:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:06,023 INFO L225 Difference]: With dead ends: 361 [2020-08-22 21:51:06,023 INFO L226 Difference]: Without dead ends: 228 [2020-08-22 21:51:06,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-08-22 21:51:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2020-08-22 21:51:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 21:51:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-08-22 21:51:06,045 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-08-22 21:51:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:06,045 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-08-22 21:51:06,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:51:06,046 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-08-22 21:51:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 21:51:06,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:06,047 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:06,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 21:51:06,048 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:06,048 INFO L82 PathProgramCache]: Analyzing trace with hash -229056103, now seen corresponding path program 4 times [2020-08-22 21:51:06,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:06,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966335482] [2020-08-22 21:51:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 21:51:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:51:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 21:51:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:06,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966335482] [2020-08-22 21:51:06,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:06,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 21:51:06,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425732030] [2020-08-22 21:51:06,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:51:06,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:06,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:51:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:06,168 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 8 states. [2020-08-22 21:51:06,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:06,310 INFO L93 Difference]: Finished difference Result 402 states and 482 transitions. [2020-08-22 21:51:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 21:51:06,311 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-08-22 21:51:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:06,313 INFO L225 Difference]: With dead ends: 402 [2020-08-22 21:51:06,313 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 21:51:06,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 21:51:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 206. [2020-08-22 21:51:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 21:51:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-08-22 21:51:06,337 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-08-22 21:51:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:06,338 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-08-22 21:51:06,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:51:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-08-22 21:51:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 21:51:06,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:06,340 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:06,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 21:51:06,340 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1033654987, now seen corresponding path program 3 times [2020-08-22 21:51:06,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:06,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333474027] [2020-08-22 21:51:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 21:51:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:51:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 21:51:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:06,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333474027] [2020-08-22 21:51:06,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:06,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 21:51:06,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966183844] [2020-08-22 21:51:06,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:51:06,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:06,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:51:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:06,506 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 8 states. [2020-08-22 21:51:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:06,689 INFO L93 Difference]: Finished difference Result 380 states and 460 transitions. [2020-08-22 21:51:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 21:51:06,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-08-22 21:51:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:06,693 INFO L225 Difference]: With dead ends: 380 [2020-08-22 21:51:06,693 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 21:51:06,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 21:51:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2020-08-22 21:51:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 21:51:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-08-22 21:51:06,734 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-08-22 21:51:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:06,734 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-08-22 21:51:06,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:51:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-08-22 21:51:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 21:51:06,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:06,738 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:06,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 21:51:06,738 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:06,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1138358929, now seen corresponding path program 5 times [2020-08-22 21:51:06,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:06,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919699598] [2020-08-22 21:51:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 21:51:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 21:51:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 21:51:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:06,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919699598] [2020-08-22 21:51:06,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:06,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 21:51:06,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503066045] [2020-08-22 21:51:06,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 21:51:06,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 21:51:06,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:06,913 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 9 states. [2020-08-22 21:51:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:07,142 INFO L93 Difference]: Finished difference Result 429 states and 515 transitions. [2020-08-22 21:51:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 21:51:07,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-08-22 21:51:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:07,150 INFO L225 Difference]: With dead ends: 429 [2020-08-22 21:51:07,150 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 21:51:07,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 21:51:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2020-08-22 21:51:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 21:51:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-08-22 21:51:07,195 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-08-22 21:51:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:07,196 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-08-22 21:51:07,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 21:51:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-08-22 21:51:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 21:51:07,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:07,200 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:07,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 21:51:07,201 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1893897277, now seen corresponding path program 4 times [2020-08-22 21:51:07,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:07,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198690378] [2020-08-22 21:51:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 21:51:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 21:51:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 21:51:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:07,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198690378] [2020-08-22 21:51:07,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:07,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 21:51:07,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583429775] [2020-08-22 21:51:07,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 21:51:07,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:07,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 21:51:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:07,490 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 9 states. [2020-08-22 21:51:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:07,737 INFO L93 Difference]: Finished difference Result 399 states and 485 transitions. [2020-08-22 21:51:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 21:51:07,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-08-22 21:51:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:07,740 INFO L225 Difference]: With dead ends: 399 [2020-08-22 21:51:07,740 INFO L226 Difference]: Without dead ends: 256 [2020-08-22 21:51:07,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-22 21:51:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2020-08-22 21:51:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 21:51:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-08-22 21:51:07,762 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-08-22 21:51:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:07,763 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-08-22 21:51:07,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 21:51:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-08-22 21:51:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 21:51:07,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:07,765 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:07,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 21:51:07,766 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:07,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1450818713, now seen corresponding path program 6 times [2020-08-22 21:51:07,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:07,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283953965] [2020-08-22 21:51:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 21:51:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:51:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 21:51:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:07,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283953965] [2020-08-22 21:51:07,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:07,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:07,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628934926] [2020-08-22 21:51:07,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:07,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:07,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:07,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:07,919 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 10 states. [2020-08-22 21:51:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:08,096 INFO L93 Difference]: Finished difference Result 456 states and 548 transitions. [2020-08-22 21:51:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 21:51:08,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-22 21:51:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:08,099 INFO L225 Difference]: With dead ends: 456 [2020-08-22 21:51:08,099 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 21:51:08,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 21:51:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2020-08-22 21:51:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 21:51:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-08-22 21:51:08,123 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-08-22 21:51:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:08,123 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-08-22 21:51:08,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-08-22 21:51:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 21:51:08,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:08,126 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:08,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 21:51:08,126 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:08,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1581437493, now seen corresponding path program 5 times [2020-08-22 21:51:08,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:08,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406914251] [2020-08-22 21:51:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 21:51:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:51:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 21:51:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 7 proven. 89 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:08,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406914251] [2020-08-22 21:51:08,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:08,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:08,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200392416] [2020-08-22 21:51:08,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:08,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:08,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:08,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:08,318 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 10 states. [2020-08-22 21:51:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:08,556 INFO L93 Difference]: Finished difference Result 418 states and 510 transitions. [2020-08-22 21:51:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 21:51:08,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-22 21:51:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:08,559 INFO L225 Difference]: With dead ends: 418 [2020-08-22 21:51:08,559 INFO L226 Difference]: Without dead ends: 270 [2020-08-22 21:51:08,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-08-22 21:51:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 226. [2020-08-22 21:51:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 21:51:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-08-22 21:51:08,582 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-08-22 21:51:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:08,583 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-08-22 21:51:08,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-08-22 21:51:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 21:51:08,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:08,585 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:08,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 21:51:08,586 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:08,586 INFO L82 PathProgramCache]: Analyzing trace with hash 688521105, now seen corresponding path program 7 times [2020-08-22 21:51:08,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:08,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733962253] [2020-08-22 21:51:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 21:51:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 21:51:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 21:51:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 6 proven. 131 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:08,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733962253] [2020-08-22 21:51:08,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:08,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 21:51:08,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489620979] [2020-08-22 21:51:08,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 21:51:08,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:08,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 21:51:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:08,758 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 11 states. [2020-08-22 21:51:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:08,920 INFO L93 Difference]: Finished difference Result 483 states and 581 transitions. [2020-08-22 21:51:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:08,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-08-22 21:51:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:08,924 INFO L225 Difference]: With dead ends: 483 [2020-08-22 21:51:08,924 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 21:51:08,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 21:51:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 236. [2020-08-22 21:51:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 21:51:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-08-22 21:51:08,949 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-08-22 21:51:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:08,950 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-08-22 21:51:08,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 21:51:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-08-22 21:51:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 21:51:08,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:08,952 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:08,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 21:51:08,953 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1951232195, now seen corresponding path program 6 times [2020-08-22 21:51:08,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:08,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965825484] [2020-08-22 21:51:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 21:51:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 21:51:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 21:51:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:09,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965825484] [2020-08-22 21:51:09,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:09,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 21:51:09,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131691764] [2020-08-22 21:51:09,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 21:51:09,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 21:51:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:09,205 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 11 states. [2020-08-22 21:51:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:09,544 INFO L93 Difference]: Finished difference Result 437 states and 535 transitions. [2020-08-22 21:51:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:09,544 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-08-22 21:51:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:09,547 INFO L225 Difference]: With dead ends: 437 [2020-08-22 21:51:09,547 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 21:51:09,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 21:51:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 236. [2020-08-22 21:51:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 21:51:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-08-22 21:51:09,576 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-08-22 21:51:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:09,577 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-08-22 21:51:09,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 21:51:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-08-22 21:51:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 21:51:09,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:09,580 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:09,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 21:51:09,580 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1216030823, now seen corresponding path program 8 times [2020-08-22 21:51:09,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:09,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19285074] [2020-08-22 21:51:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 21:51:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 21:51:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 21:51:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19285074] [2020-08-22 21:51:09,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:09,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 21:51:09,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24859324] [2020-08-22 21:51:09,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 21:51:09,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 21:51:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:09,808 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 12 states. [2020-08-22 21:51:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:10,022 INFO L93 Difference]: Finished difference Result 510 states and 614 transitions. [2020-08-22 21:51:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 21:51:10,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-22 21:51:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:10,026 INFO L225 Difference]: With dead ends: 510 [2020-08-22 21:51:10,026 INFO L226 Difference]: Without dead ends: 350 [2020-08-22 21:51:10,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-08-22 21:51:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 246. [2020-08-22 21:51:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 21:51:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-08-22 21:51:10,053 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-08-22 21:51:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:10,053 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-08-22 21:51:10,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 21:51:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-08-22 21:51:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 21:51:10,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:10,056 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:10,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 21:51:10,056 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash 46680267, now seen corresponding path program 7 times [2020-08-22 21:51:10,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:10,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507115955] [2020-08-22 21:51:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 21:51:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 21:51:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 21:51:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:10,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507115955] [2020-08-22 21:51:10,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:10,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 21:51:10,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940953168] [2020-08-22 21:51:10,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 21:51:10,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 21:51:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:10,407 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 12 states. [2020-08-22 21:51:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:10,797 INFO L93 Difference]: Finished difference Result 456 states and 560 transitions. [2020-08-22 21:51:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 21:51:10,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-22 21:51:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:10,801 INFO L225 Difference]: With dead ends: 456 [2020-08-22 21:51:10,801 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 21:51:10,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 21:51:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2020-08-22 21:51:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 21:51:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-08-22 21:51:10,843 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-08-22 21:51:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:10,844 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-08-22 21:51:10,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 21:51:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-08-22 21:51:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 21:51:10,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:10,848 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:10,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 21:51:10,848 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash -910703471, now seen corresponding path program 9 times [2020-08-22 21:51:10,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:10,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262538444] [2020-08-22 21:51:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 21:51:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 21:51:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 21:51:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:11,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262538444] [2020-08-22 21:51:11,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:11,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 21:51:11,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114365565] [2020-08-22 21:51:11,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 21:51:11,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 21:51:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:11,149 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 13 states. [2020-08-22 21:51:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:11,374 INFO L93 Difference]: Finished difference Result 537 states and 647 transitions. [2020-08-22 21:51:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 21:51:11,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-08-22 21:51:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:11,378 INFO L225 Difference]: With dead ends: 537 [2020-08-22 21:51:11,378 INFO L226 Difference]: Without dead ends: 372 [2020-08-22 21:51:11,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-08-22 21:51:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 256. [2020-08-22 21:51:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 21:51:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-08-22 21:51:11,409 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-08-22 21:51:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:11,410 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-08-22 21:51:11,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 21:51:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-08-22 21:51:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 21:51:11,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:11,412 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:11,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 21:51:11,413 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:11,413 INFO L82 PathProgramCache]: Analyzing trace with hash 352007619, now seen corresponding path program 8 times [2020-08-22 21:51:11,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:11,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457662123] [2020-08-22 21:51:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 21:51:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 21:51:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 21:51:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 7 proven. 194 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:11,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457662123] [2020-08-22 21:51:11,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:11,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 21:51:11,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477055454] [2020-08-22 21:51:11,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 21:51:11,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:11,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 21:51:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:11,717 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 13 states. [2020-08-22 21:51:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:12,070 INFO L93 Difference]: Finished difference Result 475 states and 585 transitions. [2020-08-22 21:51:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 21:51:12,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-08-22 21:51:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:12,073 INFO L225 Difference]: With dead ends: 475 [2020-08-22 21:51:12,073 INFO L226 Difference]: Without dead ends: 312 [2020-08-22 21:51:12,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-08-22 21:51:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 256. [2020-08-22 21:51:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 21:51:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-08-22 21:51:12,102 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-08-22 21:51:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:12,103 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-08-22 21:51:12,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 21:51:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-08-22 21:51:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-22 21:51:12,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:12,106 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:12,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 21:51:12,106 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:12,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:12,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1515572583, now seen corresponding path program 10 times [2020-08-22 21:51:12,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:12,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033876880] [2020-08-22 21:51:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 21:51:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 21:51:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 21:51:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 6 proven. 257 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:12,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033876880] [2020-08-22 21:51:12,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:12,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 21:51:12,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521145473] [2020-08-22 21:51:12,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 21:51:12,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:12,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 21:51:12,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:12,370 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 14 states. [2020-08-22 21:51:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:12,641 INFO L93 Difference]: Finished difference Result 564 states and 680 transitions. [2020-08-22 21:51:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 21:51:12,642 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-08-22 21:51:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:12,645 INFO L225 Difference]: With dead ends: 564 [2020-08-22 21:51:12,645 INFO L226 Difference]: Without dead ends: 394 [2020-08-22 21:51:12,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-22 21:51:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 266. [2020-08-22 21:51:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 21:51:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-08-22 21:51:12,687 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-08-22 21:51:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:12,688 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-08-22 21:51:12,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 21:51:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-08-22 21:51:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-22 21:51:12,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:12,691 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:12,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 21:51:12,693 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash -252861493, now seen corresponding path program 9 times [2020-08-22 21:51:12,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:12,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569231526] [2020-08-22 21:51:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 21:51:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 21:51:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 21:51:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 7 proven. 239 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:13,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569231526] [2020-08-22 21:51:13,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:13,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 21:51:13,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145630957] [2020-08-22 21:51:13,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 21:51:13,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:13,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 21:51:13,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:13,060 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 14 states. [2020-08-22 21:51:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:13,516 INFO L93 Difference]: Finished difference Result 494 states and 610 transitions. [2020-08-22 21:51:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 21:51:13,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-08-22 21:51:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:13,519 INFO L225 Difference]: With dead ends: 494 [2020-08-22 21:51:13,520 INFO L226 Difference]: Without dead ends: 326 [2020-08-22 21:51:13,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-22 21:51:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 266. [2020-08-22 21:51:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 21:51:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-08-22 21:51:13,554 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-08-22 21:51:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:13,554 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-08-22 21:51:13,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 21:51:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-08-22 21:51:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 21:51:13,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:13,558 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:13,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 21:51:13,558 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:13,559 INFO L82 PathProgramCache]: Analyzing trace with hash 867387793, now seen corresponding path program 11 times [2020-08-22 21:51:13,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:13,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886882631] [2020-08-22 21:51:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 21:51:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 21:51:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 21:51:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 6 proven. 309 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:13,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886882631] [2020-08-22 21:51:13,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:13,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 21:51:13,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595625483] [2020-08-22 21:51:13,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 21:51:13,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 21:51:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:13,814 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 15 states. [2020-08-22 21:51:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:14,115 INFO L93 Difference]: Finished difference Result 591 states and 713 transitions. [2020-08-22 21:51:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 21:51:14,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-08-22 21:51:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:14,119 INFO L225 Difference]: With dead ends: 591 [2020-08-22 21:51:14,119 INFO L226 Difference]: Without dead ends: 416 [2020-08-22 21:51:14,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-22 21:51:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 276. [2020-08-22 21:51:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 21:51:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-08-22 21:51:14,152 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-08-22 21:51:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:14,153 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-08-22 21:51:14,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 21:51:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-08-22 21:51:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 21:51:14,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:14,155 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:14,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 21:51:14,156 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:14,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2130098883, now seen corresponding path program 10 times [2020-08-22 21:51:14,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:14,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142677255] [2020-08-22 21:51:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 21:51:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 21:51:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 21:51:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 7 proven. 289 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:14,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142677255] [2020-08-22 21:51:14,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:14,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 21:51:14,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072183909] [2020-08-22 21:51:14,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 21:51:14,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 21:51:14,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:14,515 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 15 states. [2020-08-22 21:51:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:14,975 INFO L93 Difference]: Finished difference Result 513 states and 635 transitions. [2020-08-22 21:51:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 21:51:14,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-08-22 21:51:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:14,978 INFO L225 Difference]: With dead ends: 513 [2020-08-22 21:51:14,978 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 21:51:14,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 21:51:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 276. [2020-08-22 21:51:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 21:51:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-08-22 21:51:15,014 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-08-22 21:51:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:15,015 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-08-22 21:51:15,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 21:51:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-08-22 21:51:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 21:51:15,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:15,020 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:15,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 21:51:15,025 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:15,026 INFO L82 PathProgramCache]: Analyzing trace with hash 890883481, now seen corresponding path program 12 times [2020-08-22 21:51:15,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:15,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276849002] [2020-08-22 21:51:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 21:51:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-22 21:51:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 21:51:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 6 proven. 366 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:15,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276849002] [2020-08-22 21:51:15,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:15,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 21:51:15,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153826096] [2020-08-22 21:51:15,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 21:51:15,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:15,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 21:51:15,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:15,332 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 16 states. [2020-08-22 21:51:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:15,742 INFO L93 Difference]: Finished difference Result 618 states and 746 transitions. [2020-08-22 21:51:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 21:51:15,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-08-22 21:51:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:15,747 INFO L225 Difference]: With dead ends: 618 [2020-08-22 21:51:15,747 INFO L226 Difference]: Without dead ends: 438 [2020-08-22 21:51:15,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-08-22 21:51:15,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2020-08-22 21:51:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 21:51:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-08-22 21:51:15,794 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-08-22 21:51:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:15,794 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-08-22 21:51:15,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 21:51:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-08-22 21:51:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 21:51:15,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:15,799 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:15,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 21:51:15,800 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:15,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2141372725, now seen corresponding path program 11 times [2020-08-22 21:51:15,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:15,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480707494] [2020-08-22 21:51:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 21:51:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-22 21:51:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 21:51:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 7 proven. 344 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:16,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480707494] [2020-08-22 21:51:16,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:16,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 21:51:16,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565904637] [2020-08-22 21:51:16,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 21:51:16,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:16,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 21:51:16,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:16,234 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 16 states. [2020-08-22 21:51:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:16,745 INFO L93 Difference]: Finished difference Result 532 states and 660 transitions. [2020-08-22 21:51:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 21:51:16,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-08-22 21:51:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:16,749 INFO L225 Difference]: With dead ends: 532 [2020-08-22 21:51:16,749 INFO L226 Difference]: Without dead ends: 354 [2020-08-22 21:51:16,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-22 21:51:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 286. [2020-08-22 21:51:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 21:51:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-08-22 21:51:16,781 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-08-22 21:51:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:16,782 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-08-22 21:51:16,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 21:51:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-08-22 21:51:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 21:51:16,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:16,784 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:16,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 21:51:16,785 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1892454033, now seen corresponding path program 13 times [2020-08-22 21:51:16,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:16,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001754376] [2020-08-22 21:51:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 21:51:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 21:51:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 21:51:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 6 proven. 428 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:17,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001754376] [2020-08-22 21:51:17,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:17,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 21:51:17,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469051645] [2020-08-22 21:51:17,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 21:51:17,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 21:51:17,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:17,098 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 17 states. [2020-08-22 21:51:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:17,428 INFO L93 Difference]: Finished difference Result 645 states and 779 transitions. [2020-08-22 21:51:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 21:51:17,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-08-22 21:51:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:17,432 INFO L225 Difference]: With dead ends: 645 [2020-08-22 21:51:17,432 INFO L226 Difference]: Without dead ends: 460 [2020-08-22 21:51:17,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-08-22 21:51:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 296. [2020-08-22 21:51:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 21:51:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-08-22 21:51:17,465 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-08-22 21:51:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:17,465 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-08-22 21:51:17,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 21:51:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-08-22 21:51:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 21:51:17,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:17,468 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:17,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 21:51:17,468 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:17,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1139802173, now seen corresponding path program 12 times [2020-08-22 21:51:17,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:17,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541593227] [2020-08-22 21:51:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 21:51:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 21:51:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 21:51:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 7 proven. 404 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:17,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541593227] [2020-08-22 21:51:17,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:17,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 21:51:17,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896039176] [2020-08-22 21:51:17,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 21:51:17,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:17,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 21:51:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:17,906 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 17 states. [2020-08-22 21:51:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:18,523 INFO L93 Difference]: Finished difference Result 551 states and 685 transitions. [2020-08-22 21:51:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 21:51:18,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-08-22 21:51:18,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:18,527 INFO L225 Difference]: With dead ends: 551 [2020-08-22 21:51:18,528 INFO L226 Difference]: Without dead ends: 368 [2020-08-22 21:51:18,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-22 21:51:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 296. [2020-08-22 21:51:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 21:51:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-08-22 21:51:18,575 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-08-22 21:51:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:18,576 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-08-22 21:51:18,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 21:51:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-08-22 21:51:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 21:51:18,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:18,579 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:18,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 21:51:18,579 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash -33314663, now seen corresponding path program 14 times [2020-08-22 21:51:18,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:18,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086186753] [2020-08-22 21:51:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-22 21:51:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 21:51:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 21:51:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 6 proven. 495 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:18,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086186753] [2020-08-22 21:51:18,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:18,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 21:51:18,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105846003] [2020-08-22 21:51:18,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 21:51:18,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:18,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 21:51:18,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:18,942 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 18 states. [2020-08-22 21:51:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:19,280 INFO L93 Difference]: Finished difference Result 672 states and 812 transitions. [2020-08-22 21:51:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 21:51:19,281 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-08-22 21:51:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:19,284 INFO L225 Difference]: With dead ends: 672 [2020-08-22 21:51:19,284 INFO L226 Difference]: Without dead ends: 482 [2020-08-22 21:51:19,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-08-22 21:51:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 306. [2020-08-22 21:51:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 21:51:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-08-22 21:51:19,323 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-08-22 21:51:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:19,324 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-08-22 21:51:19,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 21:51:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-08-22 21:51:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 21:51:19,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:19,327 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:19,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 21:51:19,328 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1229396427, now seen corresponding path program 13 times [2020-08-22 21:51:19,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:19,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196537323] [2020-08-22 21:51:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-22 21:51:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 21:51:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 21:51:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 7 proven. 469 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:19,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196537323] [2020-08-22 21:51:19,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:19,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 21:51:19,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524873523] [2020-08-22 21:51:19,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 21:51:19,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:19,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 21:51:19,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:19,754 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 18 states. [2020-08-22 21:51:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:20,362 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2020-08-22 21:51:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 21:51:20,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-08-22 21:51:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:20,365 INFO L225 Difference]: With dead ends: 570 [2020-08-22 21:51:20,366 INFO L226 Difference]: Without dead ends: 382 [2020-08-22 21:51:20,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-08-22 21:51:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 306. [2020-08-22 21:51:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 21:51:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-08-22 21:51:20,401 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-08-22 21:51:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:20,402 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-08-22 21:51:20,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 21:51:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-08-22 21:51:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-22 21:51:20,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:20,405 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:20,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 21:51:20,406 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2032954479, now seen corresponding path program 15 times [2020-08-22 21:51:20,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:20,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567736865] [2020-08-22 21:51:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 21:51:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 21:51:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-22 21:51:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-08-22 21:51:20,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567736865] [2020-08-22 21:51:20,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:20,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 21:51:20,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98713799] [2020-08-22 21:51:20,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 21:51:20,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:20,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 21:51:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 21:51:20,480 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 3 states. [2020-08-22 21:51:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:20,513 INFO L93 Difference]: Finished difference Result 321 states and 393 transitions. [2020-08-22 21:51:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 21:51:20,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2020-08-22 21:51:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:20,515 INFO L225 Difference]: With dead ends: 321 [2020-08-22 21:51:20,515 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 21:51:20,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 21:51:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 21:51:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2020-08-22 21:51:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-22 21:51:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2020-08-22 21:51:20,553 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 178 [2020-08-22 21:51:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:20,553 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2020-08-22 21:51:20,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 21:51:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2020-08-22 21:51:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 21:51:20,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:20,557 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:20,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 21:51:20,557 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:20,558 INFO L82 PathProgramCache]: Analyzing trace with hash 368593816, now seen corresponding path program 1 times [2020-08-22 21:51:20,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:20,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371631040] [2020-08-22 21:51:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 21:51:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 21:51:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 21:51:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-08-22 21:51:20,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371631040] [2020-08-22 21:51:20,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:20,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 21:51:20,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079488939] [2020-08-22 21:51:20,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:51:20,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:20,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:51:20,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:51:20,632 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand 4 states. [2020-08-22 21:51:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:20,673 INFO L93 Difference]: Finished difference Result 321 states and 392 transitions. [2020-08-22 21:51:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:51:20,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-08-22 21:51:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:20,678 INFO L225 Difference]: With dead ends: 321 [2020-08-22 21:51:20,678 INFO L226 Difference]: Without dead ends: 304 [2020-08-22 21:51:20,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-22 21:51:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-08-22 21:51:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 21:51:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2020-08-22 21:51:20,712 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 372 transitions. Word has length 180 [2020-08-22 21:51:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:20,712 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 372 transitions. [2020-08-22 21:51:20,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:51:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 372 transitions. [2020-08-22 21:51:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 21:51:20,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:20,715 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:20,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 21:51:20,716 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1683689272, now seen corresponding path program 1 times [2020-08-22 21:51:20,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:20,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446314813] [2020-08-22 21:51:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 21:51:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 21:51:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 21:51:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 6 proven. 567 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:21,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446314813] [2020-08-22 21:51:21,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:21,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 21:51:21,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128814958] [2020-08-22 21:51:21,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 21:51:21,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 21:51:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:21,092 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. Second operand 19 states. [2020-08-22 21:51:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:21,521 INFO L93 Difference]: Finished difference Result 695 states and 837 transitions. [2020-08-22 21:51:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 21:51:21,522 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-08-22 21:51:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:21,525 INFO L225 Difference]: With dead ends: 695 [2020-08-22 21:51:21,525 INFO L226 Difference]: Without dead ends: 502 [2020-08-22 21:51:21,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 21:51:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-08-22 21:51:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 314. [2020-08-22 21:51:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-22 21:51:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-08-22 21:51:21,566 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-08-22 21:51:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:21,567 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-08-22 21:51:21,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 21:51:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-08-22 21:51:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 21:51:21,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:21,569 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:21,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 21:51:21,569 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash -326698006, now seen corresponding path program 1 times [2020-08-22 21:51:21,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:21,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002043644] [2020-08-22 21:51:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 21:51:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 21:51:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 21:51:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 7 proven. 539 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:22,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002043644] [2020-08-22 21:51:22,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:22,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 21:51:22,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884839983] [2020-08-22 21:51:22,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 21:51:22,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:22,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 21:51:22,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:22,043 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 19 states. [2020-08-22 21:51:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:22,734 INFO L93 Difference]: Finished difference Result 585 states and 727 transitions. [2020-08-22 21:51:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 21:51:22,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-08-22 21:51:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:22,741 INFO L225 Difference]: With dead ends: 585 [2020-08-22 21:51:22,742 INFO L226 Difference]: Without dead ends: 394 [2020-08-22 21:51:22,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-22 21:51:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-22 21:51:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 314. [2020-08-22 21:51:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-22 21:51:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-08-22 21:51:22,778 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-08-22 21:51:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:22,778 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-08-22 21:51:22,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 21:51:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-08-22 21:51:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 21:51:22,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:22,781 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:22,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 21:51:22,782 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1714201280, now seen corresponding path program 2 times [2020-08-22 21:51:22,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:22,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782404841] [2020-08-22 21:51:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 21:51:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-22 21:51:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-22 21:51:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 6 proven. 644 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:23,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782404841] [2020-08-22 21:51:23,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:23,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 21:51:23,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718758101] [2020-08-22 21:51:23,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 21:51:23,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:23,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 21:51:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 21:51:23,198 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 20 states. [2020-08-22 21:51:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:23,542 INFO L93 Difference]: Finished difference Result 722 states and 870 transitions. [2020-08-22 21:51:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 21:51:23,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-08-22 21:51:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:23,546 INFO L225 Difference]: With dead ends: 722 [2020-08-22 21:51:23,546 INFO L226 Difference]: Without dead ends: 524 [2020-08-22 21:51:23,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-08-22 21:51:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 324. [2020-08-22 21:51:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 21:51:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-08-22 21:51:23,583 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-08-22 21:51:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:23,583 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-08-22 21:51:23,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 21:51:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-08-22 21:51:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 21:51:23,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:23,586 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:23,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 21:51:23,586 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash 570378738, now seen corresponding path program 2 times [2020-08-22 21:51:23,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:23,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746689591] [2020-08-22 21:51:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 21:51:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-22 21:51:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-22 21:51:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 7 proven. 614 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:24,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746689591] [2020-08-22 21:51:24,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:24,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 21:51:24,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258324507] [2020-08-22 21:51:24,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 21:51:24,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:24,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 21:51:24,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 21:51:24,106 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 20 states. [2020-08-22 21:51:24,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:24,974 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2020-08-22 21:51:24,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 21:51:24,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-08-22 21:51:24,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:24,977 INFO L225 Difference]: With dead ends: 604 [2020-08-22 21:51:24,977 INFO L226 Difference]: Without dead ends: 408 [2020-08-22 21:51:24,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-08-22 21:51:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 324. [2020-08-22 21:51:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 21:51:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-08-22 21:51:25,014 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-08-22 21:51:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:25,014 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-08-22 21:51:25,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 21:51:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-08-22 21:51:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 21:51:25,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:25,016 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:25,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 21:51:25,016 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash 922915896, now seen corresponding path program 3 times [2020-08-22 21:51:25,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:25,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295201576] [2020-08-22 21:51:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 21:51:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 21:51:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 21:51:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 6 proven. 726 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:25,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295201576] [2020-08-22 21:51:25,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:25,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 21:51:25,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932958386] [2020-08-22 21:51:25,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 21:51:25,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 21:51:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:25,434 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 21 states. [2020-08-22 21:51:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:25,842 INFO L93 Difference]: Finished difference Result 749 states and 903 transitions. [2020-08-22 21:51:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 21:51:25,845 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-08-22 21:51:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:25,848 INFO L225 Difference]: With dead ends: 749 [2020-08-22 21:51:25,849 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 21:51:25,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:51:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 21:51:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 334. [2020-08-22 21:51:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 21:51:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-08-22 21:51:25,890 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-08-22 21:51:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:25,890 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-08-22 21:51:25,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 21:51:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-08-22 21:51:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 21:51:25,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:25,893 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:25,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 21:51:25,893 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1087471382, now seen corresponding path program 3 times [2020-08-22 21:51:25,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:25,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298049498] [2020-08-22 21:51:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 21:51:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 21:51:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 21:51:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 7 proven. 694 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:26,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298049498] [2020-08-22 21:51:26,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:26,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 21:51:26,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127983281] [2020-08-22 21:51:26,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 21:51:26,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:26,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 21:51:26,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:26,462 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 21 states. [2020-08-22 21:51:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:27,375 INFO L93 Difference]: Finished difference Result 623 states and 777 transitions. [2020-08-22 21:51:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 21:51:27,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-08-22 21:51:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:27,377 INFO L225 Difference]: With dead ends: 623 [2020-08-22 21:51:27,377 INFO L226 Difference]: Without dead ends: 422 [2020-08-22 21:51:27,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:51:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-08-22 21:51:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 334. [2020-08-22 21:51:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 21:51:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-08-22 21:51:27,415 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-08-22 21:51:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:27,415 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-08-22 21:51:27,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 21:51:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-08-22 21:51:27,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 21:51:27,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:27,417 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:27,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 21:51:27,418 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:27,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:27,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1276573760, now seen corresponding path program 4 times [2020-08-22 21:51:27,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:27,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231322242] [2020-08-22 21:51:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 21:51:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-22 21:51:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 21:51:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 6 proven. 813 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:27,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231322242] [2020-08-22 21:51:27,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:27,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 21:51:27,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953885000] [2020-08-22 21:51:27,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 21:51:27,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:27,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 21:51:27,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:51:27,863 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 22 states. [2020-08-22 21:51:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:28,248 INFO L93 Difference]: Finished difference Result 776 states and 936 transitions. [2020-08-22 21:51:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 21:51:28,250 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-08-22 21:51:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:28,254 INFO L225 Difference]: With dead ends: 776 [2020-08-22 21:51:28,254 INFO L226 Difference]: Without dead ends: 568 [2020-08-22 21:51:28,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-08-22 21:51:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2020-08-22 21:51:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 21:51:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-08-22 21:51:28,295 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-08-22 21:51:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:28,299 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-08-22 21:51:28,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 21:51:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-08-22 21:51:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 21:51:28,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:28,301 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:28,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 21:51:28,302 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:28,302 INFO L82 PathProgramCache]: Analyzing trace with hash -733813518, now seen corresponding path program 4 times [2020-08-22 21:51:28,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:28,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493457220] [2020-08-22 21:51:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 21:51:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-22 21:51:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 21:51:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 7 proven. 779 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:28,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493457220] [2020-08-22 21:51:28,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:28,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 21:51:28,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398027824] [2020-08-22 21:51:28,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 21:51:28,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:28,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 21:51:28,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:51:28,892 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 22 states. [2020-08-22 21:51:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:29,827 INFO L93 Difference]: Finished difference Result 642 states and 802 transitions. [2020-08-22 21:51:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 21:51:29,830 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-08-22 21:51:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:29,831 INFO L225 Difference]: With dead ends: 642 [2020-08-22 21:51:29,831 INFO L226 Difference]: Without dead ends: 436 [2020-08-22 21:51:29,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-08-22 21:51:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 344. [2020-08-22 21:51:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 21:51:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-08-22 21:51:29,871 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-08-22 21:51:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:29,872 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-08-22 21:51:29,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 21:51:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-08-22 21:51:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 21:51:29,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:29,874 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:29,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 21:51:29,874 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash -171452104, now seen corresponding path program 5 times [2020-08-22 21:51:29,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:29,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610329596] [2020-08-22 21:51:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:29,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:29,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:29,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 21:51:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 21:51:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 21:51:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 944 backedges. 6 proven. 905 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:30,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610329596] [2020-08-22 21:51:30,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:30,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 21:51:30,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578616775] [2020-08-22 21:51:30,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 21:51:30,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:30,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 21:51:30,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:30,363 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 23 states. [2020-08-22 21:51:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:30,835 INFO L93 Difference]: Finished difference Result 803 states and 969 transitions. [2020-08-22 21:51:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 21:51:30,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-08-22 21:51:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:30,838 INFO L225 Difference]: With dead ends: 803 [2020-08-22 21:51:30,839 INFO L226 Difference]: Without dead ends: 590 [2020-08-22 21:51:30,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:51:30,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-08-22 21:51:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 354. [2020-08-22 21:51:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-08-22 21:51:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-08-22 21:51:30,885 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-08-22 21:51:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:30,886 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-08-22 21:51:30,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 21:51:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-08-22 21:51:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 21:51:30,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:30,888 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:30,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 21:51:30,888 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:30,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:30,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2113127914, now seen corresponding path program 5 times [2020-08-22 21:51:30,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:30,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576153025] [2020-08-22 21:51:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:31,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 21:51:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:31,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 21:51:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:31,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 21:51:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 7 proven. 869 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:31,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576153025] [2020-08-22 21:51:31,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:31,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 21:51:31,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301200603] [2020-08-22 21:51:31,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 21:51:31,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 21:51:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:31,506 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 23 states. [2020-08-22 21:51:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:32,604 INFO L93 Difference]: Finished difference Result 661 states and 827 transitions. [2020-08-22 21:51:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 21:51:32,605 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-08-22 21:51:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:32,608 INFO L225 Difference]: With dead ends: 661 [2020-08-22 21:51:32,609 INFO L226 Difference]: Without dead ends: 450 [2020-08-22 21:51:32,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:51:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-22 21:51:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 354. [2020-08-22 21:51:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-08-22 21:51:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-08-22 21:51:32,678 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-08-22 21:51:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:32,679 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-08-22 21:51:32,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 21:51:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-08-22 21:51:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 21:51:32,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:32,685 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:32,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 21:51:32,686 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1093348544, now seen corresponding path program 6 times [2020-08-22 21:51:32,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:32,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218273129] [2020-08-22 21:51:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:33,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-22 21:51:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:33,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 21:51:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:33,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 21:51:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 6 proven. 1002 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:33,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218273129] [2020-08-22 21:51:33,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:33,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 21:51:33,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176035637] [2020-08-22 21:51:33,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 21:51:33,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 21:51:33,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:51:33,338 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 24 states. [2020-08-22 21:51:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:34,109 INFO L93 Difference]: Finished difference Result 830 states and 1002 transitions. [2020-08-22 21:51:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 21:51:34,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-08-22 21:51:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:34,115 INFO L225 Difference]: With dead ends: 830 [2020-08-22 21:51:34,115 INFO L226 Difference]: Without dead ends: 612 [2020-08-22 21:51:34,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:51:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-08-22 21:51:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 364. [2020-08-22 21:51:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-08-22 21:51:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-08-22 21:51:34,191 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-08-22 21:51:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:34,194 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-08-22 21:51:34,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 21:51:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-08-22 21:51:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 21:51:34,202 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:34,203 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:34,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 21:51:34,203 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1191231474, now seen corresponding path program 6 times [2020-08-22 21:51:34,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:34,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845827654] [2020-08-22 21:51:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:34,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:34,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:34,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-22 21:51:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 21:51:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 21:51:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 7 proven. 964 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:35,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845827654] [2020-08-22 21:51:35,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:35,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 21:51:35,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482080127] [2020-08-22 21:51:35,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 21:51:35,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:35,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 21:51:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:51:35,121 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 24 states. [2020-08-22 21:51:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:36,160 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2020-08-22 21:51:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 21:51:36,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-08-22 21:51:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:36,163 INFO L225 Difference]: With dead ends: 680 [2020-08-22 21:51:36,164 INFO L226 Difference]: Without dead ends: 464 [2020-08-22 21:51:36,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:51:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-08-22 21:51:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 364. [2020-08-22 21:51:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-08-22 21:51:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-08-22 21:51:36,209 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-08-22 21:51:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:36,209 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-08-22 21:51:36,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 21:51:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-08-22 21:51:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 21:51:36,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:36,212 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:36,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 21:51:36,212 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1719328312, now seen corresponding path program 7 times [2020-08-22 21:51:36,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:36,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089297336] [2020-08-22 21:51:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 21:51:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 21:51:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 21:51:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 6 proven. 1104 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:36,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089297336] [2020-08-22 21:51:36,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:36,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 21:51:36,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023464387] [2020-08-22 21:51:36,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 21:51:36,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:36,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 21:51:36,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:51:36,752 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 25 states. [2020-08-22 21:51:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:37,197 INFO L93 Difference]: Finished difference Result 857 states and 1035 transitions. [2020-08-22 21:51:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:51:37,198 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-08-22 21:51:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:37,201 INFO L225 Difference]: With dead ends: 857 [2020-08-22 21:51:37,201 INFO L226 Difference]: Without dead ends: 634 [2020-08-22 21:51:37,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:51:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-08-22 21:51:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 374. [2020-08-22 21:51:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-08-22 21:51:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-08-22 21:51:37,249 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-08-22 21:51:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:37,250 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-08-22 21:51:37,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 21:51:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-08-22 21:51:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 21:51:37,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:37,252 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:37,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 21:51:37,253 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash -291058966, now seen corresponding path program 7 times [2020-08-22 21:51:37,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:37,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341842332] [2020-08-22 21:51:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 21:51:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 21:51:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 21:51:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 7 proven. 1064 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:37,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341842332] [2020-08-22 21:51:37,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:37,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 21:51:37,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220525903] [2020-08-22 21:51:37,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 21:51:37,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:37,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 21:51:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:51:37,965 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 25 states. [2020-08-22 21:51:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:39,120 INFO L93 Difference]: Finished difference Result 699 states and 877 transitions. [2020-08-22 21:51:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:51:39,121 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-08-22 21:51:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:39,123 INFO L225 Difference]: With dead ends: 699 [2020-08-22 21:51:39,123 INFO L226 Difference]: Without dead ends: 478 [2020-08-22 21:51:39,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:51:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-08-22 21:51:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 374. [2020-08-22 21:51:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-08-22 21:51:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-08-22 21:51:39,170 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-08-22 21:51:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:39,171 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-08-22 21:51:39,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 21:51:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-08-22 21:51:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 21:51:39,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:39,173 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:39,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 21:51:39,174 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1312616000, now seen corresponding path program 8 times [2020-08-22 21:51:39,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:39,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9086333] [2020-08-22 21:51:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-22 21:51:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-22 21:51:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 21:51:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 6 proven. 1211 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:39,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9086333] [2020-08-22 21:51:39,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:39,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 21:51:39,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327143431] [2020-08-22 21:51:39,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 21:51:39,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:39,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 21:51:39,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:51:39,740 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 26 states. [2020-08-22 21:51:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:40,220 INFO L93 Difference]: Finished difference Result 884 states and 1068 transitions. [2020-08-22 21:51:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 21:51:40,221 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-08-22 21:51:40,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:40,224 INFO L225 Difference]: With dead ends: 884 [2020-08-22 21:51:40,224 INFO L226 Difference]: Without dead ends: 656 [2020-08-22 21:51:40,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:51:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-22 21:51:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 384. [2020-08-22 21:51:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 21:51:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-08-22 21:51:40,278 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-08-22 21:51:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:40,278 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-08-22 21:51:40,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 21:51:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-08-22 21:51:40,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 21:51:40,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:40,281 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:40,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 21:51:40,281 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash -697771278, now seen corresponding path program 8 times [2020-08-22 21:51:40,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:40,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884952338] [2020-08-22 21:51:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-22 21:51:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-22 21:51:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 21:51:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 7 proven. 1169 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:41,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884952338] [2020-08-22 21:51:41,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:41,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 21:51:41,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630123879] [2020-08-22 21:51:41,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 21:51:41,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 21:51:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:51:41,044 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 26 states. [2020-08-22 21:51:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:42,403 INFO L93 Difference]: Finished difference Result 718 states and 902 transitions. [2020-08-22 21:51:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 21:51:42,404 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-08-22 21:51:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:42,406 INFO L225 Difference]: With dead ends: 718 [2020-08-22 21:51:42,406 INFO L226 Difference]: Without dead ends: 492 [2020-08-22 21:51:42,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:51:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-22 21:51:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 384. [2020-08-22 21:51:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 21:51:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-08-22 21:51:42,457 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-08-22 21:51:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:42,457 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-08-22 21:51:42,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 21:51:42,458 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-08-22 21:51:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-22 21:51:42,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:42,459 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:42,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 21:51:42,459 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1256956728, now seen corresponding path program 9 times [2020-08-22 21:51:42,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:42,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601330944] [2020-08-22 21:51:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:43,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 21:51:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:43,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 21:51:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:43,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 21:51:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 6 proven. 1323 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:43,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601330944] [2020-08-22 21:51:43,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:43,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 21:51:43,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500442884] [2020-08-22 21:51:43,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 21:51:43,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:43,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 21:51:43,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:51:43,076 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 27 states. [2020-08-22 21:51:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:43,679 INFO L93 Difference]: Finished difference Result 911 states and 1101 transitions. [2020-08-22 21:51:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 21:51:43,680 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-08-22 21:51:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:43,683 INFO L225 Difference]: With dead ends: 911 [2020-08-22 21:51:43,683 INFO L226 Difference]: Without dead ends: 678 [2020-08-22 21:51:43,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:51:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-08-22 21:51:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 394. [2020-08-22 21:51:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 21:51:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-08-22 21:51:43,727 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-08-22 21:51:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:43,727 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-08-22 21:51:43,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 21:51:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-08-22 21:51:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-22 21:51:43,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:43,729 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:43,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 21:51:43,729 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:43,730 INFO L82 PathProgramCache]: Analyzing trace with hash -753430550, now seen corresponding path program 9 times [2020-08-22 21:51:43,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:43,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924802061] [2020-08-22 21:51:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:43,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:43,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:43,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 21:51:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 21:51:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 21:51:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 7 proven. 1279 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:44,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924802061] [2020-08-22 21:51:44,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:44,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 21:51:44,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253163356] [2020-08-22 21:51:44,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 21:51:44,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:44,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 21:51:44,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:51:44,589 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 27 states. [2020-08-22 21:51:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:46,097 INFO L93 Difference]: Finished difference Result 737 states and 927 transitions. [2020-08-22 21:51:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 21:51:46,097 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-08-22 21:51:46,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:46,100 INFO L225 Difference]: With dead ends: 737 [2020-08-22 21:51:46,100 INFO L226 Difference]: Without dead ends: 506 [2020-08-22 21:51:46,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:51:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-22 21:51:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 394. [2020-08-22 21:51:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 21:51:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-08-22 21:51:46,141 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-08-22 21:51:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:46,142 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-08-22 21:51:46,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 21:51:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-08-22 21:51:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-22 21:51:46,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:46,144 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:46,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 21:51:46,144 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:46,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:46,144 INFO L82 PathProgramCache]: Analyzing trace with hash -629192384, now seen corresponding path program 10 times [2020-08-22 21:51:46,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:46,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37377494] [2020-08-22 21:51:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 6 proven. 1440 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:46,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37377494] [2020-08-22 21:51:46,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:46,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 21:51:46,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571138383] [2020-08-22 21:51:46,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 21:51:46,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 21:51:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:51:46,849 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 28 states. [2020-08-22 21:51:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:47,511 INFO L93 Difference]: Finished difference Result 938 states and 1134 transitions. [2020-08-22 21:51:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:51:47,512 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 225 [2020-08-22 21:51:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:47,516 INFO L225 Difference]: With dead ends: 938 [2020-08-22 21:51:47,516 INFO L226 Difference]: Without dead ends: 700 [2020-08-22 21:51:47,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2020-08-22 21:51:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-08-22 21:51:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 404. [2020-08-22 21:51:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-08-22 21:51:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 502 transitions. [2020-08-22 21:51:47,574 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 502 transitions. Word has length 225 [2020-08-22 21:51:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:47,574 INFO L479 AbstractCegarLoop]: Abstraction has 404 states and 502 transitions. [2020-08-22 21:51:47,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 21:51:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 502 transitions. [2020-08-22 21:51:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-22 21:51:47,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:47,576 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:47,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 21:51:47,577 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1655387634, now seen corresponding path program 10 times [2020-08-22 21:51:47,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:47,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165232566] [2020-08-22 21:51:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:47,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:47,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:47,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:47,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:47,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-08-22 21:51:47,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165232566] [2020-08-22 21:51:47,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:47,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:47,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684492735] [2020-08-22 21:51:47,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:47,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:47,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:47,895 INFO L87 Difference]: Start difference. First operand 404 states and 502 transitions. Second operand 10 states. [2020-08-22 21:51:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:48,223 INFO L93 Difference]: Finished difference Result 459 states and 581 transitions. [2020-08-22 21:51:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:48,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 225 [2020-08-22 21:51:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:48,228 INFO L225 Difference]: With dead ends: 459 [2020-08-22 21:51:48,228 INFO L226 Difference]: Without dead ends: 453 [2020-08-22 21:51:48,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-08-22 21:51:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2020-08-22 21:51:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-08-22 21:51:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2020-08-22 21:51:48,323 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 225 [2020-08-22 21:51:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:48,325 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2020-08-22 21:51:48,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2020-08-22 21:51:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-22 21:51:48,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:48,329 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:48,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 21:51:48,329 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash -131719239, now seen corresponding path program 1 times [2020-08-22 21:51:48,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:48,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142694164] [2020-08-22 21:51:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-08-22 21:51:48,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142694164] [2020-08-22 21:51:48,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:48,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 21:51:48,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716751266] [2020-08-22 21:51:48,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 21:51:48,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 21:51:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:48,661 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand 12 states. [2020-08-22 21:51:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:48,977 INFO L93 Difference]: Finished difference Result 459 states and 579 transitions. [2020-08-22 21:51:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:48,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 227 [2020-08-22 21:51:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:48,980 INFO L225 Difference]: With dead ends: 459 [2020-08-22 21:51:48,981 INFO L226 Difference]: Without dead ends: 452 [2020-08-22 21:51:48,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-22 21:51:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-08-22 21:51:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-08-22 21:51:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 549 transitions. [2020-08-22 21:51:49,076 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 549 transitions. Word has length 227 [2020-08-22 21:51:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:49,076 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 549 transitions. [2020-08-22 21:51:49,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 21:51:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 549 transitions. [2020-08-22 21:51:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-22 21:51:49,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:49,079 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:49,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 21:51:49,079 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:49,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:49,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1678288039, now seen corresponding path program 1 times [2020-08-22 21:51:49,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:49,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328390956] [2020-08-22 21:51:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2020-08-22 21:51:49,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328390956] [2020-08-22 21:51:49,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:49,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 21:51:49,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207743202] [2020-08-22 21:51:49,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 21:51:49,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 21:51:49,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:49,245 INFO L87 Difference]: Start difference. First operand 438 states and 549 transitions. Second operand 6 states. [2020-08-22 21:51:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:49,354 INFO L93 Difference]: Finished difference Result 444 states and 554 transitions. [2020-08-22 21:51:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 21:51:49,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 227 [2020-08-22 21:51:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:49,357 INFO L225 Difference]: With dead ends: 444 [2020-08-22 21:51:49,357 INFO L226 Difference]: Without dead ends: 432 [2020-08-22 21:51:49,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-08-22 21:51:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2020-08-22 21:51:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-08-22 21:51:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 541 transitions. [2020-08-22 21:51:49,442 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 541 transitions. Word has length 227 [2020-08-22 21:51:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:49,442 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 541 transitions. [2020-08-22 21:51:49,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 21:51:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 541 transitions. [2020-08-22 21:51:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-22 21:51:49,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:49,445 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:49,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 21:51:49,445 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:49,446 INFO L82 PathProgramCache]: Analyzing trace with hash 947853182, now seen corresponding path program 1 times [2020-08-22 21:51:49,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:49,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937322405] [2020-08-22 21:51:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 21:51:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 21:51:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 21:51:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 21:51:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2020-08-22 21:51:49,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937322405] [2020-08-22 21:51:49,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:49,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 21:51:49,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949888664] [2020-08-22 21:51:49,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 21:51:49,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 21:51:49,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:49,639 INFO L87 Difference]: Start difference. First operand 432 states and 541 transitions. Second operand 5 states. [2020-08-22 21:51:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:49,795 INFO L93 Difference]: Finished difference Result 691 states and 868 transitions. [2020-08-22 21:51:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 21:51:49,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2020-08-22 21:51:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:49,798 INFO L225 Difference]: With dead ends: 691 [2020-08-22 21:51:49,798 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 21:51:49,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 21:51:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 263. [2020-08-22 21:51:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-08-22 21:51:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 327 transitions. [2020-08-22 21:51:49,839 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 327 transitions. Word has length 230 [2020-08-22 21:51:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:49,839 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 327 transitions. [2020-08-22 21:51:49,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 21:51:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 327 transitions. [2020-08-22 21:51:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-08-22 21:51:49,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:49,841 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:49,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 21:51:49,841 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:49,842 INFO L82 PathProgramCache]: Analyzing trace with hash -671277925, now seen corresponding path program 1 times [2020-08-22 21:51:49,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:49,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731393821] [2020-08-22 21:51:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-08-22 21:51:50,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731393821] [2020-08-22 21:51:50,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:50,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 21:51:50,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628703077] [2020-08-22 21:51:50,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:51:50,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:50,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:51:50,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:50,055 INFO L87 Difference]: Start difference. First operand 263 states and 327 transitions. Second operand 8 states. [2020-08-22 21:51:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:50,191 INFO L93 Difference]: Finished difference Result 317 states and 389 transitions. [2020-08-22 21:51:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 21:51:50,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 236 [2020-08-22 21:51:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:50,193 INFO L225 Difference]: With dead ends: 317 [2020-08-22 21:51:50,193 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 21:51:50,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 21:51:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 269. [2020-08-22 21:51:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-08-22 21:51:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-08-22 21:51:50,245 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 236 [2020-08-22 21:51:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:50,246 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-08-22 21:51:50,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:51:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-08-22 21:51:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-08-22 21:51:50,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:50,248 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:50,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 21:51:50,248 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:50,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:50,248 INFO L82 PathProgramCache]: Analyzing trace with hash 287100319, now seen corresponding path program 1 times [2020-08-22 21:51:50,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:50,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315677114] [2020-08-22 21:51:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-22 21:51:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2020-08-22 21:51:50,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315677114] [2020-08-22 21:51:50,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:50,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 21:51:50,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427304346] [2020-08-22 21:51:50,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 21:51:50,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:50,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 21:51:50,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:50,616 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 13 states. [2020-08-22 21:51:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:50,975 INFO L93 Difference]: Finished difference Result 346 states and 421 transitions. [2020-08-22 21:51:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 21:51:50,976 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 240 [2020-08-22 21:51:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:50,978 INFO L225 Difference]: With dead ends: 346 [2020-08-22 21:51:50,978 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 21:51:50,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 21:51:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 308. [2020-08-22 21:51:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-08-22 21:51:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 379 transitions. [2020-08-22 21:51:51,048 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 379 transitions. Word has length 240 [2020-08-22 21:51:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:51,050 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 379 transitions. [2020-08-22 21:51:51,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 21:51:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 379 transitions. [2020-08-22 21:51:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-08-22 21:51:51,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:51,053 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:51,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 21:51:51,053 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:51,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1150729662, now seen corresponding path program 1 times [2020-08-22 21:51:51,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:51,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229547034] [2020-08-22 21:51:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-22 21:51:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-08-22 21:51:51,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229547034] [2020-08-22 21:51:51,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:51,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:51,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825353258] [2020-08-22 21:51:51,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:51,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:51,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:51,342 INFO L87 Difference]: Start difference. First operand 308 states and 379 transitions. Second operand 10 states. [2020-08-22 21:51:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:51,626 INFO L93 Difference]: Finished difference Result 320 states and 390 transitions. [2020-08-22 21:51:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:51,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 243 [2020-08-22 21:51:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:51,629 INFO L225 Difference]: With dead ends: 320 [2020-08-22 21:51:51,629 INFO L226 Difference]: Without dead ends: 294 [2020-08-22 21:51:51,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-08-22 21:51:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 265. [2020-08-22 21:51:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 21:51:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 302 transitions. [2020-08-22 21:51:51,686 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 302 transitions. Word has length 243 [2020-08-22 21:51:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:51,686 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 302 transitions. [2020-08-22 21:51:51,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 302 transitions. [2020-08-22 21:51:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-08-22 21:51:51,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:51,688 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:51,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 21:51:51,689 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 661117091, now seen corresponding path program 2 times [2020-08-22 21:51:51,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:51,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312544033] [2020-08-22 21:51:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-22 21:51:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-08-22 21:51:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1420 trivial. 0 not checked. [2020-08-22 21:51:52,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312544033] [2020-08-22 21:51:52,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:52,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 21:51:52,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108814825] [2020-08-22 21:51:52,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 21:51:52,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:52,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 21:51:52,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:52,002 INFO L87 Difference]: Start difference. First operand 265 states and 302 transitions. Second operand 11 states. [2020-08-22 21:51:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:52,257 INFO L93 Difference]: Finished difference Result 333 states and 378 transitions. [2020-08-22 21:51:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:52,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 244 [2020-08-22 21:51:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:52,260 INFO L225 Difference]: With dead ends: 333 [2020-08-22 21:51:52,260 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 21:51:52,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 21:51:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-08-22 21:51:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-22 21:51:52,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 305 transitions. [2020-08-22 21:51:52,314 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 305 transitions. Word has length 244 [2020-08-22 21:51:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:52,314 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 305 transitions. [2020-08-22 21:51:52,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 21:51:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 305 transitions. [2020-08-22 21:51:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-08-22 21:51:52,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:52,316 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:52,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 21:51:52,316 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash -229943887, now seen corresponding path program 1 times [2020-08-22 21:51:52,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:52,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449379945] [2020-08-22 21:51:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 21:51:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 21:51:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-08-22 21:51:52,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449379945] [2020-08-22 21:51:52,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:52,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 21:51:52,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028870423] [2020-08-22 21:51:52,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 21:51:52,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:52,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 21:51:52,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:52,752 INFO L87 Difference]: Start difference. First operand 268 states and 305 transitions. Second operand 14 states. [2020-08-22 21:51:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:53,209 INFO L93 Difference]: Finished difference Result 324 states and 366 transitions. [2020-08-22 21:51:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 21:51:53,210 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 245 [2020-08-22 21:51:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:53,212 INFO L225 Difference]: With dead ends: 324 [2020-08-22 21:51:53,212 INFO L226 Difference]: Without dead ends: 312 [2020-08-22 21:51:53,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-08-22 21:51:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2020-08-22 21:51:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 21:51:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 346 transitions. [2020-08-22 21:51:53,273 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 346 transitions. Word has length 245 [2020-08-22 21:51:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:53,275 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 346 transitions. [2020-08-22 21:51:53,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 21:51:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 346 transitions. [2020-08-22 21:51:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-08-22 21:51:53,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:53,277 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:53,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 21:51:53,277 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash 818281555, now seen corresponding path program 1 times [2020-08-22 21:51:53,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:53,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817064057] [2020-08-22 21:51:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 21:51:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-22 21:51:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2020-08-22 21:51:53,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817064057] [2020-08-22 21:51:53,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:53,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 21:51:53,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542466368] [2020-08-22 21:51:53,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 21:51:53,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:53,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 21:51:53,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:53,772 INFO L87 Difference]: Start difference. First operand 304 states and 346 transitions. Second operand 11 states. [2020-08-22 21:51:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:54,066 INFO L93 Difference]: Finished difference Result 316 states and 357 transitions. [2020-08-22 21:51:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 21:51:54,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 246 [2020-08-22 21:51:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:54,068 INFO L225 Difference]: With dead ends: 316 [2020-08-22 21:51:54,068 INFO L226 Difference]: Without dead ends: 275 [2020-08-22 21:51:54,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-08-22 21:51:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2020-08-22 21:51:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-22 21:51:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 304 transitions. [2020-08-22 21:51:54,118 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 304 transitions. Word has length 246 [2020-08-22 21:51:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:54,119 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 304 transitions. [2020-08-22 21:51:54,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 21:51:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 304 transitions. [2020-08-22 21:51:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-08-22 21:51:54,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:54,121 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:54,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 21:51:54,121 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:54,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:54,122 INFO L82 PathProgramCache]: Analyzing trace with hash -360487828, now seen corresponding path program 1 times [2020-08-22 21:51:54,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:54,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802961696] [2020-08-22 21:51:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 21:51:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 21:51:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1427 trivial. 0 not checked. [2020-08-22 21:51:54,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802961696] [2020-08-22 21:51:54,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:54,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 21:51:54,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641383298] [2020-08-22 21:51:54,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 21:51:54,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:54,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 21:51:54,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:54,515 INFO L87 Difference]: Start difference. First operand 268 states and 304 transitions. Second operand 12 states. [2020-08-22 21:51:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:54,891 INFO L93 Difference]: Finished difference Result 268 states and 304 transitions. [2020-08-22 21:51:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 21:51:54,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 248 [2020-08-22 21:51:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:54,899 INFO L225 Difference]: With dead ends: 268 [2020-08-22 21:51:54,899 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 21:51:54,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:54,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 21:51:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 21:51:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 21:51:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 21:51:54,903 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 248 [2020-08-22 21:51:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:54,903 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 21:51:54,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 21:51:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 21:51:54,904 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 21:51:54,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 21:51:54,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 21:51:55,726 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 21:51:58,978 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 492 DAG size of output: 4 [2020-08-22 21:52:03,183 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 561 DAG size of output: 4 [2020-08-22 21:52:03,742 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 4 [2020-08-22 21:52:04,078 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 4 [2020-08-22 21:52:05,709 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 427 DAG size of output: 4 [2020-08-22 21:52:06,615 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 4 [2020-08-22 21:52:09,533 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 526 DAG size of output: 4 [2020-08-22 21:52:09,739 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 4 [2020-08-22 21:52:13,206 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 592 DAG size of output: 4 [2020-08-22 21:52:13,562 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 21:52:15,322 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 459 DAG size of output: 4 [2020-08-22 21:52:15,990 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 4 [2020-08-22 21:52:16,401 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 4 [2020-08-22 21:52:16,608 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 4 [2020-08-22 21:52:20,005 WARN L193 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 592 DAG size of output: 4 [2020-08-22 21:52:20,370 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 137 [2020-08-22 21:52:21,743 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 396 DAG size of output: 4 [2020-08-22 21:52:22,723 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 4 [2020-08-22 21:52:22,835 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 4 [2020-08-22 21:52:26,851 WARN L193 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 601 DAG size of output: 8 [2020-08-22 21:52:27,163 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 21:52:27,463 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 21:52:27,945 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 21:52:30,549 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 499 DAG size of output: 4 [2020-08-22 21:52:34,547 WARN L193 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 568 DAG size of output: 4 [2020-08-22 21:52:35,191 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 4 [2020-08-22 21:52:35,571 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 4 [2020-08-22 21:52:37,654 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 434 DAG size of output: 4 [2020-08-22 21:52:38,669 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 344 DAG size of output: 4 [2020-08-22 21:52:41,789 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 533 DAG size of output: 4 [2020-08-22 21:52:42,016 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 4 [2020-08-22 21:52:48,064 WARN L193 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 571 DAG size of output: 4 [2020-08-22 21:52:48,372 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 21:52:50,643 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 466 DAG size of output: 4 [2020-08-22 21:52:51,416 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 4 [2020-08-22 21:52:51,890 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 4 [2020-08-22 21:52:52,165 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 4 [2020-08-22 21:52:58,152 WARN L193 SmtUtils]: Spent 5.98 s on a formula simplification. DAG size of input: 571 DAG size of output: 4 [2020-08-22 21:52:59,871 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 403 DAG size of output: 4 [2020-08-22 21:53:01,091 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 373 DAG size of output: 4 [2020-08-22 21:53:01,240 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 4 [2020-08-22 21:53:06,952 WARN L193 SmtUtils]: Spent 5.71 s on a formula simplification. DAG size of input: 578 DAG size of output: 8 [2020-08-22 21:53:07,266 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 21:53:07,574 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 21:53:08,031 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:08,253 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 4 [2020-08-22 21:53:08,554 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 4 [2020-08-22 21:53:08,658 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 4 [2020-08-22 21:53:08,980 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 4 [2020-08-22 21:53:09,117 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 4 [2020-08-22 21:53:09,384 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 4 [2020-08-22 21:53:09,754 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 4 [2020-08-22 21:53:09,929 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:10,165 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 4 [2020-08-22 21:53:10,280 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 4 [2020-08-22 21:53:10,747 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 4 [2020-08-22 21:53:10,925 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:11,132 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 4 [2020-08-22 21:53:11,276 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 4 [2020-08-22 21:53:11,634 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 4 [2020-08-22 21:53:11,816 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:11,996 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:13,274 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 4 [2020-08-22 21:53:30,029 WARN L193 SmtUtils]: Spent 16.48 s on a formula simplification. DAG size of input: 1153 DAG size of output: 991 [2020-08-22 21:53:47,798 WARN L193 SmtUtils]: Spent 17.76 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 21:54:16,230 WARN L193 SmtUtils]: Spent 28.43 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 21:54:19,445 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 21:54:21,348 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 21:54:21,696 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-08-22 21:54:31,996 WARN L193 SmtUtils]: Spent 10.29 s on a formula simplification. DAG size of input: 829 DAG size of output: 9 [2020-08-22 21:54:37,714 WARN L193 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 653 DAG size of output: 9 [2020-08-22 21:54:59,151 WARN L193 SmtUtils]: Spent 21.43 s on a formula simplification. DAG size of input: 1024 DAG size of output: 9 [2020-08-22 21:55:00,133 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 9 [2020-08-22 21:55:00,311 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-08-22 21:55:32,158 WARN L193 SmtUtils]: Spent 31.84 s on a formula simplification. DAG size of input: 1135 DAG size of output: 9 [2020-08-22 21:55:48,530 WARN L193 SmtUtils]: Spent 16.37 s on a formula simplification. DAG size of input: 1153 DAG size of output: 991 [2020-08-22 21:56:02,014 WARN L193 SmtUtils]: Spent 13.47 s on a formula simplification. DAG size of input: 892 DAG size of output: 9 [2020-08-22 21:56:06,459 WARN L193 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 598 DAG size of output: 9 [2020-08-22 21:56:08,851 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 494 DAG size of output: 9 [2020-08-22 21:56:10,217 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 398 DAG size of output: 9 [2020-08-22 21:56:42,549 WARN L193 SmtUtils]: Spent 32.33 s on a formula simplification. DAG size of input: 1135 DAG size of output: 9 [2020-08-22 21:57:01,967 WARN L193 SmtUtils]: Spent 19.41 s on a formula simplification. DAG size of input: 1495 DAG size of output: 9 [2020-08-22 21:57:02,444 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-08-22 21:57:10,955 WARN L193 SmtUtils]: Spent 8.51 s on a formula simplification. DAG size of input: 768 DAG size of output: 9 [2020-08-22 21:57:17,933 WARN L193 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 709 DAG size of output: 9 [2020-08-22 21:57:18,617 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 9 [2020-08-22 21:57:49,858 WARN L193 SmtUtils]: Spent 31.24 s on a formula simplification. DAG size of input: 1153 DAG size of output: 11 [2020-08-22 21:58:07,183 WARN L193 SmtUtils]: Spent 17.32 s on a formula simplification. DAG size of input: 1151 DAG size of output: 989 [2020-08-22 21:58:24,465 WARN L193 SmtUtils]: Spent 17.27 s on a formula simplification. DAG size of input: 1153 DAG size of output: 991 [2020-08-22 21:58:24,586 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-08-22 21:58:42,893 WARN L193 SmtUtils]: Spent 17.41 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997 [2020-08-22 21:59:01,669 WARN L193 SmtUtils]: Spent 18.77 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 21:59:31,476 WARN L193 SmtUtils]: Spent 29.80 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 21:59:34,873 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 21:59:36,828 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 21:59:37,198 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-08-22 21:59:48,080 WARN L193 SmtUtils]: Spent 10.87 s on a formula simplification. DAG size of input: 829 DAG size of output: 9 [2020-08-22 21:59:54,172 WARN L193 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 653 DAG size of output: 9 [2020-08-22 22:00:17,538 WARN L193 SmtUtils]: Spent 23.36 s on a formula simplification. DAG size of input: 1024 DAG size of output: 9 [2020-08-22 22:00:18,574 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 353 DAG size of output: 9 [2020-08-22 22:00:18,759 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-08-22 22:00:53,239 WARN L193 SmtUtils]: Spent 34.48 s on a formula simplification. DAG size of input: 1138 DAG size of output: 9 [2020-08-22 22:01:11,651 WARN L193 SmtUtils]: Spent 18.41 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997 [2020-08-22 22:01:27,790 WARN L193 SmtUtils]: Spent 16.12 s on a formula simplification. DAG size of input: 892 DAG size of output: 9 [2020-08-22 22:01:32,809 WARN L193 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 598 DAG size of output: 9 [2020-08-22 22:01:35,340 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 494 DAG size of output: 9 [2020-08-22 22:01:36,766 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 398 DAG size of output: 9 [2020-08-22 22:02:10,125 WARN L193 SmtUtils]: Spent 33.35 s on a formula simplification. DAG size of input: 1138 DAG size of output: 9 [2020-08-22 22:02:31,700 WARN L193 SmtUtils]: Spent 21.57 s on a formula simplification. DAG size of input: 1498 DAG size of output: 9 [2020-08-22 22:02:32,202 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-08-22 22:02:41,642 WARN L193 SmtUtils]: Spent 9.44 s on a formula simplification. DAG size of input: 768 DAG size of output: 9 [2020-08-22 22:02:49,071 WARN L193 SmtUtils]: Spent 7.43 s on a formula simplification. DAG size of input: 709 DAG size of output: 9 [2020-08-22 22:02:49,830 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 9 [2020-08-22 22:03:24,530 WARN L193 SmtUtils]: Spent 34.70 s on a formula simplification. DAG size of input: 1158 DAG size of output: 11 [2020-08-22 22:03:43,533 WARN L193 SmtUtils]: Spent 18.99 s on a formula simplification. DAG size of input: 1156 DAG size of output: 995 [2020-08-22 22:04:03,284 WARN L193 SmtUtils]: Spent 19.74 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997 [2020-08-22 22:04:03,410 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-08-22 22:04:03,676 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:04:05,749 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 445 DAG size of output: 4 [2020-08-22 22:04:09,119 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 510 DAG size of output: 4 [2020-08-22 22:04:09,559 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 4 [2020-08-22 22:04:09,805 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 4 [2020-08-22 22:04:11,423 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 384 DAG size of output: 4 [2020-08-22 22:04:12,153 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 4 [2020-08-22 22:04:14,944 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 477 DAG size of output: 4 [2020-08-22 22:04:15,077 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 4 [2020-08-22 22:04:17,962 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 22:04:18,113 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:04:19,684 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 414 DAG size of output: 4 [2020-08-22 22:04:20,277 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 4 [2020-08-22 22:04:20,623 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 4 [2020-08-22 22:04:20,788 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 4 [2020-08-22 22:04:23,593 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 22:04:24,447 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 8 [2020-08-22 22:04:25,788 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 355 DAG size of output: 4 [2020-08-22 22:04:26,765 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 4 [2020-08-22 22:04:30,279 WARN L193 SmtUtils]: Spent 3.43 s on a formula simplification. DAG size of input: 546 DAG size of output: 8 [2020-08-22 22:04:30,435 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:04:30,586 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:04:31,223 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:04:33,363 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 445 DAG size of output: 4 [2020-08-22 22:04:36,826 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 510 DAG size of output: 4 [2020-08-22 22:04:37,277 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 4 [2020-08-22 22:04:37,591 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 4 [2020-08-22 22:04:39,214 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 384 DAG size of output: 4 [2020-08-22 22:04:39,963 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 4 [2020-08-22 22:04:42,715 WARN L193 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 477 DAG size of output: 4 [2020-08-22 22:04:42,847 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 4 [2020-08-22 22:04:45,656 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 22:04:45,801 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:04:47,413 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 414 DAG size of output: 4 [2020-08-22 22:04:48,007 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 4 [2020-08-22 22:04:48,354 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 4 [2020-08-22 22:04:48,518 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 4 [2020-08-22 22:04:51,374 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 22:04:52,254 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 8 [2020-08-22 22:04:53,617 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 355 DAG size of output: 4 [2020-08-22 22:04:54,593 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 4 [2020-08-22 22:04:58,125 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 546 DAG size of output: 8 [2020-08-22 22:04:58,279 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:04:58,429 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4