/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:24:46,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:24:46,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:24:46,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:24:46,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:24:46,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:24:46,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:24:46,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:24:46,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:24:46,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:24:46,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:24:46,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:24:46,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:24:46,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:24:46,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:24:46,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:24:46,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:24:46,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:24:46,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:24:46,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:24:46,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:24:46,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:24:46,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:24:46,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:24:46,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:24:46,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:24:46,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:24:46,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:24:46,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:24:46,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:24:46,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:24:46,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:24:46,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:24:46,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:24:46,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:24:46,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:24:46,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:24:46,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:24:46,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:24:46,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:24:46,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:24:46,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:24:46,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:24:46,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:24:47,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:24:47,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:24:47,001 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:24:47,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:24:47,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:24:47,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:24:47,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:24:47,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:24:47,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:24:47,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:24:47,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:24:47,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:24:47,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:24:47,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:24:47,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:24:47,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:24:47,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:24:47,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:24:47,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:24:47,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:24:47,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:24:47,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:24:47,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:24:47,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:24:47,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:24:47,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:24:47,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:24:47,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:24:47,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:24:47,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:24:47,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:24:47,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:24:47,517 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:24:47,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label11.c [2020-09-21 10:24:47,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84ab93f4e/501c9d1f900948f5953162d6252f201a/FLAG5be7ad09a [2020-09-21 10:24:48,235 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:24:48,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label11.c [2020-09-21 10:24:48,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84ab93f4e/501c9d1f900948f5953162d6252f201a/FLAG5be7ad09a [2020-09-21 10:24:48,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84ab93f4e/501c9d1f900948f5953162d6252f201a [2020-09-21 10:24:48,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:24:48,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:24:48,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:24:48,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:24:48,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:24:48,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:24:48" (1/1) ... [2020-09-21 10:24:48,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3705ef2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:48, skipping insertion in model container [2020-09-21 10:24:48,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:24:48" (1/1) ... [2020-09-21 10:24:48,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:24:48,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:24:49,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:24:49,153 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:24:49,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:24:49,331 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:24:49,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49 WrapperNode [2020-09-21 10:24:49,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:24:49,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:24:49,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:24:49,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:24:49,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (1/1) ... [2020-09-21 10:24:49,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (1/1) ... [2020-09-21 10:24:49,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (1/1) ... [2020-09-21 10:24:49,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (1/1) ... [2020-09-21 10:24:49,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (1/1) ... [2020-09-21 10:24:49,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (1/1) ... [2020-09-21 10:24:49,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (1/1) ... [2020-09-21 10:24:49,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:24:49,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:24:49,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:24:49,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:24:49,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:24:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:24:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:24:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-21 10:24:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:24:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-21 10:24:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:24:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:24:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:24:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:24:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:24:49,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:24:50,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:24:50,913 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:24:50,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:24:50 BoogieIcfgContainer [2020-09-21 10:24:50,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:24:50,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:24:50,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:24:50,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:24:50,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:24:48" (1/3) ... [2020-09-21 10:24:50,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ed7552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:24:50, skipping insertion in model container [2020-09-21 10:24:50,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:24:49" (2/3) ... [2020-09-21 10:24:50,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ed7552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:24:50, skipping insertion in model container [2020-09-21 10:24:50,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:24:50" (3/3) ... [2020-09-21 10:24:50,932 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label11.c [2020-09-21 10:24:50,945 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:24:50,956 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:24:50,980 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:24:51,013 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:24:51,013 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:24:51,013 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:24:51,014 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:24:51,014 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:24:51,014 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:24:51,014 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:24:51,014 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:24:51,042 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-09-21 10:24:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 10:24:51,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:24:51,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:24:51,057 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:24:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:24:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1918215546, now seen corresponding path program 1 times [2020-09-21 10:24:51,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:24:51,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664231809] [2020-09-21 10:24:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:24:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:51,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:24:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:24:51,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664231809] [2020-09-21 10:24:51,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:24:51,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:24:51,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834171275] [2020-09-21 10:24:51,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:24:51,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:24:51,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:24:51,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:24:51,580 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2020-09-21 10:24:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:24:53,860 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2020-09-21 10:24:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:24:53,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-09-21 10:24:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:24:53,885 INFO L225 Difference]: With dead ends: 730 [2020-09-21 10:24:53,886 INFO L226 Difference]: Without dead ends: 447 [2020-09-21 10:24:53,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:24:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-09-21 10:24:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2020-09-21 10:24:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-09-21 10:24:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 615 transitions. [2020-09-21 10:24:53,998 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 615 transitions. Word has length 67 [2020-09-21 10:24:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:24:53,999 INFO L479 AbstractCegarLoop]: Abstraction has 443 states and 615 transitions. [2020-09-21 10:24:53,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:24:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 615 transitions. [2020-09-21 10:24:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-21 10:24:54,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:24:54,009 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:24:54,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:24:54,009 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:24:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:24:54,010 INFO L82 PathProgramCache]: Analyzing trace with hash 387828613, now seen corresponding path program 1 times [2020-09-21 10:24:54,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:24:54,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428430963] [2020-09-21 10:24:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:24:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:54,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:24:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:54,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:24:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:24:54,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428430963] [2020-09-21 10:24:54,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:24:54,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:24:54,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602842929] [2020-09-21 10:24:54,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:24:54,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:24:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:24:54,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:24:54,398 INFO L87 Difference]: Start difference. First operand 443 states and 615 transitions. Second operand 7 states. [2020-09-21 10:24:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:24:55,928 INFO L93 Difference]: Finished difference Result 1033 states and 1409 transitions. [2020-09-21 10:24:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:24:55,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2020-09-21 10:24:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:24:55,934 INFO L225 Difference]: With dead ends: 1033 [2020-09-21 10:24:55,934 INFO L226 Difference]: Without dead ends: 596 [2020-09-21 10:24:55,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:24:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2020-09-21 10:24:55,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 592. [2020-09-21 10:24:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-09-21 10:24:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 781 transitions. [2020-09-21 10:24:55,976 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 781 transitions. Word has length 144 [2020-09-21 10:24:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:24:55,976 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 781 transitions. [2020-09-21 10:24:55,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:24:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 781 transitions. [2020-09-21 10:24:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-09-21 10:24:55,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:24:55,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:24:55,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:24:55,997 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:24:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:24:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1146813015, now seen corresponding path program 1 times [2020-09-21 10:24:55,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:24:55,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159578777] [2020-09-21 10:24:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:24:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:56,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:24:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:56,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:24:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:56,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:24:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 112 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-21 10:24:56,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159578777] [2020-09-21 10:24:56,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:24:56,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:24:56,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228020835] [2020-09-21 10:24:56,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:24:56,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:24:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:24:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:24:56,414 INFO L87 Difference]: Start difference. First operand 592 states and 781 transitions. Second operand 7 states. [2020-09-21 10:24:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:24:58,868 INFO L93 Difference]: Finished difference Result 1768 states and 2478 transitions. [2020-09-21 10:24:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:24:58,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 214 [2020-09-21 10:24:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:24:58,892 INFO L225 Difference]: With dead ends: 1768 [2020-09-21 10:24:58,892 INFO L226 Difference]: Without dead ends: 1325 [2020-09-21 10:24:58,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:24:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2020-09-21 10:24:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1180. [2020-09-21 10:24:58,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2020-09-21 10:24:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1600 transitions. [2020-09-21 10:24:58,998 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1600 transitions. Word has length 214 [2020-09-21 10:24:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:24:59,000 INFO L479 AbstractCegarLoop]: Abstraction has 1180 states and 1600 transitions. [2020-09-21 10:24:59,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:24:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1600 transitions. [2020-09-21 10:24:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-09-21 10:24:59,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:24:59,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:24:59,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:24:59,019 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:24:59,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:24:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1807493347, now seen corresponding path program 1 times [2020-09-21 10:24:59,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:24:59,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158397513] [2020-09-21 10:24:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:24:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:59,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:24:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:59,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:24:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:24:59,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:24:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:25:00,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158397513] [2020-09-21 10:25:00,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:00,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:25:00,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988164948] [2020-09-21 10:25:00,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:25:00,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:00,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:25:00,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:25:00,022 INFO L87 Difference]: Start difference. First operand 1180 states and 1600 transitions. Second operand 12 states. [2020-09-21 10:25:02,717 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-09-21 10:25:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:04,173 INFO L93 Difference]: Finished difference Result 2974 states and 4211 transitions. [2020-09-21 10:25:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 10:25:04,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 256 [2020-09-21 10:25:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:04,189 INFO L225 Difference]: With dead ends: 2974 [2020-09-21 10:25:04,189 INFO L226 Difference]: Without dead ends: 1943 [2020-09-21 10:25:04,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:25:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2020-09-21 10:25:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1788. [2020-09-21 10:25:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1788 states. [2020-09-21 10:25:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2375 transitions. [2020-09-21 10:25:04,275 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2375 transitions. Word has length 256 [2020-09-21 10:25:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:04,276 INFO L479 AbstractCegarLoop]: Abstraction has 1788 states and 2375 transitions. [2020-09-21 10:25:04,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:25:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2375 transitions. [2020-09-21 10:25:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-21 10:25:04,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:04,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:04,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:25:04,284 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1006495754, now seen corresponding path program 1 times [2020-09-21 10:25:04,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:04,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671552896] [2020-09-21 10:25:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:04,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:04,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:04,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:25:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 124 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:25:04,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671552896] [2020-09-21 10:25:04,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:04,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:25:04,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71434613] [2020-09-21 10:25:04,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:25:04,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:04,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:25:04,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:25:04,983 INFO L87 Difference]: Start difference. First operand 1788 states and 2375 transitions. Second operand 10 states. [2020-09-21 10:25:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:08,998 INFO L93 Difference]: Finished difference Result 4483 states and 6103 transitions. [2020-09-21 10:25:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:25:09,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 265 [2020-09-21 10:25:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:09,020 INFO L225 Difference]: With dead ends: 4483 [2020-09-21 10:25:09,020 INFO L226 Difference]: Without dead ends: 2817 [2020-09-21 10:25:09,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:25:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2020-09-21 10:25:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2380. [2020-09-21 10:25:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2020-09-21 10:25:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3210 transitions. [2020-09-21 10:25:09,124 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3210 transitions. Word has length 265 [2020-09-21 10:25:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:09,126 INFO L479 AbstractCegarLoop]: Abstraction has 2380 states and 3210 transitions. [2020-09-21 10:25:09,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:25:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3210 transitions. [2020-09-21 10:25:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-21 10:25:09,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:09,138 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:09,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:25:09,138 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:09,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:09,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1040380270, now seen corresponding path program 1 times [2020-09-21 10:25:09,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:09,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767610750] [2020-09-21 10:25:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:09,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:09,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:09,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-21 10:25:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 232 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:25:09,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767610750] [2020-09-21 10:25:09,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:09,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:25:09,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310843827] [2020-09-21 10:25:09,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:25:09,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:25:09,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:25:09,738 INFO L87 Difference]: Start difference. First operand 2380 states and 3210 transitions. Second operand 9 states. [2020-09-21 10:25:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:15,175 INFO L93 Difference]: Finished difference Result 5507 states and 7463 transitions. [2020-09-21 10:25:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:25:15,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 301 [2020-09-21 10:25:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:15,199 INFO L225 Difference]: With dead ends: 5507 [2020-09-21 10:25:15,199 INFO L226 Difference]: Without dead ends: 3276 [2020-09-21 10:25:15,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:25:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2020-09-21 10:25:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 3272. [2020-09-21 10:25:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3272 states. [2020-09-21 10:25:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 4302 transitions. [2020-09-21 10:25:15,296 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 4302 transitions. Word has length 301 [2020-09-21 10:25:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:15,297 INFO L479 AbstractCegarLoop]: Abstraction has 3272 states and 4302 transitions. [2020-09-21 10:25:15,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:25:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 4302 transitions. [2020-09-21 10:25:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-09-21 10:25:15,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:15,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:15,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:25:15,311 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1714845138, now seen corresponding path program 1 times [2020-09-21 10:25:15,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:15,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191555307] [2020-09-21 10:25:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:15,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:15,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:15,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-21 10:25:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:15,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-09-21 10:25:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 363 proven. 8 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-09-21 10:25:15,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191555307] [2020-09-21 10:25:15,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:15,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:25:15,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326216627] [2020-09-21 10:25:15,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:25:15,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:25:15,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:25:15,937 INFO L87 Difference]: Start difference. First operand 3272 states and 4302 transitions. Second operand 9 states. [2020-09-21 10:25:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:19,918 INFO L93 Difference]: Finished difference Result 7541 states and 10111 transitions. [2020-09-21 10:25:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:25:19,919 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 373 [2020-09-21 10:25:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:19,938 INFO L225 Difference]: With dead ends: 7541 [2020-09-21 10:25:19,938 INFO L226 Difference]: Without dead ends: 4418 [2020-09-21 10:25:19,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:25:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2020-09-21 10:25:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 2986. [2020-09-21 10:25:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2986 states. [2020-09-21 10:25:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 3596 transitions. [2020-09-21 10:25:20,048 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 3596 transitions. Word has length 373 [2020-09-21 10:25:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:20,049 INFO L479 AbstractCegarLoop]: Abstraction has 2986 states and 3596 transitions. [2020-09-21 10:25:20,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:25:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 3596 transitions. [2020-09-21 10:25:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-09-21 10:25:20,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:20,063 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:20,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:25:20,064 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 348873925, now seen corresponding path program 1 times [2020-09-21 10:25:20,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:20,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122905649] [2020-09-21 10:25:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:20,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:20,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:20,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-21 10:25:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:20,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-09-21 10:25:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 255 proven. 187 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:25:20,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122905649] [2020-09-21 10:25:20,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:20,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:25:20,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968910534] [2020-09-21 10:25:20,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:25:20,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:25:20,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:25:20,846 INFO L87 Difference]: Start difference. First operand 2986 states and 3596 transitions. Second operand 11 states. [2020-09-21 10:25:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:26,761 INFO L93 Difference]: Finished difference Result 6564 states and 8120 transitions. [2020-09-21 10:25:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 10:25:26,765 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 378 [2020-09-21 10:25:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:26,782 INFO L225 Difference]: With dead ends: 6564 [2020-09-21 10:25:26,782 INFO L226 Difference]: Without dead ends: 4023 [2020-09-21 10:25:26,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:25:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2020-09-21 10:25:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3435. [2020-09-21 10:25:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3435 states. [2020-09-21 10:25:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4055 transitions. [2020-09-21 10:25:26,872 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4055 transitions. Word has length 378 [2020-09-21 10:25:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:26,873 INFO L479 AbstractCegarLoop]: Abstraction has 3435 states and 4055 transitions. [2020-09-21 10:25:26,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:25:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4055 transitions. [2020-09-21 10:25:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-09-21 10:25:26,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:26,888 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:26,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:25:26,888 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1328157818, now seen corresponding path program 1 times [2020-09-21 10:25:26,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:26,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023987743] [2020-09-21 10:25:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:27,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:27,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:27,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:25:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:27,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-09-21 10:25:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 185 proven. 188 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-21 10:25:27,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023987743] [2020-09-21 10:25:27,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:27,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:25:27,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792925157] [2020-09-21 10:25:27,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:25:27,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:27,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:25:27,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:25:27,866 INFO L87 Difference]: Start difference. First operand 3435 states and 4055 transitions. Second operand 14 states. [2020-09-21 10:25:28,610 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-09-21 10:25:31,306 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-09-21 10:25:31,691 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-09-21 10:25:32,918 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-09-21 10:25:33,517 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-09-21 10:25:34,131 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-09-21 10:25:34,377 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-09-21 10:25:34,506 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-09-21 10:25:34,841 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-09-21 10:25:35,478 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-09-21 10:25:36,206 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-09-21 10:25:37,052 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-09-21 10:25:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:37,535 INFO L93 Difference]: Finished difference Result 7319 states and 8836 transitions. [2020-09-21 10:25:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-21 10:25:37,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 389 [2020-09-21 10:25:37,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:37,553 INFO L225 Difference]: With dead ends: 7319 [2020-09-21 10:25:37,553 INFO L226 Difference]: Without dead ends: 4478 [2020-09-21 10:25:37,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=629, Invalid=2677, Unknown=0, NotChecked=0, Total=3306 [2020-09-21 10:25:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2020-09-21 10:25:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 3882. [2020-09-21 10:25:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3882 states. [2020-09-21 10:25:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 4571 transitions. [2020-09-21 10:25:37,647 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 4571 transitions. Word has length 389 [2020-09-21 10:25:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:37,647 INFO L479 AbstractCegarLoop]: Abstraction has 3882 states and 4571 transitions. [2020-09-21 10:25:37,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:25:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 4571 transitions. [2020-09-21 10:25:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-09-21 10:25:37,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:37,659 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:37,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:25:37,659 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash -301430794, now seen corresponding path program 1 times [2020-09-21 10:25:37,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:37,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941555226] [2020-09-21 10:25:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:37,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:37,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:37,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-21 10:25:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:38,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-09-21 10:25:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 376 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-09-21 10:25:38,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941555226] [2020-09-21 10:25:38,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:38,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:25:38,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055333523] [2020-09-21 10:25:38,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:25:38,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:25:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:25:38,475 INFO L87 Difference]: Start difference. First operand 3882 states and 4571 transitions. Second operand 12 states. [2020-09-21 10:25:39,299 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-09-21 10:25:39,477 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-09-21 10:25:40,317 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-09-21 10:25:42,070 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-09-21 10:25:42,739 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-09-21 10:25:43,119 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-09-21 10:25:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:43,807 INFO L93 Difference]: Finished difference Result 7333 states and 8707 transitions. [2020-09-21 10:25:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 10:25:43,808 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 397 [2020-09-21 10:25:43,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:43,837 INFO L225 Difference]: With dead ends: 7333 [2020-09-21 10:25:43,837 INFO L226 Difference]: Without dead ends: 4045 [2020-09-21 10:25:43,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 10:25:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2020-09-21 10:25:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 4021. [2020-09-21 10:25:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4021 states. [2020-09-21 10:25:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 4663 transitions. [2020-09-21 10:25:43,954 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 4663 transitions. Word has length 397 [2020-09-21 10:25:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:43,955 INFO L479 AbstractCegarLoop]: Abstraction has 4021 states and 4663 transitions. [2020-09-21 10:25:43,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:25:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 4663 transitions. [2020-09-21 10:25:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-21 10:25:43,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:43,973 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:43,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:25:43,973 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:43,974 INFO L82 PathProgramCache]: Analyzing trace with hash 252720706, now seen corresponding path program 1 times [2020-09-21 10:25:43,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:43,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523288808] [2020-09-21 10:25:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:44,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:44,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:44,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-21 10:25:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:44,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-09-21 10:25:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 183 proven. 3 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-09-21 10:25:44,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523288808] [2020-09-21 10:25:44,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:44,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:25:44,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917092041] [2020-09-21 10:25:44,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:25:44,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:25:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:25:44,533 INFO L87 Difference]: Start difference. First operand 4021 states and 4663 transitions. Second operand 5 states. [2020-09-21 10:25:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:46,038 INFO L93 Difference]: Finished difference Result 5187 states and 6108 transitions. [2020-09-21 10:25:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:25:46,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-21 10:25:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:46,040 INFO L225 Difference]: With dead ends: 5187 [2020-09-21 10:25:46,040 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:25:46,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:25:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:25:46,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:25:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:25:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:25:46,049 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 407 [2020-09-21 10:25:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:46,049 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:25:46,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:25:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:25:46,050 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:25:46,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:25:46,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.