/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:04:11,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:04:11,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:04:11,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:04:11,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:04:11,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:04:11,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:04:11,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:04:11,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:04:11,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:04:11,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:04:11,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:04:11,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:04:11,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:04:11,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:04:11,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:04:11,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:04:11,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:04:11,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:04:11,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:04:11,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:04:11,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:04:11,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:04:11,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:04:11,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:04:11,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:04:11,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:04:11,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:04:11,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:04:11,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:04:11,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:04:11,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:04:11,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:04:11,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:04:11,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:04:11,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:04:11,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:04:11,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:04:11,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:04:11,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:04:11,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:04:11,582 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 [2020-09-24 17:04:11,622 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:04:11,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:04:11,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:04:11,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:04:11,625 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:04:11,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:04:11,626 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:04:11,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:04:11,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:04:11,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:04:11,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:04:11,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:04:11,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:04:11,628 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:04:11,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:04:11,629 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:04:11,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:04:11,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:04:11,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:04:11,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:04:11,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:04:11,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:04:11,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:04:11,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:04:11,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:04:11,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:04:11,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:04:11,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:04:11,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:04:11,631 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:04:12,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:04:12,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:04:12,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:04:12,144 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:04:12,144 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:04:12,146 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-09-24 17:04:12,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccced9126/a068adcc6c084ec3b8e95c7812e47ac8/FLAGfa8f89e1b [2020-09-24 17:04:12,743 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:04:12,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-09-24 17:04:12,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccced9126/a068adcc6c084ec3b8e95c7812e47ac8/FLAGfa8f89e1b [2020-09-24 17:04:13,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccced9126/a068adcc6c084ec3b8e95c7812e47ac8 [2020-09-24 17:04:13,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:04:13,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:04:13,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:04:13,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:04:13,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:04:13,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424943e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13, skipping insertion in model container [2020-09-24 17:04:13,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:04:13,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:04:13,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:04:13,424 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:04:13,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:04:13,460 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:04:13,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13 WrapperNode [2020-09-24 17:04:13,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:04:13,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:04:13,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:04:13,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:04:13,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (1/1) ... [2020-09-24 17:04:13,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:04:13,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:04:13,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:04:13,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:04:13,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (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 [2020-09-24 17:04:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:04:13,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:04:13,649 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-24 17:04:13,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:04:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:04:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:04:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-24 17:04:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:04:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:04:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:04:13,857 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:04:13,857 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:04:13,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:04:13 BoogieIcfgContainer [2020-09-24 17:04:13,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:04:13,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:04:13,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:04:13,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:04:13,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:04:13" (1/3) ... [2020-09-24 17:04:13,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3456644b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:04:13, skipping insertion in model container [2020-09-24 17:04:13,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:04:13" (2/3) ... [2020-09-24 17:04:13,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3456644b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:04:13, skipping insertion in model container [2020-09-24 17:04:13,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:04:13" (3/3) ... [2020-09-24 17:04:13,873 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-09-24 17:04:13,885 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:04:13,897 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:04:13,925 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:04:13,969 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:04:13,970 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:04:13,970 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:04:13,970 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:04:13,970 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:04:13,970 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:04:13,974 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:04:13,974 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:04:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-24 17:04:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 17:04:14,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:14,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:14,048 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:14,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-09-24 17:04:14,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:14,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487407051] [2020-09-24 17:04:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:14,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:14,264 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:14,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 17:04:14,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:14,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 17:04:14,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:14,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:04:14,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:04:14,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:04:14,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:14,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:14,332 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:14,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:14,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:14,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:04:14,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:14,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:14,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:14,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:04:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:14,359 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:14,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:14,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:14,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 17:04:14,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:04:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:04:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:04:14,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487407051] [2020-09-24 17:04:14,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:04:14,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:04:14,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819404002] [2020-09-24 17:04:14,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:04:14,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:14,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:04:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:04:14,423 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-09-24 17:04:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:14,555 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-09-24 17:04:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:04:14,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 17:04:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:14,570 INFO L225 Difference]: With dead ends: 44 [2020-09-24 17:04:14,571 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 17:04:14,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:04:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 17:04:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 17:04:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:04:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:04:14,633 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-24 17:04:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:14,634 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:04:14,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:04:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:04:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 17:04:14,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:14,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:14,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:04:14,638 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-09-24 17:04:14,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:14,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483949384] [2020-09-24 17:04:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:14,751 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:14,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 17:04:14,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:14,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-24 17:04:14,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:14,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:04:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:04:14,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 17:04:14,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:14,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:14,777 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:14,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:14,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:14,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:04:14,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:14,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:14,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:14,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:04:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:14,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:14,827 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:14,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:04:14,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:14,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 17:04:14,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:04:14,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:04:14,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:04:14,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483949384] [2020-09-24 17:04:14,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:04:14,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:04:14,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720069503] [2020-09-24 17:04:14,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:04:14,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:14,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:04:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:04:14,871 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-24 17:04:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:14,952 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-24 17:04:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:04:14,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 17:04:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:14,954 INFO L225 Difference]: With dead ends: 36 [2020-09-24 17:04:14,954 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 17:04:14,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:04:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 17:04:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 17:04:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:04:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:04:14,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-09-24 17:04:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:14,965 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:04:14,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:04:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:04:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:04:14,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:14,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-24 17:04:14,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:04:14,967 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-09-24 17:04:14,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:14,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550261708] [2020-09-24 17:04:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:14,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,519 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:15,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 17:04:15,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:04:15,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-09-24 17:04:15,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:04:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 17:04:15,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:15,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:15,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,538 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:15,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:15,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:15,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:04:15,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:15,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:04:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,798 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:15,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 17:04:15,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:04:15,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-09-24 17:04:15,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:15,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:04:15,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:04:15,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:04:15,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:15,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:04:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:15,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,837 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:15,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:15,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:15,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:04:15,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:15,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:15,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:04:15,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:04:15,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:15,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:04:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:15,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:15,869 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:15,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:15,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:15,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:04:15,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:15,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:15,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 17:04:15,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:15,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:04:15,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550261708] [2020-09-24 17:04:15,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:04:15,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:04:15,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557343149] [2020-09-24 17:04:15,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:04:15,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:04:15,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:04:15,879 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-09-24 17:04:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:15,975 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-09-24 17:04:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:04:15,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 17:04:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:15,977 INFO L225 Difference]: With dead ends: 52 [2020-09-24 17:04:15,977 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 17:04:15,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:04:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 17:04:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-24 17:04:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 17:04:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-24 17:04:15,987 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 33 [2020-09-24 17:04:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:15,988 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-24 17:04:15,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:04:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-24 17:04:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 17:04:15,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:15,990 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 17:04:15,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:04:15,990 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash -643371531, now seen corresponding path program 1 times [2020-09-24 17:04:15,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:15,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318909416] [2020-09-24 17:04:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:16,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:16,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:16,409 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:16,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 17:04:16,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:04:16,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-09-24 17:04:16,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:04:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 17:04:16,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:16,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:16,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:16,433 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:16,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:16,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:16,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:04:16,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:16,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:16,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:16,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:16,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:16,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:04:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:16,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:16,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:16,791 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:16,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:04:16,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:04:16,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-09-24 17:04:16,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:16,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:16,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:04:16,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 17:04:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:16,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:04:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:16,848 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:16,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:04:16,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:16,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 17:04:16,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:16,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:04:16,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:16,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:04:16,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 17:04:16,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:04:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:16,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:16,883 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:16,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:16,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:16,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:04:16,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:04:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:16,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:04:16,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 17:04:16,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318909416] [2020-09-24 17:04:16,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:04:16,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:04:16,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953970873] [2020-09-24 17:04:16,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:04:16,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:04:16,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:04:16,912 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-09-24 17:04:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:16,985 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-09-24 17:04:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:04:16,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-24 17:04:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:16,987 INFO L225 Difference]: With dead ends: 42 [2020-09-24 17:04:16,988 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 17:04:16,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:04:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 17:04:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-24 17:04:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 17:04:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-24 17:04:16,997 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2020-09-24 17:04:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:16,998 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-24 17:04:16,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:04:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-24 17:04:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 17:04:17,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:17,001 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:17,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:04:17,001 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times [2020-09-24 17:04:17,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:17,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039604553] [2020-09-24 17:04:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:17,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,575 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:17,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 17:04:17,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:04:17,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-09-24 17:04:17,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:04:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 17:04:17,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:04:17,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:17,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,594 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:17,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:17,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:17,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:04:17,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:17,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:17,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:04:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:17,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,779 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:17,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 17:04:17,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:04:17,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-24 17:04:17,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:04:17,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 17:04:17,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:17,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:04:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:17,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,824 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:17,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:04:17,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:17,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 17:04:17,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:04:17,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:17,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:04:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:17,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:17,913 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:17,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:04:17,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:04:17,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 17:04:17,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:17,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:04:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:04:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:04:17,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:04:17,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039604553] [2020-09-24 17:04:17,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:04:17,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:04:17,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291399921] [2020-09-24 17:04:17,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:04:17,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:04:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:04:17,944 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-09-24 17:04:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:18,108 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-09-24 17:04:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:04:18,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-09-24 17:04:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:18,115 INFO L225 Difference]: With dead ends: 72 [2020-09-24 17:04:18,115 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:04:18,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:04:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:04:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-24 17:04:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 17:04:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-09-24 17:04:18,133 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 35 [2020-09-24 17:04:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:18,134 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-09-24 17:04:18,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:04:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-09-24 17:04:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 17:04:18,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:18,137 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-09-24 17:04:18,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:04:18,137 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 2 times [2020-09-24 17:04:18,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:18,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961110820] [2020-09-24 17:04:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:18,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:18,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:18,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:20,235 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:20,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:04:20,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:04:20,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2086 [2020-09-24 17:04:20,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:20,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:20,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:04:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 17:04:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:20,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:04:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:20,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:20,255 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:20,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:04:20,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:20,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:04:20,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:20,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:20,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:20,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:20,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:04:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:20,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:20,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,310 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:22,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:04:22,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:04:22,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2041 [2020-09-24 17:04:22,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:22,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:04:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:04:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 17:04:22,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:22,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:04:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:22,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,394 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:22,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:04:22,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:22,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 17:04:22,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:04:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 17:04:22,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:22,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:04:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,408 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:22,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:04:22,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:22,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:04:22,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:22,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:22,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:22,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:22,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:22,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:04:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:22,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,419 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:22,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:04:22,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:22,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:04:22,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:04:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:04:22,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:04:22,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:04:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:22,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,448 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:04:22,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:04:22,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:04:22,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 17:04:22,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:04:22,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:04:22,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:04:22,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:04:22,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:04:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-24 17:04:22,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961110820] [2020-09-24 17:04:22,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:04:22,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:04:22,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395935310] [2020-09-24 17:04:22,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:04:22,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:04:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:04:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:04:22,480 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-09-24 17:04:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:04:22,601 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-24 17:04:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:04:22,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-09-24 17:04:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:04:22,603 INFO L225 Difference]: With dead ends: 50 [2020-09-24 17:04:22,604 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:04:22,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:04:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:04:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-24 17:04:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 17:04:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-09-24 17:04:22,612 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 52 [2020-09-24 17:04:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:04:22,613 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-09-24 17:04:22,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:04:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-09-24 17:04:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 17:04:22,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:04:22,615 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:04:22,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:04:22,615 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:04:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:04:22,616 INFO L82 PathProgramCache]: Analyzing trace with hash 501566307, now seen corresponding path program 3 times [2020-09-24 17:04:22,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:04:22,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775800772] [2020-09-24 17:04:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:04:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:04:22,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:23,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:23,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:25,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:26,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:28,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:28,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:28,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:28,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:42,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:44,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:04:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking...