/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:25:02,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:25:02,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:25:02,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:25:02,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:25:02,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:25:02,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:25:02,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:25:02,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:25:02,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:25:02,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:25:02,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:25:02,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:25:02,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:25:02,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:25:02,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:25:02,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:25:02,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:25:02,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:25:02,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:25:02,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:25:02,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:25:02,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:25:02,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:25:02,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:25:02,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:25:02,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:25:02,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:25:02,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:25:02,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:25:02,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:25:02,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:25:02,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:25:02,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:25:02,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:25:02,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:25:02,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:25:02,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:25:02,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:25:02,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:25:02,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:25:02,407 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 [2020-09-25 11:25:02,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:25:02,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:25:02,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:25:02,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:25:02,447 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:25:02,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:25:02,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:25:02,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:25:02,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:25:02,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:25:02,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:25:02,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:25:02,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:25:02,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:25:02,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:25:02,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:25:02,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:25:02,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:25:02,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:25:02,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:25:02,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:25:02,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:25:02,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:25:02,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:25:02,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:25:02,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:25:02,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:25:02,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:25:02,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:25:02,455 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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:25:02,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:25:02,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:25:02,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:25:02,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:25:02,949 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:25:02,950 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 11:25:03,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f81eac51/4adbb2d5d8a644e1a99a23e5e225b4b8/FLAGe8581421b [2020-09-25 11:25:03,594 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:25:03,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 11:25:03,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f81eac51/4adbb2d5d8a644e1a99a23e5e225b4b8/FLAGe8581421b [2020-09-25 11:25:03,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f81eac51/4adbb2d5d8a644e1a99a23e5e225b4b8 [2020-09-25 11:25:03,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:25:03,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:25:03,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:25:03,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:25:03,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:25:03,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:25:03" (1/1) ... [2020-09-25 11:25:03,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a29a149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:03, skipping insertion in model container [2020-09-25 11:25:03,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:25:03" (1/1) ... [2020-09-25 11:25:03,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:25:03,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:25:04,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:25:04,214 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:25:04,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:25:04,251 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:25:04,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04 WrapperNode [2020-09-25 11:25:04,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:25:04,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:25:04,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:25:04,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:25:04,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (1/1) ... [2020-09-25 11:25:04,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (1/1) ... [2020-09-25 11:25:04,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (1/1) ... [2020-09-25 11:25:04,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (1/1) ... [2020-09-25 11:25:04,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (1/1) ... [2020-09-25 11:25:04,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (1/1) ... [2020-09-25 11:25:04,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (1/1) ... [2020-09-25 11:25:04,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:25:04,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:25:04,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:25:04,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:25:04,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (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 [2020-09-25 11:25:04,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:25:04,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:25:04,472 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 11:25:04,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:25:04,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:25:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:25:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:25:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 11:25:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:25:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:25:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:25:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:25:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:25:04,827 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:25:04,828 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 11:25:04,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:25:04 BoogieIcfgContainer [2020-09-25 11:25:04,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:25:04,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:25:04,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:25:04,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:25:04,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:25:03" (1/3) ... [2020-09-25 11:25:04,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e47dda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:25:04, skipping insertion in model container [2020-09-25 11:25:04,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:04" (2/3) ... [2020-09-25 11:25:04,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e47dda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:25:04, skipping insertion in model container [2020-09-25 11:25:04,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:25:04" (3/3) ... [2020-09-25 11:25:04,843 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-09-25 11:25:04,852 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:25:04,861 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:25:04,882 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:25:04,912 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:25:04,912 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:25:04,912 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:25:04,912 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:25:04,913 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:25:04,913 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:25:04,913 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:25:04,913 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:25:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-25 11:25:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 11:25:04,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:04,946 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] [2020-09-25 11:25:04,947 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash 288343897, now seen corresponding path program 1 times [2020-09-25 11:25:04,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:04,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789238552] [2020-09-25 11:25:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:05,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:05,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:05,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:25:05,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:05,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-25 11:25:05,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:05,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:05,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:05,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 11:25:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:25:05,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:05,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:05,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:05,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:05,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:05,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:25:05,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:05,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:05,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:05,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:05,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:05,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:05,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789238552] [2020-09-25 11:25:05,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:25:05,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 11:25:05,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977079975] [2020-09-25 11:25:05,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 11:25:05,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 11:25:05,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 11:25:05,255 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-09-25 11:25:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:05,288 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-09-25 11:25:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 11:25:05,290 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-09-25 11:25:05,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:05,303 INFO L225 Difference]: With dead ends: 75 [2020-09-25 11:25:05,303 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 11:25:05,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 11:25:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 11:25:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-25 11:25:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 11:25:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-25 11:25:05,355 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2020-09-25 11:25:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:05,356 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-25 11:25:05,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 11:25:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-25 11:25:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 11:25:05,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:05,358 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] [2020-09-25 11:25:05,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:25:05,359 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash 320540924, now seen corresponding path program 1 times [2020-09-25 11:25:05,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:05,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070984617] [2020-09-25 11:25:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:05,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:05,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:05,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:25:05,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:05,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-09-25 11:25:05,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:05,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:05,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:25:05,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 11:25:05,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:25:05,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:05,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:05,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:05,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:05,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:05,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:05,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:05,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:05,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:05,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070984617] [2020-09-25 11:25:05,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:25:05,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:25:05,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951085927] [2020-09-25 11:25:05,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:25:05,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:05,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:25:05,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:25:05,643 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2020-09-25 11:25:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:05,762 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-09-25 11:25:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:25:05,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 11:25:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:05,764 INFO L225 Difference]: With dead ends: 67 [2020-09-25 11:25:05,765 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 11:25:05,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:25:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 11:25:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-09-25 11:25:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 11:25:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-25 11:25:05,775 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2020-09-25 11:25:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:05,775 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-25 11:25:05,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:25:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-25 11:25:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 11:25:05,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:05,777 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] [2020-09-25 11:25:05,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:25:05,778 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash 751787059, now seen corresponding path program 1 times [2020-09-25 11:25:05,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:05,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558820657] [2020-09-25 11:25:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:05,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:06,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:06,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 11:25:06,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:06,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-09-25 11:25:06,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:06,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:25:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 11:25:06,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:06,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:06,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:06,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:06,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:06,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:06,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:06,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:06,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:06,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:06,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:06,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558820657] [2020-09-25 11:25:06,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:06,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:25:06,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585299934] [2020-09-25 11:25:06,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:25:06,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:25:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:25:06,150 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 7 states. [2020-09-25 11:25:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:06,304 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-25 11:25:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:25:06,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-25 11:25:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:06,309 INFO L225 Difference]: With dead ends: 88 [2020-09-25 11:25:06,309 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 11:25:06,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:25:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 11:25:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-09-25 11:25:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-25 11:25:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-25 11:25:06,335 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 37 [2020-09-25 11:25:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:06,336 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-25 11:25:06,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:25:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-25 11:25:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 11:25:06,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:06,337 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] [2020-09-25 11:25:06,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:25:06,339 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash 3796503, now seen corresponding path program 1 times [2020-09-25 11:25:06,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:06,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265751499] [2020-09-25 11:25:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:06,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:06,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:06,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 11:25:06,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:06,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-09-25 11:25:06,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:06,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:06,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:25:06,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:25:06,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 11:25:06,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:06,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:06,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:06,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:06,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:06,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:06,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:06,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:06,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:06,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:06,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265751499] [2020-09-25 11:25:06,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:06,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:25:06,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839689645] [2020-09-25 11:25:06,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:25:06,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:25:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:25:06,637 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 7 states. [2020-09-25 11:25:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:06,787 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-09-25 11:25:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:25:06,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 11:25:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:06,797 INFO L225 Difference]: With dead ends: 105 [2020-09-25 11:25:06,797 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 11:25:06,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:25:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 11:25:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-09-25 11:25:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 11:25:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 11:25:06,823 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 38 [2020-09-25 11:25:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:06,824 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 11:25:06,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:25:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 11:25:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 11:25:06,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:06,828 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] [2020-09-25 11:25:06,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:25:06,829 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:06,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:06,829 INFO L82 PathProgramCache]: Analyzing trace with hash 197728887, now seen corresponding path program 1 times [2020-09-25 11:25:06,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:06,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646134087] [2020-09-25 11:25:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:06,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:06,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:06,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 11:25:06,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:06,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-25 11:25:06,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:06,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:25:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:06,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 11:25:06,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:07,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:07,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:07,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:07,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:07,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:07,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:25:07,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:07,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:07,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:25:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:07,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646134087] [2020-09-25 11:25:07,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:07,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:25:07,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440801189] [2020-09-25 11:25:07,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:25:07,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:07,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:25:07,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:25:07,056 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 7 states. [2020-09-25 11:25:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:07,197 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-09-25 11:25:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:25:07,198 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 11:25:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:07,202 INFO L225 Difference]: With dead ends: 116 [2020-09-25 11:25:07,202 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 11:25:07,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:25:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 11:25:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-09-25 11:25:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-25 11:25:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2020-09-25 11:25:07,225 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 38 [2020-09-25 11:25:07,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:07,228 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2020-09-25 11:25:07,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:25:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2020-09-25 11:25:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 11:25:07,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:07,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:07,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:25:07,236 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash 88652198, now seen corresponding path program 1 times [2020-09-25 11:25:07,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:07,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001776346] [2020-09-25 11:25:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:07,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:07,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:08,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:08,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 11:25:08,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:08,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-09-25 11:25:08,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:08,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 11:25:08,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:25:08,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:08,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:08,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:08,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:08,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:08,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:08,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:08,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:08,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:08,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:08,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:08,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:08,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 11:25:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:08,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:08,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:08,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:08,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:08,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 11:25:08,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:08,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:08,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:08,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:08,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:08,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:08,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001776346] [2020-09-25 11:25:08,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:08,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:08,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662895536] [2020-09-25 11:25:08,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:08,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:08,530 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 9 states. [2020-09-25 11:25:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:08,732 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-09-25 11:25:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:25:08,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 11:25:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:08,735 INFO L225 Difference]: With dead ends: 129 [2020-09-25 11:25:08,735 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 11:25:08,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:25:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 11:25:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2020-09-25 11:25:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 11:25:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-09-25 11:25:08,748 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 49 [2020-09-25 11:25:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:08,748 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-09-25 11:25:08,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-09-25 11:25:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 11:25:08,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:08,750 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:08,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:25:08,750 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:08,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1084443264, now seen corresponding path program 1 times [2020-09-25 11:25:08,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:08,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371404856] [2020-09-25 11:25:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:08,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:08,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:08,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:09,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:09,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 11:25:09,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:09,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-09-25 11:25:09,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:09,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:25:09,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:09,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:09,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:09,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:09,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:09,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:09,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:09,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:09,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:09,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371404856] [2020-09-25 11:25:09,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:09,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:09,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116760238] [2020-09-25 11:25:09,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:09,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:09,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:09,447 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 9 states. [2020-09-25 11:25:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:09,681 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2020-09-25 11:25:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:25:09,682 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 11:25:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:09,683 INFO L225 Difference]: With dead ends: 164 [2020-09-25 11:25:09,684 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 11:25:09,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:25:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 11:25:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-09-25 11:25:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-25 11:25:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-09-25 11:25:09,702 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 48 [2020-09-25 11:25:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:09,702 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-09-25 11:25:09,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-09-25 11:25:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 11:25:09,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:09,704 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:09,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:25:09,705 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1278375648, now seen corresponding path program 1 times [2020-09-25 11:25:09,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:09,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078459407] [2020-09-25 11:25:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:09,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:09,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:09,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:10,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:10,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 11:25:10,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-09-25 11:25:10,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:10,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:25:10,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:10,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:10,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:10,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:10,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:10,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:10,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:10,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:10,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:10,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:10,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:10,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078459407] [2020-09-25 11:25:10,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:10,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:10,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697015340] [2020-09-25 11:25:10,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:10,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:10,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:10,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:10,428 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 9 states. [2020-09-25 11:25:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:10,666 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-09-25 11:25:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:25:10,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 11:25:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:10,669 INFO L225 Difference]: With dead ends: 185 [2020-09-25 11:25:10,670 INFO L226 Difference]: Without dead ends: 183 [2020-09-25 11:25:10,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:25:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-25 11:25:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2020-09-25 11:25:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-25 11:25:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2020-09-25 11:25:10,698 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 48 [2020-09-25 11:25:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:10,698 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2020-09-25 11:25:10,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2020-09-25 11:25:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 11:25:10,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:10,700 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:10,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:25:10,701 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash -287517810, now seen corresponding path program 2 times [2020-09-25 11:25:10,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:10,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086111953] [2020-09-25 11:25:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:10,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:11,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:11,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 11:25:11,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:11,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-09-25 11:25:11,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:11,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:25:11,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:11,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:11,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:11,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:11,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:11,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:11,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:11,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:11,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:11,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:11,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086111953] [2020-09-25 11:25:11,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:11,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:11,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811078460] [2020-09-25 11:25:11,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:11,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:11,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:11,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:11,386 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand 9 states. [2020-09-25 11:25:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:11,593 INFO L93 Difference]: Finished difference Result 227 states and 262 transitions. [2020-09-25 11:25:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 11:25:11,594 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 11:25:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:11,596 INFO L225 Difference]: With dead ends: 227 [2020-09-25 11:25:11,596 INFO L226 Difference]: Without dead ends: 225 [2020-09-25 11:25:11,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:25:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-25 11:25:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 184. [2020-09-25 11:25:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 11:25:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2020-09-25 11:25:11,607 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 48 [2020-09-25 11:25:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:11,607 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2020-09-25 11:25:11,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2020-09-25 11:25:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 11:25:11,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:11,609 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:11,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:25:11,610 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash 942147566, now seen corresponding path program 2 times [2020-09-25 11:25:11,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:11,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587748261] [2020-09-25 11:25:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:11,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:11,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:12,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:12,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 11:25:12,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:12,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-09-25 11:25:12,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:12,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:25:12,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:12,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:12,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:12,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:12,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:12,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:12,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:12,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:12,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:12,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:12,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:12,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:12,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587748261] [2020-09-25 11:25:12,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:12,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:12,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342779547] [2020-09-25 11:25:12,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:12,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:12,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:12,230 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 9 states. [2020-09-25 11:25:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:12,417 INFO L93 Difference]: Finished difference Result 257 states and 299 transitions. [2020-09-25 11:25:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 11:25:12,418 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 11:25:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:12,420 INFO L225 Difference]: With dead ends: 257 [2020-09-25 11:25:12,420 INFO L226 Difference]: Without dead ends: 255 [2020-09-25 11:25:12,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:25:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-25 11:25:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 215. [2020-09-25 11:25:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 11:25:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 11:25:12,434 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 48 [2020-09-25 11:25:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:12,435 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 11:25:12,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 11:25:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 11:25:12,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:12,437 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:12,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 11:25:12,437 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1391225462, now seen corresponding path program 1 times [2020-09-25 11:25:12,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:12,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483909183] [2020-09-25 11:25:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:12,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:12,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:13,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:13,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 11:25:13,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 872 [2020-09-25 11:25:13,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:13,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:25:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 11:25:13,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:13,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:13,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:13,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:13,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:13,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:13,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:13,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:13,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:13,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:13,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:13,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:13,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:13,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 11:25:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:13,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:13,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:13,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:13,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:13,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 11:25:13,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:13,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:13,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:13,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:13,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:13,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:13,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483909183] [2020-09-25 11:25:13,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:13,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:13,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881395045] [2020-09-25 11:25:13,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:13,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:13,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:13,437 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 11:25:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:13,629 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2020-09-25 11:25:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:25:13,630 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 11:25:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:13,632 INFO L225 Difference]: With dead ends: 245 [2020-09-25 11:25:13,632 INFO L226 Difference]: Without dead ends: 243 [2020-09-25 11:25:13,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:25:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-25 11:25:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2020-09-25 11:25:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 11:25:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 11:25:13,642 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 50 [2020-09-25 11:25:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:13,643 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 11:25:13,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 11:25:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 11:25:13,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:13,644 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:13,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 11:25:13,644 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:13,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1955950980, now seen corresponding path program 1 times [2020-09-25 11:25:13,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:13,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561166356] [2020-09-25 11:25:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:13,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:13,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:13,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:14,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:14,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 11:25:14,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:14,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-09-25 11:25:14,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:14,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:14,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:14,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:14,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:25:14,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:14,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:14,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:14,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:14,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:14,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:14,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:14,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:14,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:14,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561166356] [2020-09-25 11:25:14,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:14,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:14,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106196285] [2020-09-25 11:25:14,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:14,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:14,243 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 11:25:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:14,445 INFO L93 Difference]: Finished difference Result 286 states and 334 transitions. [2020-09-25 11:25:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:25:14,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 11:25:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:14,448 INFO L225 Difference]: With dead ends: 286 [2020-09-25 11:25:14,448 INFO L226 Difference]: Without dead ends: 284 [2020-09-25 11:25:14,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:25:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-25 11:25:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2020-09-25 11:25:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-25 11:25:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2020-09-25 11:25:14,464 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 49 [2020-09-25 11:25:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:14,465 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2020-09-25 11:25:14,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2020-09-25 11:25:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 11:25:14,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:14,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:14,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 11:25:14,466 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -798805526, now seen corresponding path program 1 times [2020-09-25 11:25:14,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:14,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774298911] [2020-09-25 11:25:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:14,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:14,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:15,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:15,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 11:25:15,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:15,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-09-25 11:25:15,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:15,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 11:25:15,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:15,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:15,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:15,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:15,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:15,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:15,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:15,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:15,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:15,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:15,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:15,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:25:15,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 11:25:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:15,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:15,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:15,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:15,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:15,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:25:15,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:15,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:15,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:15,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:15,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:15,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:15,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774298911] [2020-09-25 11:25:15,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:15,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:15,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856287578] [2020-09-25 11:25:15,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:15,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:15,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:15,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:15,375 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand 9 states. [2020-09-25 11:25:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:15,612 INFO L93 Difference]: Finished difference Result 268 states and 313 transitions. [2020-09-25 11:25:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:25:15,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 11:25:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:15,616 INFO L225 Difference]: With dead ends: 268 [2020-09-25 11:25:15,617 INFO L226 Difference]: Without dead ends: 266 [2020-09-25 11:25:15,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:25:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-25 11:25:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 238. [2020-09-25 11:25:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-09-25 11:25:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 283 transitions. [2020-09-25 11:25:15,639 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 283 transitions. Word has length 50 [2020-09-25 11:25:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:15,640 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 283 transitions. [2020-09-25 11:25:15,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 283 transitions. [2020-09-25 11:25:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 11:25:15,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:15,642 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:15,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 11:25:15,642 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:15,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:15,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004924, now seen corresponding path program 2 times [2020-09-25 11:25:15,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:15,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654596745] [2020-09-25 11:25:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:15,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:15,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:15,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:16,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:16,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 11:25:16,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:16,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-09-25 11:25:16,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:16,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:25:16,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:16,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:16,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:16,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:16,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:16,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:16,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:16,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:16,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:16,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:16,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654596745] [2020-09-25 11:25:16,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:16,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:16,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525752113] [2020-09-25 11:25:16,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:16,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:16,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:16,228 INFO L87 Difference]: Start difference. First operand 238 states and 283 transitions. Second operand 9 states. [2020-09-25 11:25:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:16,436 INFO L93 Difference]: Finished difference Result 302 states and 354 transitions. [2020-09-25 11:25:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:25:16,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 11:25:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:16,439 INFO L225 Difference]: With dead ends: 302 [2020-09-25 11:25:16,439 INFO L226 Difference]: Without dead ends: 300 [2020-09-25 11:25:16,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:25:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-25 11:25:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 260. [2020-09-25 11:25:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-25 11:25:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 311 transitions. [2020-09-25 11:25:16,455 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 311 transitions. Word has length 49 [2020-09-25 11:25:16,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:16,456 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 311 transitions. [2020-09-25 11:25:16,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 311 transitions. [2020-09-25 11:25:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 11:25:16,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:16,457 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 11:25:16,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 11:25:16,458 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1367702887, now seen corresponding path program 2 times [2020-09-25 11:25:16,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:16,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656776043] [2020-09-25 11:25:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:16,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:16,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:16,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:18,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:18,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 11:25:18,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:25:18,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2091 [2020-09-25 11:25:18,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:18,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:18,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:18,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:18,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-25 11:25:18,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:18,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:18,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:18,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:18,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:18,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:18,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:18,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:18,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:18,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:18,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:18,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:18,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:18,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 11:25:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:18,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:18,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:18,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:18,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:18,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:25:18,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:18,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:18,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:18,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:25:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:18,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:18,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:18,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:18,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:25:18,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:18,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:18,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:18,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 11:25:18,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656776043] [2020-09-25 11:25:18,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:18,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:18,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64045657] [2020-09-25 11:25:18,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:18,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:18,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:18,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:18,690 INFO L87 Difference]: Start difference. First operand 260 states and 311 transitions. Second operand 11 states. [2020-09-25 11:25:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:18,947 INFO L93 Difference]: Finished difference Result 301 states and 352 transitions. [2020-09-25 11:25:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:25:18,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-09-25 11:25:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:18,951 INFO L225 Difference]: With dead ends: 301 [2020-09-25 11:25:18,951 INFO L226 Difference]: Without dead ends: 299 [2020-09-25 11:25:18,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-09-25 11:25:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-25 11:25:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 273. [2020-09-25 11:25:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-09-25 11:25:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 324 transitions. [2020-09-25 11:25:18,968 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 324 transitions. Word has length 61 [2020-09-25 11:25:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:18,969 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 324 transitions. [2020-09-25 11:25:18,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 324 transitions. [2020-09-25 11:25:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 11:25:18,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:18,974 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:18,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 11:25:18,975 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2112840589, now seen corresponding path program 1 times [2020-09-25 11:25:18,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:18,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237698713] [2020-09-25 11:25:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:18,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:19,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:19,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:19,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:19,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:20,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:20,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 11:25:20,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:25:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1784 [2020-09-25 11:25:20,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:20,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:20,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 11:25:20,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:20,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:20,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:20,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:20,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:20,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:20,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:20,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:20,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:20,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:20,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:20,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:20,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:20,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 11:25:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:20,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:20,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:20,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:20,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:20,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:25:20,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:20,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:20,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:20,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:20,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:20,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:20,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237698713] [2020-09-25 11:25:20,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:20,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:20,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382753069] [2020-09-25 11:25:20,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:20,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:20,887 INFO L87 Difference]: Start difference. First operand 273 states and 324 transitions. Second operand 11 states. [2020-09-25 11:25:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:21,240 INFO L93 Difference]: Finished difference Result 315 states and 368 transitions. [2020-09-25 11:25:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 11:25:21,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 11:25:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:21,243 INFO L225 Difference]: With dead ends: 315 [2020-09-25 11:25:21,243 INFO L226 Difference]: Without dead ends: 313 [2020-09-25 11:25:21,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-09-25 11:25:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-25 11:25:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 273. [2020-09-25 11:25:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-09-25 11:25:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 324 transitions. [2020-09-25 11:25:21,263 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 324 transitions. Word has length 60 [2020-09-25 11:25:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:21,263 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 324 transitions. [2020-09-25 11:25:21,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 324 transitions. [2020-09-25 11:25:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:21,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:21,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:21,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 11:25:21,266 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:21,266 INFO L82 PathProgramCache]: Analyzing trace with hash 320690707, now seen corresponding path program 3 times [2020-09-25 11:25:21,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:21,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569612636] [2020-09-25 11:25:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:21,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:23,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:23,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:23,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2006 [2020-09-25 11:25:23,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:23,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:25:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:23,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:23,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:23,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:23,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:23,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:23,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:23,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:23,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:23,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:23,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569612636] [2020-09-25 11:25:23,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:23,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:25:23,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016697237] [2020-09-25 11:25:23,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:25:23,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:25:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:25:23,418 INFO L87 Difference]: Start difference. First operand 273 states and 324 transitions. Second operand 10 states. [2020-09-25 11:25:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:23,991 INFO L93 Difference]: Finished difference Result 408 states and 479 transitions. [2020-09-25 11:25:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 11:25:23,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 11:25:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:24,000 INFO L225 Difference]: With dead ends: 408 [2020-09-25 11:25:24,000 INFO L226 Difference]: Without dead ends: 406 [2020-09-25 11:25:24,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:25:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-09-25 11:25:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 305. [2020-09-25 11:25:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-25 11:25:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 364 transitions. [2020-09-25 11:25:24,025 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 364 transitions. Word has length 59 [2020-09-25 11:25:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:24,026 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 364 transitions. [2020-09-25 11:25:24,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:25:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 364 transitions. [2020-09-25 11:25:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:24,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:24,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:24,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 11:25:24,027 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:24,028 INFO L82 PathProgramCache]: Analyzing trace with hash 514623091, now seen corresponding path program 1 times [2020-09-25 11:25:24,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:24,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220873836] [2020-09-25 11:25:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:24,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:26,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:26,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:26,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2223 [2020-09-25 11:25:26,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:26,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:26,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:26,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:26,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:26,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:26,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:26,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:26,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:26,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:26,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:26,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:26,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:26,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:26,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:26,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220873836] [2020-09-25 11:25:26,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:26,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:26,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008057016] [2020-09-25 11:25:26,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:26,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:26,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:26,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:26,366 INFO L87 Difference]: Start difference. First operand 305 states and 364 transitions. Second operand 11 states. [2020-09-25 11:25:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:26,698 INFO L93 Difference]: Finished difference Result 428 states and 508 transitions. [2020-09-25 11:25:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:25:26,699 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 11:25:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:26,702 INFO L225 Difference]: With dead ends: 428 [2020-09-25 11:25:26,702 INFO L226 Difference]: Without dead ends: 426 [2020-09-25 11:25:26,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:25:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-09-25 11:25:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 339. [2020-09-25 11:25:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-09-25 11:25:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 407 transitions. [2020-09-25 11:25:26,722 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 407 transitions. Word has length 59 [2020-09-25 11:25:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:26,722 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 407 transitions. [2020-09-25 11:25:26,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 407 transitions. [2020-09-25 11:25:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 11:25:26,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:26,724 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:26,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 11:25:26,724 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:26,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:26,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1520420653, now seen corresponding path program 1 times [2020-09-25 11:25:26,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:26,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8226888] [2020-09-25 11:25:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:27,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:28,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 11:25:28,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:25:28,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-09-25 11:25:28,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:28,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:28,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:28,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 11:25:28,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:28,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:28,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:28,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:28,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:28,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:28,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:28,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:28,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:28,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:28,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:28,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:28,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 11:25:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:28,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:28,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:28,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 11:25:28,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:28,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:28,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:28,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8226888] [2020-09-25 11:25:28,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:28,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:28,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044408878] [2020-09-25 11:25:28,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:28,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:28,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:28,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:28,906 INFO L87 Difference]: Start difference. First operand 339 states and 407 transitions. Second operand 11 states. [2020-09-25 11:25:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:29,306 INFO L93 Difference]: Finished difference Result 401 states and 476 transitions. [2020-09-25 11:25:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 11:25:29,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 11:25:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:29,309 INFO L225 Difference]: With dead ends: 401 [2020-09-25 11:25:29,309 INFO L226 Difference]: Without dead ends: 399 [2020-09-25 11:25:29,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-09-25 11:25:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-09-25 11:25:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 360. [2020-09-25 11:25:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-09-25 11:25:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 433 transitions. [2020-09-25 11:25:29,328 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 433 transitions. Word has length 60 [2020-09-25 11:25:29,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:29,328 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 433 transitions. [2020-09-25 11:25:29,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 433 transitions. [2020-09-25 11:25:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:29,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:29,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:29,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 11:25:29,330 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash -214388301, now seen corresponding path program 2 times [2020-09-25 11:25:29,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:29,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461772803] [2020-09-25 11:25:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:29,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:29,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:29,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:29,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:29,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:29,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:31,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:31,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:31,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2043 [2020-09-25 11:25:31,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:31,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:31,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:31,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:31,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:31,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:31,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:31,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:31,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:31,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:31,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:31,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:31,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:31,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:31,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:31,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:31,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:31,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461772803] [2020-09-25 11:25:31,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:31,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:31,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663684421] [2020-09-25 11:25:31,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:31,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:31,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:31,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:31,490 INFO L87 Difference]: Start difference. First operand 360 states and 433 transitions. Second operand 11 states. [2020-09-25 11:25:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:31,896 INFO L93 Difference]: Finished difference Result 522 states and 625 transitions. [2020-09-25 11:25:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 11:25:31,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 11:25:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:31,900 INFO L225 Difference]: With dead ends: 522 [2020-09-25 11:25:31,900 INFO L226 Difference]: Without dead ends: 520 [2020-09-25 11:25:31,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-09-25 11:25:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-09-25 11:25:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 445. [2020-09-25 11:25:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-09-25 11:25:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 539 transitions. [2020-09-25 11:25:31,948 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 539 transitions. Word has length 59 [2020-09-25 11:25:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:31,948 INFO L479 AbstractCegarLoop]: Abstraction has 445 states and 539 transitions. [2020-09-25 11:25:31,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 539 transitions. [2020-09-25 11:25:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:31,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:31,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:31,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 11:25:31,950 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash -20455917, now seen corresponding path program 3 times [2020-09-25 11:25:31,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:31,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96135840] [2020-09-25 11:25:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:31,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:32,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:32,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:32,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:32,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:32,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:33,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:33,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:33,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:33,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1795 [2020-09-25 11:25:33,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:33,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:25:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:33,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:33,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:33,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:33,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:33,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:33,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:33,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:33,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:33,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:33,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:33,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:33,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:33,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96135840] [2020-09-25 11:25:33,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:33,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:25:33,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455100728] [2020-09-25 11:25:33,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:25:33,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:25:33,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:25:33,856 INFO L87 Difference]: Start difference. First operand 445 states and 539 transitions. Second operand 10 states. [2020-09-25 11:25:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:34,399 INFO L93 Difference]: Finished difference Result 582 states and 697 transitions. [2020-09-25 11:25:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 11:25:34,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 11:25:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:34,405 INFO L225 Difference]: With dead ends: 582 [2020-09-25 11:25:34,405 INFO L226 Difference]: Without dead ends: 580 [2020-09-25 11:25:34,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:25:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-09-25 11:25:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 478. [2020-09-25 11:25:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-25 11:25:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 581 transitions. [2020-09-25 11:25:34,452 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 581 transitions. Word has length 59 [2020-09-25 11:25:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:34,452 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 581 transitions. [2020-09-25 11:25:34,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:25:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 581 transitions. [2020-09-25 11:25:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 11:25:34,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:34,454 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:34,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 11:25:34,455 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash -865140607, now seen corresponding path program 2 times [2020-09-25 11:25:34,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:34,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076258615] [2020-09-25 11:25:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:34,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:34,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:34,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:34,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:36,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 11:25:36,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:25:36,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1743 [2020-09-25 11:25:36,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:36,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:36,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 11:25:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:36,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:36,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:36,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:36,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:36,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:36,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:36,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:36,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:36,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 11:25:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:36,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:36,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:36,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:25:36,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:36,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:36,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:36,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076258615] [2020-09-25 11:25:36,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:36,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:36,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932688034] [2020-09-25 11:25:36,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:36,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:36,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:36,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:36,380 INFO L87 Difference]: Start difference. First operand 478 states and 581 transitions. Second operand 11 states. [2020-09-25 11:25:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:36,726 INFO L93 Difference]: Finished difference Result 549 states and 657 transitions. [2020-09-25 11:25:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:25:36,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 11:25:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:36,732 INFO L225 Difference]: With dead ends: 549 [2020-09-25 11:25:36,732 INFO L226 Difference]: Without dead ends: 547 [2020-09-25 11:25:36,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:25:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-09-25 11:25:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 500. [2020-09-25 11:25:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-09-25 11:25:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 604 transitions. [2020-09-25 11:25:36,770 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 604 transitions. Word has length 60 [2020-09-25 11:25:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:36,771 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 604 transitions. [2020-09-25 11:25:36,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 604 transitions. [2020-09-25 11:25:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:36,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:36,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:36,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 11:25:36,774 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:36,775 INFO L82 PathProgramCache]: Analyzing trace with hash -193250235, now seen corresponding path program 4 times [2020-09-25 11:25:36,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:36,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446589410] [2020-09-25 11:25:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:36,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:38,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:38,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:38,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1591 [2020-09-25 11:25:38,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:38,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:38,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:25:38,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:38,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:38,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:38,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:38,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:38,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:38,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:38,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:38,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:38,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:38,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446589410] [2020-09-25 11:25:38,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:38,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:25:38,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039713647] [2020-09-25 11:25:38,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:25:38,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:25:38,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:25:38,494 INFO L87 Difference]: Start difference. First operand 500 states and 604 transitions. Second operand 10 states. [2020-09-25 11:25:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:38,824 INFO L93 Difference]: Finished difference Result 724 states and 861 transitions. [2020-09-25 11:25:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:25:38,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 11:25:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:38,828 INFO L225 Difference]: With dead ends: 724 [2020-09-25 11:25:38,829 INFO L226 Difference]: Without dead ends: 722 [2020-09-25 11:25:38,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:25:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2020-09-25 11:25:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 552. [2020-09-25 11:25:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-09-25 11:25:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 668 transitions. [2020-09-25 11:25:38,862 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 668 transitions. Word has length 59 [2020-09-25 11:25:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:38,862 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 668 transitions. [2020-09-25 11:25:38,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:25:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 668 transitions. [2020-09-25 11:25:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:38,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:38,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:38,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-25 11:25:38,864 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:38,865 INFO L82 PathProgramCache]: Analyzing trace with hash 682149, now seen corresponding path program 3 times [2020-09-25 11:25:38,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:38,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185192322] [2020-09-25 11:25:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:38,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:39,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:39,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:39,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:40,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:40,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:40,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-09-25 11:25:40,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:40,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:40,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:40,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:40,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:40,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:40,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:40,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:40,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185192322] [2020-09-25 11:25:40,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:40,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:40,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450737932] [2020-09-25 11:25:40,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:40,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:40,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:40,805 INFO L87 Difference]: Start difference. First operand 552 states and 668 transitions. Second operand 11 states. [2020-09-25 11:25:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:41,218 INFO L93 Difference]: Finished difference Result 729 states and 875 transitions. [2020-09-25 11:25:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:25:41,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 11:25:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:41,222 INFO L225 Difference]: With dead ends: 729 [2020-09-25 11:25:41,223 INFO L226 Difference]: Without dead ends: 727 [2020-09-25 11:25:41,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:25:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-09-25 11:25:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 638. [2020-09-25 11:25:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-09-25 11:25:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 776 transitions. [2020-09-25 11:25:41,272 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 776 transitions. Word has length 59 [2020-09-25 11:25:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:41,273 INFO L479 AbstractCegarLoop]: Abstraction has 638 states and 776 transitions. [2020-09-25 11:25:41,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 776 transitions. [2020-09-25 11:25:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:41,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:41,276 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:41,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-25 11:25:41,276 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:41,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1565211309, now seen corresponding path program 5 times [2020-09-25 11:25:41,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:41,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325790872] [2020-09-25 11:25:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:43,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:43,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:43,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:43,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1718 [2020-09-25 11:25:43,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:43,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:43,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:25:43,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:43,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:43,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:43,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:43,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:43,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:43,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:43,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:43,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:43,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:43,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:43,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325790872] [2020-09-25 11:25:43,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:43,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:25:43,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914428177] [2020-09-25 11:25:43,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:25:43,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:43,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:25:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:25:43,104 INFO L87 Difference]: Start difference. First operand 638 states and 776 transitions. Second operand 10 states. [2020-09-25 11:25:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:43,515 INFO L93 Difference]: Finished difference Result 801 states and 958 transitions. [2020-09-25 11:25:43,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:25:43,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 11:25:43,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:43,519 INFO L225 Difference]: With dead ends: 801 [2020-09-25 11:25:43,520 INFO L226 Difference]: Without dead ends: 799 [2020-09-25 11:25:43,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:25:43,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2020-09-25 11:25:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 670. [2020-09-25 11:25:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-09-25 11:25:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 816 transitions. [2020-09-25 11:25:43,566 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 816 transitions. Word has length 59 [2020-09-25 11:25:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:43,566 INFO L479 AbstractCegarLoop]: Abstraction has 670 states and 816 transitions. [2020-09-25 11:25:43,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:25:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 816 transitions. [2020-09-25 11:25:43,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:43,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:43,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:43,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-25 11:25:43,568 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash -335545933, now seen corresponding path program 4 times [2020-09-25 11:25:43,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:43,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045091675] [2020-09-25 11:25:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:43,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:43,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:43,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:43,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:43,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:43,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:45,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:45,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:45,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1726 [2020-09-25 11:25:45,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:45,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:45,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:45,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:45,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:45,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:45,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:45,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:45,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:45,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:45,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:45,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045091675] [2020-09-25 11:25:45,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:45,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:45,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103605895] [2020-09-25 11:25:45,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:45,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:45,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:45,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:45,413 INFO L87 Difference]: Start difference. First operand 670 states and 816 transitions. Second operand 11 states. [2020-09-25 11:25:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:45,755 INFO L93 Difference]: Finished difference Result 865 states and 1047 transitions. [2020-09-25 11:25:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:25:45,755 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 11:25:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:45,759 INFO L225 Difference]: With dead ends: 865 [2020-09-25 11:25:45,759 INFO L226 Difference]: Without dead ends: 863 [2020-09-25 11:25:45,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:25:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-09-25 11:25:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 755. [2020-09-25 11:25:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-09-25 11:25:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 921 transitions. [2020-09-25 11:25:45,822 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 921 transitions. Word has length 59 [2020-09-25 11:25:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:45,822 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 921 transitions. [2020-09-25 11:25:45,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 921 transitions. [2020-09-25 11:25:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 11:25:45,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:45,824 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:25:45,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-25 11:25:45,824 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1951488799, now seen corresponding path program 2 times [2020-09-25 11:25:45,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:45,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076318109] [2020-09-25 11:25:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:47,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:47,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 11:25:47,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:25:47,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1724 [2020-09-25 11:25:47,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:47,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:47,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:47,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:47,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 11:25:47,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:47,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:47,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:47,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:47,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:47,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:47,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:47,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:47,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:47,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:47,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 11:25:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:47,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:47,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:47,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:25:47,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:47,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:25:47,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:47,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:47,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:47,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:47,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:25:47,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:47,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076318109] [2020-09-25 11:25:47,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:47,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:47,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219719862] [2020-09-25 11:25:47,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:47,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:47,692 INFO L87 Difference]: Start difference. First operand 755 states and 921 transitions. Second operand 11 states. [2020-09-25 11:25:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:48,072 INFO L93 Difference]: Finished difference Result 825 states and 996 transitions. [2020-09-25 11:25:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:25:48,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 11:25:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:48,077 INFO L225 Difference]: With dead ends: 825 [2020-09-25 11:25:48,077 INFO L226 Difference]: Without dead ends: 823 [2020-09-25 11:25:48,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:25:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2020-09-25 11:25:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 755. [2020-09-25 11:25:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-09-25 11:25:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 921 transitions. [2020-09-25 11:25:48,112 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 921 transitions. Word has length 60 [2020-09-25 11:25:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:48,113 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 921 transitions. [2020-09-25 11:25:48,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 921 transitions. [2020-09-25 11:25:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:48,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:48,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:48,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-25 11:25:48,115 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:48,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463589, now seen corresponding path program 5 times [2020-09-25 11:25:48,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:48,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344032803] [2020-09-25 11:25:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:48,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:48,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:48,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:48,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:48,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:48,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:49,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:49,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:49,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:49,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1659 [2020-09-25 11:25:49,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:49,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:25:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:49,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:49,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:49,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:49,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:49,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:49,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:49,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:49,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:49,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:49,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:49,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:49,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:49,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344032803] [2020-09-25 11:25:49,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:49,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:25:49,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609825788] [2020-09-25 11:25:49,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:25:49,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:25:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:49,897 INFO L87 Difference]: Start difference. First operand 755 states and 921 transitions. Second operand 11 states. [2020-09-25 11:25:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:50,264 INFO L93 Difference]: Finished difference Result 907 states and 1099 transitions. [2020-09-25 11:25:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:25:50,264 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 11:25:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:50,269 INFO L225 Difference]: With dead ends: 907 [2020-09-25 11:25:50,270 INFO L226 Difference]: Without dead ends: 905 [2020-09-25 11:25:50,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:25:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2020-09-25 11:25:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 821. [2020-09-25 11:25:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-09-25 11:25:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1003 transitions. [2020-09-25 11:25:50,320 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1003 transitions. Word has length 59 [2020-09-25 11:25:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:50,320 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1003 transitions. [2020-09-25 11:25:50,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:25:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1003 transitions. [2020-09-25 11:25:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:50,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:50,322 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:50,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-25 11:25:50,323 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:50,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2112571323, now seen corresponding path program 4 times [2020-09-25 11:25:50,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:50,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146469601] [2020-09-25 11:25:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:50,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:51,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:51,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:25:51,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:51,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1540 [2020-09-25 11:25:51,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:51,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:51,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:25:51,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:25:51,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:25:51,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:51,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:51,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:51,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:51,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:51,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:51,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:51,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:51,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:51,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:51,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146469601] [2020-09-25 11:25:51,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:51,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:25:51,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600929276] [2020-09-25 11:25:51,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:25:51,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:25:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:25:51,974 INFO L87 Difference]: Start difference. First operand 821 states and 1003 transitions. Second operand 10 states. [2020-09-25 11:25:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:52,345 INFO L93 Difference]: Finished difference Result 1082 states and 1306 transitions. [2020-09-25 11:25:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:25:52,346 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 11:25:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:52,351 INFO L225 Difference]: With dead ends: 1082 [2020-09-25 11:25:52,351 INFO L226 Difference]: Without dead ends: 1080 [2020-09-25 11:25:52,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:25:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2020-09-25 11:25:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 873. [2020-09-25 11:25:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-09-25 11:25:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1067 transitions. [2020-09-25 11:25:52,391 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1067 transitions. Word has length 59 [2020-09-25 11:25:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:52,391 INFO L479 AbstractCegarLoop]: Abstraction has 873 states and 1067 transitions. [2020-09-25 11:25:52,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:25:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1067 transitions. [2020-09-25 11:25:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:25:52,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:52,393 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:52,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-25 11:25:52,393 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:52,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash 616502515, now seen corresponding path program 6 times [2020-09-25 11:25:52,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:52,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865227787] [2020-09-25 11:25:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:52,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:52,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:52,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:52,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:52,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking...