/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:53:55,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:53:55,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:53:55,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:53:55,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:53:55,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:53:55,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:53:55,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:53:55,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:53:55,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:53:55,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:53:55,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:53:55,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:53:55,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:53:55,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:53:55,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:53:55,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:53:55,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:53:55,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:53:55,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:53:55,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:53:55,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:53:55,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:53:55,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:53:55,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:53:55,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:53:55,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:53:55,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:53:55,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:53:55,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:53:55,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:53:55,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:53:55,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:53:55,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:53:55,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:53:55,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:53:55,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:53:55,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:53:55,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:53:55,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:53:55,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:53:55,284 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 07:53:55,309 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:53:55,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:53:55,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:53:55,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:53:55,311 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:53:55,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:53:55,312 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:53:55,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:53:55,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:53:55,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:53:55,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:53:55,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:53:55,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:53:55,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:53:55,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:53:55,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:53:55,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:53:55,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:53:55,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:53:55,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:53:55,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:53:55,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:53:55,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:53:55,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:53:55,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:53:55,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:53:55,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:53:55,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:53:55,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:53:55,317 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:53:55,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:53:55,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:53:55,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:53:55,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:53:55,803 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:53:55,804 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2020-09-25 07:53:55,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2ba6455/53c5078c5b3d463aa1e2c2b35a76a43b/FLAG1bf146323 [2020-09-25 07:53:56,602 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:53:56,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2020-09-25 07:53:56,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2ba6455/53c5078c5b3d463aa1e2c2b35a76a43b/FLAG1bf146323 [2020-09-25 07:53:56,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2ba6455/53c5078c5b3d463aa1e2c2b35a76a43b [2020-09-25 07:53:56,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:53:56,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:53:56,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:53:56,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:53:56,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:53:56,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:53:56" (1/1) ... [2020-09-25 07:53:56,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88af870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:56, skipping insertion in model container [2020-09-25 07:53:56,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:53:56" (1/1) ... [2020-09-25 07:53:56,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:53:56,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:53:57,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:53:57,402 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:53:57,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:53:57,641 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:53:57,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57 WrapperNode [2020-09-25 07:53:57,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:53:57,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:53:57,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:53:57,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:53:57,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (1/1) ... [2020-09-25 07:53:57,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (1/1) ... [2020-09-25 07:53:57,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (1/1) ... [2020-09-25 07:53:57,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (1/1) ... [2020-09-25 07:53:57,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (1/1) ... [2020-09-25 07:53:57,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (1/1) ... [2020-09-25 07:53:57,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (1/1) ... [2020-09-25 07:53:57,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:53:57,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:53:57,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:53:57,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:53:57,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (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 07:53:57,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:53:57,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:53:57,881 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 07:53:57,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:53:57,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 07:53:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:53:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:53:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 07:53:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:53:57,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:53:57,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:53:59,231 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:53:59,231 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 07:53:59,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:53:59 BoogieIcfgContainer [2020-09-25 07:53:59,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:53:59,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:53:59,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:53:59,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:53:59,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:53:56" (1/3) ... [2020-09-25 07:53:59,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73de41d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:53:59, skipping insertion in model container [2020-09-25 07:53:59,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:57" (2/3) ... [2020-09-25 07:53:59,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73de41d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:53:59, skipping insertion in model container [2020-09-25 07:53:59,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:53:59" (3/3) ... [2020-09-25 07:53:59,252 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label28.c [2020-09-25 07:53:59,266 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:53:59,279 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:53:59,306 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:53:59,347 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:53:59,347 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:53:59,347 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:53:59,347 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:53:59,348 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:53:59,348 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:53:59,348 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:53:59,348 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:53:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 07:53:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-25 07:53:59,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:53:59,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:53:59,412 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:53:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:53:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1105966209, now seen corresponding path program 1 times [2020-09-25 07:53:59,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:53:59,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34633945] [2020-09-25 07:53:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:53:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:53:59,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:00,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:00,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:00,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:01,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:02,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:02,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:03,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:04,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:04,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-09-25 07:54:04,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 07:54:04,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 07:54:04,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:04,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:54:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:54:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-09-25 07:54:04,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 07:54:04,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:05,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:05,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:05,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:05,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:05,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 07:54:05,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:05,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:05,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 07:54:05,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:05,092 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 07:54:05,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34633945] [2020-09-25 07:54:05,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:54:05,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 07:54:05,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456182212] [2020-09-25 07:54:05,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 07:54:05,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 07:54:05,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:54:05,127 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 07:54:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:07,514 INFO L93 Difference]: Finished difference Result 1248 states and 1696 transitions. [2020-09-25 07:54:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 07:54:07,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-09-25 07:54:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:07,559 INFO L225 Difference]: With dead ends: 1248 [2020-09-25 07:54:07,559 INFO L226 Difference]: Without dead ends: 670 [2020-09-25 07:54:07,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-09-25 07:54:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 621. [2020-09-25 07:54:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 07:54:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 07:54:07,676 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 150 [2020-09-25 07:54:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:07,677 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 07:54:07,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 07:54:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 07:54:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-25 07:54:07,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:07,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:07,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:54:07,686 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash 93952890, now seen corresponding path program 1 times [2020-09-25 07:54:07,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:07,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336326660] [2020-09-25 07:54:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:07,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:07,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:07,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:08,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:08,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:09,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:12,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:12,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-25 07:54:12,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 07:54:12,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 07:54:12,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:12,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:12,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:12,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 07:54:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 07:54:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:12,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:12,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:12,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:12,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:12,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:12,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 07:54:12,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:12,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:12,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:12,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 07:54:12,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:12,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:12,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:12,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 07:54:12,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:12,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 07:54:12,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:12,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:12,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:12,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:12,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 07:54:12,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:54:13,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336326660] [2020-09-25 07:54:13,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:13,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:54:13,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466190223] [2020-09-25 07:54:13,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:54:13,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:54:13,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:13,055 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 07:54:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:15,077 INFO L93 Difference]: Finished difference Result 1533 states and 1847 transitions. [2020-09-25 07:54:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:54:15,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-09-25 07:54:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:15,084 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 07:54:15,084 INFO L226 Difference]: Without dead ends: 934 [2020-09-25 07:54:15,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:54:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-25 07:54:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 924. [2020-09-25 07:54:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2020-09-25 07:54:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1105 transitions. [2020-09-25 07:54:15,140 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1105 transitions. Word has length 167 [2020-09-25 07:54:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:15,142 INFO L479 AbstractCegarLoop]: Abstraction has 924 states and 1105 transitions. [2020-09-25 07:54:15,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:54:15,142 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1105 transitions. [2020-09-25 07:54:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-25 07:54:15,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:15,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:15,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:54:15,153 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1954637387, now seen corresponding path program 1 times [2020-09-25 07:54:15,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:15,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200858164] [2020-09-25 07:54:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:15,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:15,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:15,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:16,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:16,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:16,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:20,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:20,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-09-25 07:54:20,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 07:54:20,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 07:54:20,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:20,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:20,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:20,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 07:54:20,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 07:54:20,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:20,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:20,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:20,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:20,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:20,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 07:54:20,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:20,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:20,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:20,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:20,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:20,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 07:54:20,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:20,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 07:54:20,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:20,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:20,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:20,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:20,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 07:54:20,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:20,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 07:54:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:20,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:20,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:20,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:54:20,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:20,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 07:54:20,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:20,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:20,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:20,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 07:54:20,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 07:54:20,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:54:20,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200858164] [2020-09-25 07:54:20,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:20,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 07:54:20,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285064092] [2020-09-25 07:54:20,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 07:54:20,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:20,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 07:54:20,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:54:20,526 INFO L87 Difference]: Start difference. First operand 924 states and 1105 transitions. Second operand 7 states. [2020-09-25 07:54:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:23,001 INFO L93 Difference]: Finished difference Result 2417 states and 3013 transitions. [2020-09-25 07:54:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 07:54:23,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-09-25 07:54:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:23,016 INFO L225 Difference]: With dead ends: 2417 [2020-09-25 07:54:23,016 INFO L226 Difference]: Without dead ends: 1515 [2020-09-25 07:54:23,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:54:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-09-25 07:54:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1245. [2020-09-25 07:54:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1245 states. [2020-09-25 07:54:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1560 transitions. [2020-09-25 07:54:23,104 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1560 transitions. Word has length 201 [2020-09-25 07:54:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:23,106 INFO L479 AbstractCegarLoop]: Abstraction has 1245 states and 1560 transitions. [2020-09-25 07:54:23,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 07:54:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1560 transitions. [2020-09-25 07:54:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-25 07:54:23,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:23,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:23,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:54:23,114 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1129148194, now seen corresponding path program 1 times [2020-09-25 07:54:23,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:23,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874107509] [2020-09-25 07:54:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:23,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:23,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:26,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:26,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:28,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:28,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-09-25 07:54:28,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 07:54:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 07:54:28,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:28,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:28,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:28,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-09-25 07:54:28,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-25 07:54:28,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:28,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:28,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:28,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:28,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:28,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:28,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 07:54:28,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:28,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:28,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:28,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:28,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:28,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 07:54:28,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:28,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:28,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:28,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 07:54:28,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:28,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:54:28,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:28,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:28,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:28,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:28,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 07:54:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:28,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:28,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:28,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:54:28,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:28,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-25 07:54:28,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:28,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:28,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:28,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 07:54:28,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 07:54:28,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874107509] [2020-09-25 07:54:28,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:28,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:54:28,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804932206] [2020-09-25 07:54:28,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:54:28,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:28,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:54:28,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:28,641 INFO L87 Difference]: Start difference. First operand 1245 states and 1560 transitions. Second operand 5 states. [2020-09-25 07:54:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:30,718 INFO L93 Difference]: Finished difference Result 3238 states and 4216 transitions. [2020-09-25 07:54:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:54:30,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2020-09-25 07:54:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:30,730 INFO L225 Difference]: With dead ends: 3238 [2020-09-25 07:54:30,730 INFO L226 Difference]: Without dead ends: 1487 [2020-09-25 07:54:30,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:54:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2020-09-25 07:54:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1476. [2020-09-25 07:54:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1476 states. [2020-09-25 07:54:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1772 transitions. [2020-09-25 07:54:30,803 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1772 transitions. Word has length 206 [2020-09-25 07:54:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:30,804 INFO L479 AbstractCegarLoop]: Abstraction has 1476 states and 1772 transitions. [2020-09-25 07:54:30,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:54:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1772 transitions. [2020-09-25 07:54:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-09-25 07:54:30,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:30,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:30,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:54:30,811 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1481533534, now seen corresponding path program 1 times [2020-09-25 07:54:30,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:30,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734351663] [2020-09-25 07:54:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:30,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:30,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:31,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:31,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:32,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:35,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:35,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-09-25 07:54:35,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 07:54:35,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 07:54:35,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:35,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:35,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:54:35,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 07:54:35,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 07:54:35,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:35,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:35,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:35,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:35,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:35,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:35,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 07:54:35,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:35,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 07:54:35,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:35,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:36,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:36,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:36,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 07:54:36,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:36,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-25 07:54:36,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:36,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 07:54:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 07:54:36,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 07:54:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:36,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:36,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 07:54:36,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 07:54:36,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:36,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:54:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:36,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 07:54:36,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734351663] [2020-09-25 07:54:36,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:36,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 07:54:36,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371020597] [2020-09-25 07:54:36,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 07:54:36,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 07:54:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:54:36,253 INFO L87 Difference]: Start difference. First operand 1476 states and 1772 transitions. Second operand 7 states. [2020-09-25 07:54:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:38,311 INFO L93 Difference]: Finished difference Result 3711 states and 4574 transitions. [2020-09-25 07:54:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 07:54:38,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 214 [2020-09-25 07:54:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:38,328 INFO L225 Difference]: With dead ends: 3711 [2020-09-25 07:54:38,328 INFO L226 Difference]: Without dead ends: 2257 [2020-09-25 07:54:38,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 07:54:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2020-09-25 07:54:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2093. [2020-09-25 07:54:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2093 states. [2020-09-25 07:54:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2512 transitions. [2020-09-25 07:54:38,391 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2512 transitions. Word has length 214 [2020-09-25 07:54:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:38,392 INFO L479 AbstractCegarLoop]: Abstraction has 2093 states and 2512 transitions. [2020-09-25 07:54:38,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 07:54:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2512 transitions. [2020-09-25 07:54:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-09-25 07:54:38,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:38,402 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:38,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 07:54:38,402 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1300662903, now seen corresponding path program 1 times [2020-09-25 07:54:38,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:38,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611121691] [2020-09-25 07:54:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:38,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:38,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:39,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:39,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:40,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:41,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:41,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:42,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:42,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:42,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:42,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:43,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:43,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-09-25 07:54:43,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 07:54:43,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 07:54:43,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:43,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:54:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-09-25 07:54:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-09-25 07:54:43,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:43,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:43,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:43,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:43,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:43,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:43,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 07:54:43,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:43,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:43,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:43,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:43,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:43,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:43,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 07:54:43,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:43,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:54:43,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:43,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:43,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:43,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:43,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 07:54:43,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 07:54:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:43,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:43,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:43,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:54:43,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:43,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 07:54:43,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:43,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:43,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:43,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:43,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 07:54:43,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:43,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-25 07:54:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:43,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:43,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 07:54:43,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:54:43,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-25 07:54:43,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:43,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:43,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:43,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 07:54:43,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 07:54:43,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-25 07:54:43,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611121691] [2020-09-25 07:54:43,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:43,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 07:54:43,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53132292] [2020-09-25 07:54:43,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 07:54:43,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 07:54:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:54:43,873 INFO L87 Difference]: Start difference. First operand 2093 states and 2512 transitions. Second operand 7 states.