/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=1.0 --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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:02:47,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:02:47,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:02:47,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:02:47,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:02:47,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:02:47,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:02:47,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:02:47,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:02:47,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:02:47,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:02:47,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:02:47,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:02:47,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:02:48,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:02:48,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:02:48,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:02:48,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:02:48,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:02:48,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:02:48,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:02:48,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:02:48,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:02:48,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:02:48,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:02:48,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:02:48,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:02:48,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:02:48,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:02:48,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:02:48,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:02:48,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:02:48,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:02:48,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:02:48,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:02:48,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:02:48,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:02:48,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:02:48,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:02:48,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:02:48,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:02:48,058 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 09:02:48,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:02:48,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:02:48,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:02:48,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:02:48,102 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:02:48,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:02:48,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:02:48,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:02:48,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:02:48,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:02:48,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:02:48,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:02:48,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:02:48,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:02:48,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:02:48,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:02:48,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:02:48,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:02:48,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:02:48,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:02:48,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:02:48,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:02:48,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:02:48,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:02:48,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:02:48,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:02:48,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:02:48,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:02:48,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:02:48,113 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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-09-25 09:02:48,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:02:48,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:02:48,582 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:02:48,584 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:02:48,585 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:02:48,586 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label27.c [2020-09-25 09:02:48,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2600eb1b0/12ac15b444544f37a2d4559aff126ee4/FLAG01b3dc7ee [2020-09-25 09:02:49,349 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:02:49,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label27.c [2020-09-25 09:02:49,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2600eb1b0/12ac15b444544f37a2d4559aff126ee4/FLAG01b3dc7ee [2020-09-25 09:02:49,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2600eb1b0/12ac15b444544f37a2d4559aff126ee4 [2020-09-25 09:02:49,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:02:49,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:02:49,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:02:49,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:02:49,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:02:49,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:02:49" (1/1) ... [2020-09-25 09:02:49,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1abca0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:49, skipping insertion in model container [2020-09-25 09:02:49,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:02:49" (1/1) ... [2020-09-25 09:02:49,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:02:49,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:02:50,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:02:50,296 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:02:50,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:02:50,449 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:02:50,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50 WrapperNode [2020-09-25 09:02:50,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:02:50,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:02:50,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:02:50,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:02:50,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (1/1) ... [2020-09-25 09:02:50,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (1/1) ... [2020-09-25 09:02:50,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (1/1) ... [2020-09-25 09:02:50,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (1/1) ... [2020-09-25 09:02:50,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (1/1) ... [2020-09-25 09:02:50,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (1/1) ... [2020-09-25 09:02:50,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (1/1) ... [2020-09-25 09:02:50,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:02:50,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:02:50,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:02:50,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:02:50,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (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 09:02:50,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:02:50,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:02:50,670 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 09:02:50,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:02:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 09:02:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:02:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:02:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 09:02:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:02:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:02:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:02:52,078 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:02:52,079 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:02:52,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:02:52 BoogieIcfgContainer [2020-09-25 09:02:52,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:02:52,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:02:52,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:02:52,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:02:52,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:02:49" (1/3) ... [2020-09-25 09:02:52,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ae0c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:02:52, skipping insertion in model container [2020-09-25 09:02:52,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:02:50" (2/3) ... [2020-09-25 09:02:52,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ae0c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:02:52, skipping insertion in model container [2020-09-25 09:02:52,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:02:52" (3/3) ... [2020-09-25 09:02:52,105 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label27.c [2020-09-25 09:02:52,117 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:02:52,133 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:02:52,156 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:02:52,201 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:02:52,202 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:02:52,202 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:02:52,203 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:02:52,203 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:02:52,203 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:02:52,203 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:02:52,203 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:02:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 09:02:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-25 09:02:52,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:02:52,265 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] [2020-09-25 09:02:52,266 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:02:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:02:52,275 INFO L82 PathProgramCache]: Analyzing trace with hash 38595514, now seen corresponding path program 1 times [2020-09-25 09:02:52,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:02:52,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307636152] [2020-09-25 09:02:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:02:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:52,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:52,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:53,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:54,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:57,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:57,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-09-25 09:02:57,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:02:57,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-25 09:02:57,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:57,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:02:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:02:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-25 09:02:57,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:02:57,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:02:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:57,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:57,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:02:57,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:02:57,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 09:02:57,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:57,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:02:57,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:02:57,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:02:57,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:57,835 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 09:02:57,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307636152] [2020-09-25 09:02:57,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:02:57,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:02:57,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340448482] [2020-09-25 09:02:57,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:02:57,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:02:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:02:57,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:02:57,872 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 09:03:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:00,211 INFO L93 Difference]: Finished difference Result 1396 states and 1850 transitions. [2020-09-25 09:03:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:03:00,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2020-09-25 09:03:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:00,248 INFO L225 Difference]: With dead ends: 1396 [2020-09-25 09:03:00,249 INFO L226 Difference]: Without dead ends: 788 [2020-09-25 09:03:00,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 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 09:03:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-09-25 09:03:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 665. [2020-09-25 09:03:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-09-25 09:03:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 813 transitions. [2020-09-25 09:03:00,397 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 813 transitions. Word has length 121 [2020-09-25 09:03:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:00,399 INFO L479 AbstractCegarLoop]: Abstraction has 665 states and 813 transitions. [2020-09-25 09:03:00,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:03:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 813 transitions. [2020-09-25 09:03:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-25 09:03:00,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:00,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:00,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:03:00,417 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1106634726, now seen corresponding path program 1 times [2020-09-25 09:03:00,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:00,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408246170] [2020-09-25 09:03:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:00,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:00,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:01,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:02,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:03,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:03,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:05,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:05,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:05,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-25 09:03:05,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:03:05,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 09:03:05,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:05,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:03:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 09:03:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-25 09:03:05,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:05,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:05,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:05,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:05,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:05,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:05,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 09:03:05,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:05,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 09:03:05,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:05,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:05,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:05,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:05,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:05,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 09:03:05,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:03:05,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 09:03:05,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:05,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:03:05,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 09:03:05,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408246170] [2020-09-25 09:03:05,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:05,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:03:05,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609281172] [2020-09-25 09:03:05,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:03:05,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:05,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:03:05,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:03:05,770 INFO L87 Difference]: Start difference. First operand 665 states and 813 transitions. Second operand 7 states. [2020-09-25 09:03:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:08,334 INFO L93 Difference]: Finished difference Result 1799 states and 2361 transitions. [2020-09-25 09:03:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:03:08,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-09-25 09:03:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:08,348 INFO L225 Difference]: With dead ends: 1799 [2020-09-25 09:03:08,349 INFO L226 Difference]: Without dead ends: 1156 [2020-09-25 09:03:08,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:03:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2020-09-25 09:03:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1124. [2020-09-25 09:03:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2020-09-25 09:03:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1474 transitions. [2020-09-25 09:03:08,408 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1474 transitions. Word has length 139 [2020-09-25 09:03:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:08,409 INFO L479 AbstractCegarLoop]: Abstraction has 1124 states and 1474 transitions. [2020-09-25 09:03:08,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:03:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1474 transitions. [2020-09-25 09:03:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-25 09:03:08,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:08,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:08,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:03:08,417 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1692622194, now seen corresponding path program 1 times [2020-09-25 09:03:08,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:08,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333113274] [2020-09-25 09:03:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:08,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:08,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:08,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:10,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:10,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:11,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:11,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:13,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-09-25 09:03:13,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:03:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 09:03:13,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:13,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-09-25 09:03:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 09:03:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:13,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:13,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:13,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:13,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:13,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:03:13,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:13,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:13,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:13,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:13,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:13,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:13,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:13,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:13,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:13,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 09:03:13,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:13,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 09:03:13,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:13,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 09:03:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:03:13,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333113274] [2020-09-25 09:03:13,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:13,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:03:13,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405990297] [2020-09-25 09:03:13,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:03:13,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:03:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:03:13,699 INFO L87 Difference]: Start difference. First operand 1124 states and 1474 transitions. Second operand 5 states. [2020-09-25 09:03:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:15,729 INFO L93 Difference]: Finished difference Result 2846 states and 3852 transitions. [2020-09-25 09:03:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:03:15,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-09-25 09:03:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:15,756 INFO L225 Difference]: With dead ends: 2846 [2020-09-25 09:03:15,760 INFO L226 Difference]: Without dead ends: 1363 [2020-09-25 09:03:15,768 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 09:03:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2020-09-25 09:03:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1200. [2020-09-25 09:03:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2020-09-25 09:03:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1456 transitions. [2020-09-25 09:03:15,838 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1456 transitions. Word has length 159 [2020-09-25 09:03:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:15,839 INFO L479 AbstractCegarLoop]: Abstraction has 1200 states and 1456 transitions. [2020-09-25 09:03:15,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:03:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1456 transitions. [2020-09-25 09:03:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-25 09:03:15,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:15,847 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] [2020-09-25 09:03:15,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:03:15,854 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1145838343, now seen corresponding path program 1 times [2020-09-25 09:03:15,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:15,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950385949] [2020-09-25 09:03:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:15,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:18,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:18,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-25 09:03:18,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:03:18,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2160 [2020-09-25 09:03:18,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:18,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:03:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 09:03:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 09:03:18,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:18,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:18,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:18,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:18,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:18,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:18,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 09:03:18,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:18,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:18,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:18,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:18,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:03:18,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:18,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:18,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:18,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:18,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 09:03:18,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:18,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-25 09:03:18,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:18,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:18,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 09:03:18,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:18,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 09:03:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:18,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:18,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:18,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 09:03:18,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:18,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 09:03:18,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:18,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:18,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:18,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:03:18,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:18,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:18,561 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 09:03:18,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950385949] [2020-09-25 09:03:18,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:18,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:03:18,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561617851] [2020-09-25 09:03:18,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:03:18,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:03:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:03:18,568 INFO L87 Difference]: Start difference. First operand 1200 states and 1456 transitions. Second operand 7 states. [2020-09-25 09:03:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:20,625 INFO L93 Difference]: Finished difference Result 3166 states and 3949 transitions. [2020-09-25 09:03:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 09:03:20,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 185 [2020-09-25 09:03:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:20,638 INFO L225 Difference]: With dead ends: 3166 [2020-09-25 09:03:20,639 INFO L226 Difference]: Without dead ends: 1988 [2020-09-25 09:03:20,644 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 09:03:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2020-09-25 09:03:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1672. [2020-09-25 09:03:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-25 09:03:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2043 transitions. [2020-09-25 09:03:20,707 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2043 transitions. Word has length 185 [2020-09-25 09:03:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:20,707 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2043 transitions. [2020-09-25 09:03:20,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:03:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2043 transitions. [2020-09-25 09:03:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-09-25 09:03:20,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:20,715 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, 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] [2020-09-25 09:03:20,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:03:20,715 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash -411719777, now seen corresponding path program 1 times [2020-09-25 09:03:20,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:20,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155960065] [2020-09-25 09:03:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:20,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:22,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:22,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-09-25 09:03:22,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:03:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-09-25 09:03:22,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:22,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:03:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:03:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 09:03:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:23,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:23,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:23,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:23,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:23,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:23,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 09:03:23,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:23,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:23,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 09:03:23,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:03:23,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:23,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:23,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 09:03:23,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-25 09:03:23,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:23,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 09:03:23,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:23,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-25 09:03:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:23,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:23,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 09:03:23,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 09:03:23,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:23,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:03:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:23,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 09:03:23,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155960065] [2020-09-25 09:03:23,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:23,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:03:23,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927629288] [2020-09-25 09:03:23,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:03:23,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:23,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:03:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:03:23,334 INFO L87 Difference]: Start difference. First operand 1672 states and 2043 transitions. Second operand 7 states. [2020-09-25 09:03:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:25,734 INFO L93 Difference]: Finished difference Result 4157 states and 5161 transitions. [2020-09-25 09:03:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:03:25,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 193 [2020-09-25 09:03:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:25,751 INFO L225 Difference]: With dead ends: 4157 [2020-09-25 09:03:25,752 INFO L226 Difference]: Without dead ends: 2507 [2020-09-25 09:03:25,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:03:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2020-09-25 09:03:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2459. [2020-09-25 09:03:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2459 states. [2020-09-25 09:03:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 2899 transitions. [2020-09-25 09:03:25,829 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 2899 transitions. Word has length 193 [2020-09-25 09:03:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:25,829 INFO L479 AbstractCegarLoop]: Abstraction has 2459 states and 2899 transitions. [2020-09-25 09:03:25,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:03:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 2899 transitions. [2020-09-25 09:03:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-09-25 09:03:25,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:25,838 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] [2020-09-25 09:03:25,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:03:25,839 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1125027324, now seen corresponding path program 1 times [2020-09-25 09:03:25,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:25,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42389399] [2020-09-25 09:03:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:25,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:26,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:26,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:27,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:27,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-25 09:03:27,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:03:27,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1460 [2020-09-25 09:03:27,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:27,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:27,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:03:27,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-09-25 09:03:27,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-09-25 09:03:27,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:27,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:27,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:27,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:27,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:27,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:27,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:03:27,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:27,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:27,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:27,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:27,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:27,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:27,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:27,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:27,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:27,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 09:03:27,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:27,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 09:03:27,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:27,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:27,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:27,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:27,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 09:03:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:27,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:27,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:27,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 09:03:27,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:27,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 09:03:27,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:27,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:27,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:27,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:27,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 09:03:27,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:27,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-25 09:03:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:27,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:27,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:27,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 09:03:27,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:03:27,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-25 09:03:27,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:27,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:27,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:27,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:27,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 09:03:27,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:03:27,761 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 09:03:27,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42389399] [2020-09-25 09:03:27,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:27,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:03:27,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96548853] [2020-09-25 09:03:27,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:03:27,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:03:27,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:03:27,764 INFO L87 Difference]: Start difference. First operand 2459 states and 2899 transitions. Second operand 7 states. [2020-09-25 09:03:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:30,466 INFO L93 Difference]: Finished difference Result 6100 states and 7141 transitions. [2020-09-25 09:03:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:03:30,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-09-25 09:03:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:30,491 INFO L225 Difference]: With dead ends: 6100 [2020-09-25 09:03:30,491 INFO L226 Difference]: Without dead ends: 3341 [2020-09-25 09:03:30,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:03:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2020-09-25 09:03:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2433. [2020-09-25 09:03:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2020-09-25 09:03:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 2757 transitions. [2020-09-25 09:03:30,597 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 2757 transitions. Word has length 203 [2020-09-25 09:03:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:30,598 INFO L479 AbstractCegarLoop]: Abstraction has 2433 states and 2757 transitions. [2020-09-25 09:03:30,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:03:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 2757 transitions. [2020-09-25 09:03:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-25 09:03:30,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:30,607 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:30,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:03:30,607 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2017885958, now seen corresponding path program 1 times [2020-09-25 09:03:30,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:30,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874259130] [2020-09-25 09:03:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:30,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:30,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:32,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:32,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-09-25 09:03:32,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:03:32,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1540 [2020-09-25 09:03:32,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:32,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 09:03:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 09:03:32,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:32,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:32,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:32,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:32,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:32,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:32,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:03:32,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:32,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:32,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:32,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:32,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:32,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:32,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:32,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:03:32,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:32,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 09:03:32,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:32,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:03:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:32,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:32,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:32,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 09:03:32,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:32,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-25 09:03:32,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:32,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:32,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:32,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:32,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 09:03:32,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:32,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-25 09:03:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:32,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:32,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:32,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 09:03:32,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:32,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 09:03:32,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:32,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:32,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:32,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:03:32,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:32,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 84 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-25 09:03:32,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874259130] [2020-09-25 09:03:32,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:32,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:03:32,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407037435] [2020-09-25 09:03:32,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:03:32,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:03:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:03:32,509 INFO L87 Difference]: Start difference. First operand 2433 states and 2757 transitions. Second operand 7 states. [2020-09-25 09:03:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:34,508 INFO L93 Difference]: Finished difference Result 5781 states and 6670 transitions. [2020-09-25 09:03:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:03:34,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 210 [2020-09-25 09:03:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:34,526 INFO L225 Difference]: With dead ends: 5781 [2020-09-25 09:03:34,526 INFO L226 Difference]: Without dead ends: 3370 [2020-09-25 09:03:34,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:03:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2020-09-25 09:03:34,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2741. [2020-09-25 09:03:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2741 states. [2020-09-25 09:03:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 3135 transitions. [2020-09-25 09:03:34,611 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 3135 transitions. Word has length 210 [2020-09-25 09:03:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:34,612 INFO L479 AbstractCegarLoop]: Abstraction has 2741 states and 3135 transitions. [2020-09-25 09:03:34,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:03:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 3135 transitions. [2020-09-25 09:03:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-25 09:03:34,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:34,621 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, 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] [2020-09-25 09:03:34,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:03:34,622 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:34,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:34,622 INFO L82 PathProgramCache]: Analyzing trace with hash -329546243, now seen corresponding path program 1 times [2020-09-25 09:03:34,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:34,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401698017] [2020-09-25 09:03:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:34,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:34,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:36,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:36,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-09-25 09:03:36,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:03:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1458 [2020-09-25 09:03:36,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:36,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 09:03:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 09:03:36,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:36,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:36,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:36,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:36,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:36,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:36,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:03:36,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:36,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:36,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:36,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:36,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:36,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:36,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:36,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:36,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:36,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 09:03:36,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:36,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 09:03:36,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:36,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:36,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:36,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:36,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 09:03:36,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:36,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 09:03:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:36,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:36,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:36,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 09:03:36,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:36,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 09:03:36,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:36,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:36,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:36,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:36,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 09:03:36,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:36,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-25 09:03:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:36,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:36,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:36,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 09:03:36,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:36,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 09:03:36,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:36,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:36,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:03:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:36,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 92 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-25 09:03:36,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401698017] [2020-09-25 09:03:36,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:36,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:03:36,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066938371] [2020-09-25 09:03:36,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:03:36,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:36,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:03:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:03:36,469 INFO L87 Difference]: Start difference. First operand 2741 states and 3135 transitions. Second operand 7 states.