/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem01_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:41:47,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:41:47,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:41:47,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:41:47,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:41:47,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:41:47,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:41:47,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:41:47,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:41:47,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:41:47,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:41:47,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:41:47,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:41:47,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:41:47,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:41:47,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:41:47,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:41:47,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:41:47,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:41:47,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:41:47,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:41:47,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:41:47,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:41:47,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:41:47,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:41:47,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:41:47,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:41:47,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:41:47,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:41:47,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:41:47,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:41:47,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:41:47,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:41:47,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:41:47,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:41:47,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:41:47,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:41:47,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:41:47,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:41:47,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:41:47,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:41:47,515 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 06:41:47,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:41:47,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:41:47,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:41:47,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:41:47,576 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:41:47,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:41:47,576 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:41:47,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:41:47,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:41:47,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:41:47,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:41:47,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:41:47,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:41:47,580 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:41:47,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:41:47,580 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:41:47,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:41:47,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:41:47,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:41:47,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:41:47,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:41:47,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:41:47,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:41:47,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:41:47,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:41:47,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:41:47,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:41:47,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:41:47,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:41:47,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:41:48,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:41:48,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:41:48,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:41:48,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:41:48,085 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:41:48,086 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label06.c [2020-09-25 06:41:48,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06c5e52eb/83244c2717f44d12974453cc67b436eb/FLAGab0ef4449 [2020-09-25 06:41:48,783 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:41:48,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label06.c [2020-09-25 06:41:48,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06c5e52eb/83244c2717f44d12974453cc67b436eb/FLAGab0ef4449 [2020-09-25 06:41:49,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06c5e52eb/83244c2717f44d12974453cc67b436eb [2020-09-25 06:41:49,046 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:41:49,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:41:49,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:41:49,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:41:49,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:41:49,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:49,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49, skipping insertion in model container [2020-09-25 06:41:49,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:49,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:41:49,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:41:49,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:41:49,595 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:41:49,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:41:49,851 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:41:49,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49 WrapperNode [2020-09-25 06:41:49,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:41:49,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:41:49,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:41:49,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:41:49,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:49,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:49,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:49,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:49,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:49,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:49,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (1/1) ... [2020-09-25 06:41:50,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:41:50,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:41:50,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:41:50,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:41:50,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:41:50,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:41:50,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:41:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 06:41:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 06:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 06:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:41:51,449 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:41:51,450 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 06:41:51,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:41:51 BoogieIcfgContainer [2020-09-25 06:41:51,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:41:51,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:41:51,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:41:51,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:41:51,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:41:49" (1/3) ... [2020-09-25 06:41:51,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501e69ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:41:51, skipping insertion in model container [2020-09-25 06:41:51,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:41:49" (2/3) ... [2020-09-25 06:41:51,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501e69ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:41:51, skipping insertion in model container [2020-09-25 06:41:51,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:41:51" (3/3) ... [2020-09-25 06:41:51,468 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label06.c [2020-09-25 06:41:51,480 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:41:51,491 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:41:51,514 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:41:51,547 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:41:51,548 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:41:51,548 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:41:51,548 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:41:51,548 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:41:51,548 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:41:51,548 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:41:51,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:41:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 06:41:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 06:41:51,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:41:51,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:41:51,610 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:41:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:41:51,619 INFO L82 PathProgramCache]: Analyzing trace with hash 730138415, now seen corresponding path program 1 times [2020-09-25 06:41:51,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:41:51,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485969589] [2020-09-25 06:41:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:41:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:52,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:52,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:53,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:54,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:55,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:56,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:56,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:56,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-09-25 06:41:56,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:41:56,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 06:41:56,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:56,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:56,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:41:56,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:41:56,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-25 06:41:56,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:41:57,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:41:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:57,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:57,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:57,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:41:57,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:57,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 06:41:57,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:57,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:41:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:41:57,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 06:41:57,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:41:57,405 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 06:41:57,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485969589] [2020-09-25 06:41:57,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:41:57,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:41:57,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241520962] [2020-09-25 06:41:57,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:41:57,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:41:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:41:57,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:41:57,442 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 06:41:59,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:41:59,568 INFO L93 Difference]: Finished difference Result 1340 states and 1738 transitions. [2020-09-25 06:41:59,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:41:59,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-09-25 06:41:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:41:59,610 INFO L225 Difference]: With dead ends: 1340 [2020-09-25 06:41:59,610 INFO L226 Difference]: Without dead ends: 741 [2020-09-25 06:41:59,619 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 06:41:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-09-25 06:41:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 664. [2020-09-25 06:41:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-09-25 06:41:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 780 transitions. [2020-09-25 06:41:59,722 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 780 transitions. Word has length 152 [2020-09-25 06:41:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:41:59,723 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 780 transitions. [2020-09-25 06:41:59,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:41:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 780 transitions. [2020-09-25 06:41:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 06:41:59,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:41:59,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:41:59,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:41:59,732 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:41:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:41:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1669034880, now seen corresponding path program 1 times [2020-09-25 06:41:59,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:41:59,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315108723] [2020-09-25 06:41:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:41:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:59,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:59,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:59,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:00,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:00,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:00,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:02,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:04,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:04,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-25 06:42:04,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:42:04,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 06:42:04,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:04,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:42:04,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 06:42:04,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 06:42:04,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:04,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:42:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:04,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:05,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:05,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:42:05,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:05,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 06:42:05,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:05,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:05,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:42:05,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:05,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:42:05,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:05,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:42:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:05,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:05,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:05,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 06:42:05,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:05,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 06:42:05,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:05,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:05,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:42:05,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:05,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 06:42:05,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:42:05,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315108723] [2020-09-25 06:42:05,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:42:05,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 06:42:05,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726392721] [2020-09-25 06:42:05,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 06:42:05,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:42:05,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 06:42:05,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-25 06:42:05,336 INFO L87 Difference]: Start difference. First operand 664 states and 780 transitions. Second operand 9 states. [2020-09-25 06:42:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:42:10,196 INFO L93 Difference]: Finished difference Result 2178 states and 2848 transitions. [2020-09-25 06:42:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 06:42:10,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 173 [2020-09-25 06:42:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:42:10,209 INFO L225 Difference]: With dead ends: 2178 [2020-09-25 06:42:10,210 INFO L226 Difference]: Without dead ends: 1100 [2020-09-25 06:42:10,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-09-25 06:42:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-09-25 06:42:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1064. [2020-09-25 06:42:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-09-25 06:42:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1200 transitions. [2020-09-25 06:42:10,281 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1200 transitions. Word has length 173 [2020-09-25 06:42:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:42:10,282 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1200 transitions. [2020-09-25 06:42:10,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 06:42:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1200 transitions. [2020-09-25 06:42:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-25 06:42:10,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:42:10,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:42:10,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:42:10,292 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:42:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:42:10,292 INFO L82 PathProgramCache]: Analyzing trace with hash -139356601, now seen corresponding path program 1 times [2020-09-25 06:42:10,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:42:10,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723133369] [2020-09-25 06:42:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:42:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:10,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:10,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:10,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:11,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:14,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:15,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:15,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-09-25 06:42:15,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:42:15,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 06:42:15,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:15,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:42:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-25 06:42:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 06:42:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:15,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:42:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:15,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:15,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:15,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:42:15,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:15,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 06:42:15,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:15,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:42:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:42:15,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:15,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:42:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:15,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:15,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:15,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 06:42:15,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 06:42:15,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:15,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:42:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 06:42:15,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:42:15,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723133369] [2020-09-25 06:42:15,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:42:15,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 06:42:15,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438054781] [2020-09-25 06:42:15,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:42:15,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:42:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:42:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:42:15,639 INFO L87 Difference]: Start difference. First operand 1064 states and 1200 transitions. Second operand 5 states. [2020-09-25 06:42:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:42:17,352 INFO L93 Difference]: Finished difference Result 2456 states and 2855 transitions. [2020-09-25 06:42:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:42:17,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-09-25 06:42:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:42:17,360 INFO L225 Difference]: With dead ends: 2456 [2020-09-25 06:42:17,360 INFO L226 Difference]: Without dead ends: 1416 [2020-09-25 06:42:17,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:42:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2020-09-25 06:42:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1352. [2020-09-25 06:42:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-09-25 06:42:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1563 transitions. [2020-09-25 06:42:17,405 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1563 transitions. Word has length 178 [2020-09-25 06:42:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:42:17,405 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1563 transitions. [2020-09-25 06:42:17,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:42:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1563 transitions. [2020-09-25 06:42:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-25 06:42:17,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:42:17,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:42:17,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:42:17,412 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:42:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:42:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash -114572164, now seen corresponding path program 1 times [2020-09-25 06:42:17,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:42:17,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904395542] [2020-09-25 06:42:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:42:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:17,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:17,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:18,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:19,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:19,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:20,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:22,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:22,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-25 06:42:22,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:42:22,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 06:42:22,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:22,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:42:22,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:42:22,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 06:42:22,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:42:22,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:42:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:22,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:22,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:22,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:42:22,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:22,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 06:42:22,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:22,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:22,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:42:22,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 06:42:22,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:22,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:42:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:22,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:22,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:22,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 06:42:22,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:22,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 06:42:22,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:22,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:42:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:42:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:42:22,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:22,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 06:42:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:22,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:22,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:22,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:42:22,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:22,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:42:22,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:22,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:42:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:42:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:42:22,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 06:42:22,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904395542] [2020-09-25 06:42:22,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:42:22,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:42:22,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191017781] [2020-09-25 06:42:22,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:42:22,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:42:22,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:42:22,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:42:22,764 INFO L87 Difference]: Start difference. First operand 1352 states and 1563 transitions. Second operand 7 states. [2020-09-25 06:42:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:42:24,747 INFO L93 Difference]: Finished difference Result 3669 states and 4403 transitions. [2020-09-25 06:42:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 06:42:24,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2020-09-25 06:42:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:42:24,760 INFO L225 Difference]: With dead ends: 3669 [2020-09-25 06:42:24,760 INFO L226 Difference]: Without dead ends: 2341 [2020-09-25 06:42:24,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:42:24,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2020-09-25 06:42:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2252. [2020-09-25 06:42:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2252 states. [2020-09-25 06:42:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 2640 transitions. [2020-09-25 06:42:24,836 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 2640 transitions. Word has length 197 [2020-09-25 06:42:24,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:42:24,837 INFO L479 AbstractCegarLoop]: Abstraction has 2252 states and 2640 transitions. [2020-09-25 06:42:24,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:42:24,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 2640 transitions. [2020-09-25 06:42:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-25 06:42:24,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:42:24,848 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:42:24,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:42:24,848 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:42:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:42:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1549260369, now seen corresponding path program 1 times [2020-09-25 06:42:24,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:42:24,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803001526] [2020-09-25 06:42:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:42:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:24,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:24,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:25,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:25,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:25,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:26,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:26,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:26,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:26,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:29,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:29,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-09-25 06:42:29,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 06:42:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 06:42:29,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:29,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 06:42:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 06:42:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 06:42:29,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:29,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:42:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:30,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:30,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:42:30,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:30,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 06:42:30,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:30,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:42:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:42:30,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:42:30,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:42:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:30,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:30,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:30,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:42:30,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:30,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 06:42:30,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:30,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:42:30,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:30,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:42:30,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:42:30,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-25 06:42:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:30,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:30,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:30,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 06:42:30,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:30,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 06:42:30,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:30,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:42:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:42:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:42:30,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:30,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-25 06:42:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:30,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:30,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:30,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:42:30,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:30,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:42:30,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:30,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:30,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:42:30,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:42:30,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:42:30,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:42:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 06:42:30,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803001526] [2020-09-25 06:42:30,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:42:30,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:42:30,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811396768] [2020-09-25 06:42:30,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:42:30,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:42:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:42:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:42:30,254 INFO L87 Difference]: Start difference. First operand 2252 states and 2640 transitions. Second operand 8 states. [2020-09-25 06:42:30,972 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-25 06:42:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:42:32,879 INFO L93 Difference]: Finished difference Result 5355 states and 6418 transitions. [2020-09-25 06:42:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 06:42:32,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 226 [2020-09-25 06:42:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:42:32,899 INFO L225 Difference]: With dead ends: 5355 [2020-09-25 06:42:32,900 INFO L226 Difference]: Without dead ends: 3127 [2020-09-25 06:42:32,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-25 06:42:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2020-09-25 06:42:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 3066. [2020-09-25 06:42:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3066 states. [2020-09-25 06:42:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 3586 transitions. [2020-09-25 06:42:33,002 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 3586 transitions. Word has length 226 [2020-09-25 06:42:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:42:33,004 INFO L479 AbstractCegarLoop]: Abstraction has 3066 states and 3586 transitions. [2020-09-25 06:42:33,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:42:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 3586 transitions. [2020-09-25 06:42:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-25 06:42:33,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:42:33,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:42:33,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:42:33,016 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:42:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:42:33,016 INFO L82 PathProgramCache]: Analyzing trace with hash -516660374, now seen corresponding path program 1 times [2020-09-25 06:42:33,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:42:33,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312983979] [2020-09-25 06:42:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:42:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:33,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:33,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:33,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:33,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:33,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:38,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:38,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-09-25 06:42:38,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 06:42:38,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 06:42:38,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:38,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:42:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-25 06:42:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 06:42:38,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:42:38,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:42:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:38,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:38,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:38,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:42:38,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:38,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 06:42:38,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:38,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:42:38,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:38,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:42:38,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:38,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:42:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:38,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:38,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:38,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:42:38,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:38,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 06:42:38,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:38,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:38,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:42:38,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:42:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 06:42:38,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:38,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-25 06:42:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:38,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:38,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 06:42:38,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:38,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 06:42:38,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:38,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:38,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:42:38,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:42:38,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 06:42:38,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:38,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-25 06:42:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:38,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:38,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:42:38,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:42:38,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:42:38,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:42:38,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:42:38,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:42:38,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:42:38,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:42:38,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:42:38,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:42:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 06:42:38,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312983979] [2020-09-25 06:42:38,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:42:38,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:42:38,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260124127] [2020-09-25 06:42:38,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:42:38,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:42:38,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:42:38,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:42:38,483 INFO L87 Difference]: Start difference. First operand 3066 states and 3586 transitions. Second operand 7 states.