/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=SMALLEST --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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:20:32,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:20:32,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:20:32,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:20:32,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:20:32,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:20:32,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:20:32,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:20:32,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:20:32,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:20:32,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:20:32,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:20:32,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:20:32,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:20:32,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:20:32,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:20:32,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:20:32,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:20:32,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:20:32,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:20:32,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:20:32,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:20:32,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:20:32,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:20:32,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:20:32,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:20:32,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:20:32,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:20:32,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:20:32,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:20:32,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:20:32,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:20:32,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:20:32,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:20:32,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:20:32,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:20:32,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:20:32,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:20:32,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:20:32,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:20:32,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:20:32,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:20:32,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:20:32,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:20:32,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:20:32,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:20:32,571 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:20:32,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:20:32,572 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:20:32,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:20:32,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:20:32,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:20:32,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:20:32,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:20:32,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:20:32,574 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:20:32,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:20:32,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:20:32,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:20:32,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:20:32,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:20:32,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:20:32,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:20:32,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:20:32,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:20:32,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:20:32,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:20:32,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:20:32,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:20:32,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:20:32,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:20:32,578 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:20:33,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:20:33,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:20:33,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:20:33,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:20:33,051 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:20:33,052 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label52.c [2020-09-24 18:20:33,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ef0780da/b239f4defb34448fb29b9ffaf643444e/FLAG17e81159c [2020-09-24 18:20:33,861 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:20:33,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label52.c [2020-09-24 18:20:33,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ef0780da/b239f4defb34448fb29b9ffaf643444e/FLAG17e81159c [2020-09-24 18:20:34,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ef0780da/b239f4defb34448fb29b9ffaf643444e [2020-09-24 18:20:34,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:20:34,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:20:34,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:20:34,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:20:34,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:20:34,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34, skipping insertion in model container [2020-09-24 18:20:34,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:20:34,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:20:34,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:20:34,659 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:20:34,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:20:34,989 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:20:34,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34 WrapperNode [2020-09-24 18:20:34,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:20:34,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:20:34,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:20:34,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:20:35,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:35,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:35,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:35,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:35,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:35,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:35,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:35,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:20:35,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:20:35,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:20:35,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:20:35,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:20:35,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:20:35,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:20:35,221 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:20:35,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:20:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:20:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:20:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:20:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:20:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:20:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:20:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:20:36,519 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:20:36,520 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:20:36,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:20:36 BoogieIcfgContainer [2020-09-24 18:20:36,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:20:36,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:20:36,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:20:36,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:20:36,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:20:34" (1/3) ... [2020-09-24 18:20:36,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc3148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:20:36, skipping insertion in model container [2020-09-24 18:20:36,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (2/3) ... [2020-09-24 18:20:36,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc3148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:20:36, skipping insertion in model container [2020-09-24 18:20:36,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:20:36" (3/3) ... [2020-09-24 18:20:36,540 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label52.c [2020-09-24 18:20:36,555 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:20:36,568 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:20:36,595 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:20:36,635 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:20:36,635 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:20:36,635 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:20:36,635 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:20:36,636 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:20:36,636 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:20:36,636 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:20:36,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:20:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 18:20:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-24 18:20:36,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:36,700 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, 1, 1] [2020-09-24 18:20:36,701 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1583508727, now seen corresponding path program 1 times [2020-09-24 18:20:36,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:36,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078676588] [2020-09-24 18:20:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:37,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:37,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:38,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:40,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:41,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:41,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:42,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:42,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-24 18:20:42,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:20:42,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-09-24 18:20:42,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:20:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 18:20:42,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-24 18:20:42,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:20:42,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:42,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:42,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:42,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:42,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:42,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 18:20:42,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 18:20:42,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:42,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078676588] [2020-09-24 18:20:42,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:20:42,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:20:42,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258284911] [2020-09-24 18:20:42,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:20:42,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:20:42,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:20:42,484 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-24 18:20:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:44,614 INFO L93 Difference]: Finished difference Result 1212 states and 1611 transitions. [2020-09-24 18:20:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:20:44,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-09-24 18:20:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:44,657 INFO L225 Difference]: With dead ends: 1212 [2020-09-24 18:20:44,657 INFO L226 Difference]: Without dead ends: 638 [2020-09-24 18:20:44,675 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 [2020-09-24 18:20:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-24 18:20:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 603. [2020-09-24 18:20:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-24 18:20:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-24 18:20:44,783 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 154 [2020-09-24 18:20:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:44,785 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-24 18:20:44,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:20:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-24 18:20:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 18:20:44,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:44,793 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, 1, 1] [2020-09-24 18:20:44,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:20:44,794 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1919557112, now seen corresponding path program 1 times [2020-09-24 18:20:44,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:44,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345761577] [2020-09-24 18:20:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:44,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:45,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:46,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:48,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:49,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:49,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-24 18:20:49,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:20:49,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 18:20:49,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:49,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:20:49,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 18:20:49,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 18:20:49,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:49,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:49,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:49,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:49,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:49,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:49,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 18:20:49,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:49,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:49,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:49,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 18:20:49,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:49,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:49,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:50,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:50,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 18:20:50,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:50,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 18:20:50,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:50,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:50,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:20:50,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 18:20:50,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:50,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345761577] [2020-09-24 18:20:50,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:20:50,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:20:50,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424073089] [2020-09-24 18:20:50,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:20:50,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:50,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:20:50,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:20:50,077 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 7 states. [2020-09-24 18:20:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:52,565 INFO L93 Difference]: Finished difference Result 1660 states and 2141 transitions. [2020-09-24 18:20:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:20:52,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2020-09-24 18:20:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:52,580 INFO L225 Difference]: With dead ends: 1660 [2020-09-24 18:20:52,580 INFO L226 Difference]: Without dead ends: 1081 [2020-09-24 18:20:52,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:20:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-09-24 18:20:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 936. [2020-09-24 18:20:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-09-24 18:20:52,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1126 transitions. [2020-09-24 18:20:52,691 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1126 transitions. Word has length 175 [2020-09-24 18:20:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:52,694 INFO L479 AbstractCegarLoop]: Abstraction has 936 states and 1126 transitions. [2020-09-24 18:20:52,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:20:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1126 transitions. [2020-09-24 18:20:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 18:20:52,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:52,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:20:52,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:20:52,704 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:52,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1605021178, now seen corresponding path program 1 times [2020-09-24 18:20:52,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:52,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142737948] [2020-09-24 18:20:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:52,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:52,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:53,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:53,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:54,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:54,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:56,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:57,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:58,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:58,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-24 18:20:58,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 18:20:58,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5238 [2020-09-24 18:20:58,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:58,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:20:58,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-24 18:20:58,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:20:58,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:58,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:58,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:58,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:58,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:20:58,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:20:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:58,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:20:58,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:58,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:58,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:58,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:58,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 18:20:58,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:58,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 18:20:58,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:58,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:58,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:58,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:20:58,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:58,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142737948] [2020-09-24 18:20:58,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:20:58,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:20:58,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363823042] [2020-09-24 18:20:58,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:20:58,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:58,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:20:58,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:20:58,313 INFO L87 Difference]: Start difference. First operand 936 states and 1126 transitions. Second operand 5 states. [2020-09-24 18:20:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:59,800 INFO L93 Difference]: Finished difference Result 2523 states and 3162 transitions. [2020-09-24 18:20:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:20:59,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2020-09-24 18:20:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:59,812 INFO L225 Difference]: With dead ends: 2523 [2020-09-24 18:20:59,812 INFO L226 Difference]: Without dead ends: 1611 [2020-09-24 18:20:59,816 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 [2020-09-24 18:20:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-09-24 18:20:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1514. [2020-09-24 18:20:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-09-24 18:20:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1891 transitions. [2020-09-24 18:20:59,867 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1891 transitions. Word has length 175 [2020-09-24 18:20:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:59,868 INFO L479 AbstractCegarLoop]: Abstraction has 1514 states and 1891 transitions. [2020-09-24 18:20:59,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:20:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1891 transitions. [2020-09-24 18:20:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-24 18:20:59,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:59,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:20:59,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:20:59,877 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -422908273, now seen corresponding path program 1 times [2020-09-24 18:20:59,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:59,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314298648] [2020-09-24 18:20:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:00,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:00,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:00,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:00,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:01,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:01,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:01,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:01,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:02,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:02,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:02,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:02,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:02,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:02,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:04,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:04,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-24 18:21:04,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-24 18:21:04,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-24 18:21:04,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:04,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:21:04,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:21:04,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 18:21:04,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:05,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:21:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:05,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:05,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:05,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:21:05,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:05,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:21:05,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:21:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:21:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:05,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:21:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:05,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:05,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:05,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 18:21:05,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:05,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 18:21:05,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:21:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:21:05,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:05,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 18:21:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:05,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:05,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:05,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 18:21:05,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:05,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-24 18:21:05,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:05,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:21:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:21:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:21:05,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:21:05,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314298648] [2020-09-24 18:21:05,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:21:05,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:21:05,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155275302] [2020-09-24 18:21:05,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:21:05,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:21:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:21:05,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:21:05,403 INFO L87 Difference]: Start difference. First operand 1514 states and 1891 transitions. Second operand 7 states. [2020-09-24 18:21:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:21:09,192 INFO L93 Difference]: Finished difference Result 4407 states and 5936 transitions. [2020-09-24 18:21:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:21:09,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 205 [2020-09-24 18:21:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:21:09,214 INFO L225 Difference]: With dead ends: 4407 [2020-09-24 18:21:09,214 INFO L226 Difference]: Without dead ends: 2917 [2020-09-24 18:21:09,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:21:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2020-09-24 18:21:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2762. [2020-09-24 18:21:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2020-09-24 18:21:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 3459 transitions. [2020-09-24 18:21:09,351 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 3459 transitions. Word has length 205 [2020-09-24 18:21:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:21:09,352 INFO L479 AbstractCegarLoop]: Abstraction has 2762 states and 3459 transitions. [2020-09-24 18:21:09,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:21:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 3459 transitions. [2020-09-24 18:21:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-09-24 18:21:09,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:21:09,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:21:09,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:21:09,366 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:21:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:21:09,367 INFO L82 PathProgramCache]: Analyzing trace with hash -102390325, now seen corresponding path program 1 times [2020-09-24 18:21:09,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:21:09,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331061807] [2020-09-24 18:21:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:21:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:09,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:09,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:09,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:09,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:10,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:10,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:11,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:11,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:11,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:13,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:13,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:14,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:14,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-09-24 18:21:14,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 18:21:14,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 18:21:14,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:14,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:21:14,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-24 18:21:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 18:21:14,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:21:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:14,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:14,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:14,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:21:14,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:21:14,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:21:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:21:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:14,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:21:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:14,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:14,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:21:14,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 18:21:14,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:21:14,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:14,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 18:21:14,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:14,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 18:21:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:14,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:14,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:14,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 18:21:14,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:14,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-24 18:21:14,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:14,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:21:14,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:21:14,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:21:14,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:21:14,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331061807] [2020-09-24 18:21:14,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:21:14,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 18:21:14,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506414222] [2020-09-24 18:21:14,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:21:14,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:21:14,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:21:14,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:21:14,822 INFO L87 Difference]: Start difference. First operand 2762 states and 3459 transitions. Second operand 8 states. [2020-09-24 18:21:15,244 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-09-24 18:21:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:21:19,322 INFO L93 Difference]: Finished difference Result 5899 states and 7594 transitions. [2020-09-24 18:21:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:21:19,326 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 213 [2020-09-24 18:21:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:21:19,350 INFO L225 Difference]: With dead ends: 5899 [2020-09-24 18:21:19,351 INFO L226 Difference]: Without dead ends: 3918 [2020-09-24 18:21:19,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 18:21:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2020-09-24 18:21:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3702. [2020-09-24 18:21:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3702 states. [2020-09-24 18:21:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 4591 transitions. [2020-09-24 18:21:19,478 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 4591 transitions. Word has length 213 [2020-09-24 18:21:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:21:19,478 INFO L479 AbstractCegarLoop]: Abstraction has 3702 states and 4591 transitions. [2020-09-24 18:21:19,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:21:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 4591 transitions. [2020-09-24 18:21:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-24 18:21:19,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:21:19,493 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:21:19,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:21:19,493 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:21:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:21:19,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1011570343, now seen corresponding path program 1 times [2020-09-24 18:21:19,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:21:19,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585347250] [2020-09-24 18:21:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:21:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking...