/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:06:54,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:06:54,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:06:54,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:06:54,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:06:54,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:06:54,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:06:54,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:06:54,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:06:54,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:06:54,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:06:54,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:06:54,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:06:54,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:06:54,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:06:54,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:06:54,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:06:54,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:06:54,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:06:54,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:06:54,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:06:54,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:06:54,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:06:54,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:06:54,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:06:54,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:06:54,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:06:54,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:06:54,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:06:54,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:06:54,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:06:54,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:06:54,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:06:54,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:06:54,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:06:54,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:06:54,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:06:54,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:06:54,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:06:54,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:06:54,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:06:54,393 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 10:06:54,421 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:06:54,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:06:54,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:06:54,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:06:54,423 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:06:54,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:06:54,424 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:06:54,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:06:54,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:06:54,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:06:54,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:06:54,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:06:54,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:06:54,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:06:54,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:06:54,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:06:54,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:06:54,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:06:54,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:06:54,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:06:54,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:06:54,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:06:54,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:06:54,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:06:54,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:06:54,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:06:54,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:06:54,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:06:54,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:06:54,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:06:54,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:06:54,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:06:54,951 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:06:54,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:06:54,954 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:06:54,955 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-25 10:06:55,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4496b1d7c/1be96d63403a470da992928eba72c6a6/FLAGe9592d43e [2020-09-25 10:06:55,673 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:06:55,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-25 10:06:55,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4496b1d7c/1be96d63403a470da992928eba72c6a6/FLAGe9592d43e [2020-09-25 10:06:55,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4496b1d7c/1be96d63403a470da992928eba72c6a6 [2020-09-25 10:06:55,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:06:55,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:06:55,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:06:55,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:06:55,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:06:55,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:06:55" (1/1) ... [2020-09-25 10:06:55,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47591dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:55, skipping insertion in model container [2020-09-25 10:06:55,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:06:55" (1/1) ... [2020-09-25 10:06:55,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:06:56,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:06:56,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:06:56,640 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:06:56,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:06:56,852 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:06:56,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56 WrapperNode [2020-09-25 10:06:56,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:06:56,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:06:56,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:06:56,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:06:56,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (1/1) ... [2020-09-25 10:06:56,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (1/1) ... [2020-09-25 10:06:56,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (1/1) ... [2020-09-25 10:06:56,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (1/1) ... [2020-09-25 10:06:56,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (1/1) ... [2020-09-25 10:06:56,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (1/1) ... [2020-09-25 10:06:56,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (1/1) ... [2020-09-25 10:06:56,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:06:56,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:06:56,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:06:56,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:06:56,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (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 10:06:57,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:06:57,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:06:57,056 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 10:06:57,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:06:57,056 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 10:06:57,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:06:57,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:06:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:06:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:06:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:06:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:06:58,442 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:06:58,442 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:06:58,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:06:58 BoogieIcfgContainer [2020-09-25 10:06:58,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:06:58,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:06:58,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:06:58,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:06:58,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:06:55" (1/3) ... [2020-09-25 10:06:58,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e785604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:06:58, skipping insertion in model container [2020-09-25 10:06:58,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:56" (2/3) ... [2020-09-25 10:06:58,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e785604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:06:58, skipping insertion in model container [2020-09-25 10:06:58,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:06:58" (3/3) ... [2020-09-25 10:06:58,461 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label38.c [2020-09-25 10:06:58,473 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:06:58,484 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:06:58,508 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:06:58,544 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:06:58,545 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:06:58,545 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:06:58,545 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:06:58,545 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:06:58,546 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:06:58,546 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:06:58,546 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:06:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 10:06:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 10:06:58,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:58,600 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] [2020-09-25 10:06:58,600 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash -857113145, now seen corresponding path program 1 times [2020-09-25 10:06:58,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:58,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382521395] [2020-09-25 10:06:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:58,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:59,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:00,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:01,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:01,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:01,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:02,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:03,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:03,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 10:07:03,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:07:03,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 10:07:03,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:03,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:07:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 10:07:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 10:07:03,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 10:07:04,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:04,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:04,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:04,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:04,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:04,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 10:07:04,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:04,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:04,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:07:04,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:04,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 10:07:04,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:07:04,216 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 10:07:04,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382521395] [2020-09-25 10:07:04,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:07:04,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:07:04,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107163044] [2020-09-25 10:07:04,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:07:04,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:04,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:07:04,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:07:04,260 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 10:07:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:06,468 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 10:07:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:07:06,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-09-25 10:07:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:06,496 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 10:07:06,496 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 10:07:06,506 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 10:07:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 10:07:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 10:07:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 10:07:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 10:07:06,615 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 110 [2020-09-25 10:07:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:06,616 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 10:07:06,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:07:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 10:07:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 10:07:06,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:06,625 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 10:07:06,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:07:06,625 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:06,626 INFO L82 PathProgramCache]: Analyzing trace with hash -431161361, now seen corresponding path program 1 times [2020-09-25 10:07:06,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:06,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632615460] [2020-09-25 10:07:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:06,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:07,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:08,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:09,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:09,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:10,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:11,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:11,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:11,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-25 10:07:11,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 10:07:11,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 10:07:11,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:11,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:11,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-25 10:07:11,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:07:11,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-09-25 10:07:11,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:12,164 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-09-25 10:07:12,314 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2020-09-25 10:07:12,447 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2020-09-25 10:07:12,611 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-09-25 10:07:13,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:13,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:13,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:13,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:13,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:13,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-25 10:07:13,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:13,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:13,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:07:13,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:13,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 10:07:13,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:07:13,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:07:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:13,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:13,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:13,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 10:07:13,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:07:13,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-25 10:07:13,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:13,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:13,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:07:13,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:07:13,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 10:07:13,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:07:13,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632615460] [2020-09-25 10:07:13,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:07:13,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 10:07:13,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393439372] [2020-09-25 10:07:13,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 10:07:13,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 10:07:13,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2020-09-25 10:07:13,899 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 26 states. [2020-09-25 10:07:14,644 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-25 10:07:15,199 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-09-25 10:07:15,649 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-25 10:07:15,835 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-09-25 10:07:16,163 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-09-25 10:07:16,406 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-09-25 10:07:17,666 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-09-25 10:07:17,852 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-25 10:07:18,262 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-09-25 10:07:18,510 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-25 10:07:18,797 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-25 10:07:19,436 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-09-25 10:07:19,915 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-09-25 10:07:20,405 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-09-25 10:07:20,708 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-09-25 10:07:21,013 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-25 10:07:21,732 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-09-25 10:07:22,094 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-25 10:07:22,342 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-25 10:07:22,707 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-09-25 10:07:23,136 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-09-25 10:07:23,520 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-09-25 10:07:23,899 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-09-25 10:07:24,214 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-09-25 10:07:24,550 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-09-25 10:07:24,886 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-25 10:07:25,712 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-25 10:07:26,318 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-09-25 10:07:26,680 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2020-09-25 10:07:27,062 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-09-25 10:07:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:28,670 INFO L93 Difference]: Finished difference Result 2655 states and 3541 transitions. [2020-09-25 10:07:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-25 10:07:28,671 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-09-25 10:07:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:28,688 INFO L225 Difference]: With dead ends: 2655 [2020-09-25 10:07:28,688 INFO L226 Difference]: Without dead ends: 2076 [2020-09-25 10:07:28,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1380, Invalid=4626, Unknown=0, NotChecked=0, Total=6006 [2020-09-25 10:07:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2020-09-25 10:07:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1672. [2020-09-25 10:07:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-25 10:07:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2050 transitions. [2020-09-25 10:07:28,844 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2050 transitions. Word has length 131 [2020-09-25 10:07:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:28,848 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2050 transitions. [2020-09-25 10:07:28,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 10:07:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2050 transitions. [2020-09-25 10:07:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 10:07:28,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:28,867 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 10:07:28,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:07:28,867 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1765072832, now seen corresponding path program 1 times [2020-09-25 10:07:28,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:28,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630297133] [2020-09-25 10:07:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:28,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:29,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:29,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:29,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:29,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:29,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:31,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:33,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:33,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-25 10:07:33,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:07:33,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 10:07:33,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:33,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:07:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-09-25 10:07:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-25 10:07:33,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:34,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:34,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:34,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:34,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:34,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:34,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 10:07:34,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:34,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:07:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:07:34,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:34,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:07:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:34,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:34,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:34,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 10:07:34,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:34,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 10:07:34,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:34,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:34,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:07:34,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:34,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:07:34,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:34,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 10:07:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:34,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:34,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:34,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 10:07:34,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:34,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 10:07:34,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:34,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:07:34,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:34,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 10:07:34,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 10:07:34,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630297133] [2020-09-25 10:07:34,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:07:34,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 10:07:34,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680553759] [2020-09-25 10:07:34,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:07:34,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:34,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:07:34,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:07:34,198 INFO L87 Difference]: Start difference. First operand 1672 states and 2050 transitions. Second operand 5 states. [2020-09-25 10:07:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:36,170 INFO L93 Difference]: Finished difference Result 3952 states and 4970 transitions. [2020-09-25 10:07:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:07:36,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-09-25 10:07:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:36,185 INFO L225 Difference]: With dead ends: 3952 [2020-09-25 10:07:36,185 INFO L226 Difference]: Without dead ends: 2304 [2020-09-25 10:07:36,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:07:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2020-09-25 10:07:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1962. [2020-09-25 10:07:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1962 states. [2020-09-25 10:07:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2438 transitions. [2020-09-25 10:07:36,263 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2438 transitions. Word has length 152 [2020-09-25 10:07:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:36,263 INFO L479 AbstractCegarLoop]: Abstraction has 1962 states and 2438 transitions. [2020-09-25 10:07:36,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:07:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2438 transitions. [2020-09-25 10:07:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-25 10:07:36,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:36,272 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] [2020-09-25 10:07:36,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:07:36,272 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1020396383, now seen corresponding path program 1 times [2020-09-25 10:07:36,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:36,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68633939] [2020-09-25 10:07:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:36,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:36,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:36,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:36,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:39,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:41,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:41,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-25 10:07:41,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:07:41,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 10:07:41,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:41,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:07:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-09-25 10:07:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-25 10:07:41,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:07:41,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:41,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:41,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:41,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:41,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 10:07:41,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:41,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:41,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:07:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:07:41,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:41,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:07:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:41,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:41,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:41,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 10:07:41,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:41,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 10:07:41,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:41,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:07:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:41,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:07:41,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:41,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 10:07:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:41,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:41,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:41,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 10:07:41,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:41,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 10:07:41,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:41,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:07:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 10:07:41,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 10:07:41,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68633939] [2020-09-25 10:07:41,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:07:41,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 10:07:41,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153064825] [2020-09-25 10:07:41,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:07:41,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:07:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:07:41,642 INFO L87 Difference]: Start difference. First operand 1962 states and 2438 transitions. Second operand 5 states. [2020-09-25 10:07:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:43,298 INFO L93 Difference]: Finished difference Result 4391 states and 5558 transitions. [2020-09-25 10:07:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:07:43,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-09-25 10:07:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:43,316 INFO L225 Difference]: With dead ends: 4391 [2020-09-25 10:07:43,317 INFO L226 Difference]: Without dead ends: 2453 [2020-09-25 10:07:43,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:07:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2020-09-25 10:07:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2105. [2020-09-25 10:07:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2105 states. [2020-09-25 10:07:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 2645 transitions. [2020-09-25 10:07:43,403 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 2645 transitions. Word has length 161 [2020-09-25 10:07:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:43,404 INFO L479 AbstractCegarLoop]: Abstraction has 2105 states and 2645 transitions. [2020-09-25 10:07:43,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:07:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 2645 transitions. [2020-09-25 10:07:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-25 10:07:43,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:43,413 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, 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] [2020-09-25 10:07:43,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:07:43,413 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash 192030802, now seen corresponding path program 1 times [2020-09-25 10:07:43,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:43,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689147317] [2020-09-25 10:07:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:43,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:44,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking...