/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=0.2 --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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:13:42,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:13:42,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:13:42,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:13:42,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:13:42,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:13:42,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:13:42,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:13:42,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:13:42,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:13:42,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:13:42,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:13:42,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:13:42,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:13:42,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:13:42,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:13:42,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:13:42,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:13:42,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:13:42,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:13:42,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:13:42,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:13:42,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:13:42,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:13:42,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:13:42,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:13:42,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:13:42,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:13:42,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:13:42,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:13:42,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:13:42,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:13:42,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:13:42,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:13:42,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:13:42,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:13:42,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:13:42,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:13:42,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:13:42,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:13:42,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:13:42,185 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 11:13:42,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:13:42,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:13:42,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:13:42,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:13:42,235 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:13:42,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:13:42,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:13:42,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:13:42,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:13:42,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:13:42,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:13:42,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:13:42,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:13:42,238 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:13:42,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:13:42,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:13:42,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:13:42,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:13:42,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:13:42,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:13:42,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:13:42,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:13:42,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:13:42,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:13:42,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:13:42,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:13:42,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:13:42,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:13:42,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:13:42,243 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:13:42,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:13:42,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:13:42,769 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:13:42,772 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:13:42,772 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:13:42,773 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label22.c [2020-09-25 11:13:42,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f9b4edd0/90927bf572fe41e5826baad0427ed27f/FLAG9d5768776 [2020-09-25 11:13:43,508 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:13:43,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label22.c [2020-09-25 11:13:43,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f9b4edd0/90927bf572fe41e5826baad0427ed27f/FLAG9d5768776 [2020-09-25 11:13:43,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f9b4edd0/90927bf572fe41e5826baad0427ed27f [2020-09-25 11:13:43,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:13:43,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:13:43,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:13:43,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:13:43,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:13:43,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:13:43" (1/1) ... [2020-09-25 11:13:43,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88af870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:43, skipping insertion in model container [2020-09-25 11:13:43,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:13:43" (1/1) ... [2020-09-25 11:13:43,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:13:43,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:13:44,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:13:44,263 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:13:44,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:13:44,526 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:13:44,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44 WrapperNode [2020-09-25 11:13:44,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:13:44,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:13:44,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:13:44,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:13:44,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (1/1) ... [2020-09-25 11:13:44,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (1/1) ... [2020-09-25 11:13:44,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (1/1) ... [2020-09-25 11:13:44,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (1/1) ... [2020-09-25 11:13:44,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (1/1) ... [2020-09-25 11:13:44,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (1/1) ... [2020-09-25 11:13:44,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (1/1) ... [2020-09-25 11:13:44,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:13:44,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:13:44,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:13:44,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:13:44,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (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 11:13:44,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:13:44,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:13:44,723 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:13:44,723 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:13:44,723 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:13:44,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:13:44,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:13:44,723 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:13:44,724 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:13:44,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:13:44,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:13:45,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:13:45,987 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:13:45,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:13:45 BoogieIcfgContainer [2020-09-25 11:13:45,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:13:45,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:13:45,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:13:46,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:13:46,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:13:43" (1/3) ... [2020-09-25 11:13:46,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ece744c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:13:46, skipping insertion in model container [2020-09-25 11:13:46,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:44" (2/3) ... [2020-09-25 11:13:46,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ece744c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:13:46, skipping insertion in model container [2020-09-25 11:13:46,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:13:45" (3/3) ... [2020-09-25 11:13:46,008 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label22.c [2020-09-25 11:13:46,019 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:13:46,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:13:46,052 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:13:46,087 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:13:46,087 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:13:46,087 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:13:46,088 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:13:46,088 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:13:46,088 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:13:46,088 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:13:46,088 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:13:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 11:13:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-25 11:13:46,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:46,146 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, 1] [2020-09-25 11:13:46,147 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:46,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1844135333, now seen corresponding path program 1 times [2020-09-25 11:13:46,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:46,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316023275] [2020-09-25 11:13:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:46,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:47,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:48,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:49,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:49,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:50,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:51,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:51,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-25 11:13:51,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 11:13:51,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 11:13:51,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:51,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:13:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:13:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-09-25 11:13:51,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 11:13:51,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:51,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:51,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:51,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:13:51,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:51,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 11:13:51,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:51,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:51,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:13:51,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:51,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:13:51,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:51,809 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 11:13:51,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316023275] [2020-09-25 11:13:51,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:13:51,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:13:51,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344697071] [2020-09-25 11:13:51,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:13:51,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:13:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:13:51,841 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 11:13:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:53,868 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 11:13:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:13:53,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-09-25 11:13:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:53,912 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 11:13:53,912 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 11:13:53,926 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 11:13:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 11:13:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 11:13:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 11:13:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 11:13:54,072 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 155 [2020-09-25 11:13:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:54,073 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 11:13:54,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:13:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 11:13:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 11:13:54,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:54,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:54,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:13:54,087 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:54,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1778459773, now seen corresponding path program 1 times [2020-09-25 11:13:54,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:54,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506847112] [2020-09-25 11:13:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:54,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:54,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:56,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:58,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:58,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:59,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:59,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-09-25 11:13:59,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:13:59,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 11:13:59,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:59,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-25 11:13:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:13:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-09-25 11:13:59,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:59,833 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-09-25 11:14:00,092 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2020-09-25 11:14:00,371 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 48 [2020-09-25 11:14:00,635 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 46 [2020-09-25 11:14:00,937 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 50 [2020-09-25 11:14:01,239 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2020-09-25 11:14:01,520 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2020-09-25 11:14:01,845 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2020-09-25 11:14:02,143 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 43 [2020-09-25 11:14:02,368 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2020-09-25 11:14:02,594 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-09-25 11:14:02,814 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2020-09-25 11:14:02,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:02,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:02,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:02,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:02,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:02,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 11:14:02,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:02,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:14:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:14:02,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:03,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:03,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:03,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:03,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:03,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:14:03,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:14:03,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-09-25 11:14:03,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:03,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:14:03,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:03,529 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 11:14:03,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506847112] [2020-09-25 11:14:03,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:03,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 11:14:03,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431081409] [2020-09-25 11:14:03,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 11:14:03,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:03,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 11:14:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-25 11:14:03,534 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 26 states. [2020-09-25 11:14:04,383 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-09-25 11:14:05,044 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-09-25 11:14:05,524 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-09-25 11:14:05,726 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-09-25 11:14:06,133 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-09-25 11:14:06,413 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-09-25 11:14:07,774 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-09-25 11:14:08,124 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2020-09-25 11:14:08,554 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-25 11:14:08,827 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-09-25 11:14:09,127 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-09-25 11:14:09,816 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 95 [2020-09-25 11:14:10,341 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-25 11:14:10,831 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2020-09-25 11:14:11,151 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-09-25 11:14:11,475 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-25 11:14:12,261 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2020-09-25 11:14:12,917 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 11:14:13,328 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2020-09-25 11:14:13,796 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 95 [2020-09-25 11:14:14,231 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2020-09-25 11:14:14,687 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2020-09-25 11:14:15,050 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-09-25 11:14:15,409 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2020-09-25 11:14:15,629 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-09-25 11:14:15,914 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-09-25 11:14:16,781 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-09-25 11:14:17,458 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-09-25 11:14:17,829 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-09-25 11:14:18,256 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 88 [2020-09-25 11:14:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:21,427 INFO L93 Difference]: Finished difference Result 2908 states and 4147 transitions. [2020-09-25 11:14:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-25 11:14:21,428 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 176 [2020-09-25 11:14:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:21,449 INFO L225 Difference]: With dead ends: 2908 [2020-09-25 11:14:21,449 INFO L226 Difference]: Without dead ends: 2329 [2020-09-25 11:14:21,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1430, Invalid=4890, Unknown=0, NotChecked=0, Total=6320 [2020-09-25 11:14:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2020-09-25 11:14:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 1558. [2020-09-25 11:14:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1558 states. [2020-09-25 11:14:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 1878 transitions. [2020-09-25 11:14:21,582 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 1878 transitions. Word has length 176 [2020-09-25 11:14:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:21,582 INFO L479 AbstractCegarLoop]: Abstraction has 1558 states and 1878 transitions. [2020-09-25 11:14:21,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 11:14:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 1878 transitions. [2020-09-25 11:14:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-25 11:14:21,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:21,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:21,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:14:21,593 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2123217844, now seen corresponding path program 1 times [2020-09-25 11:14:21,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:21,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786451470] [2020-09-25 11:14:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:21,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:22,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:26,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:26,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:26,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:26,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-25 11:14:26,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:14:26,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 11:14:26,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:26,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:14:26,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 11:14:26,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-25 11:14:26,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 11:14:27,186 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 31 [2020-09-25 11:14:27,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:27,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:27,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:27,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:27,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:27,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 11:14:27,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:27,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:27,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:27,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:27,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:27,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 11:14:27,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:27,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:27,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:27,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:14:27,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:27,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 11:14:27,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:27,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:14:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:27,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 11:14:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:27,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:27,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:27,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:27,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:14:27,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:14:27,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-09-25 11:14:27,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:27,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:27,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:14:27,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:14:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:14:27,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786451470] [2020-09-25 11:14:27,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:27,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:14:27,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044010687] [2020-09-25 11:14:27,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:14:27,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:27,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:14:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:14:27,980 INFO L87 Difference]: Start difference. First operand 1558 states and 1878 transitions. Second operand 11 states. [2020-09-25 11:14:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:33,610 INFO L93 Difference]: Finished difference Result 4243 states and 5485 transitions. [2020-09-25 11:14:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 11:14:33,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 197 [2020-09-25 11:14:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:33,625 INFO L225 Difference]: With dead ends: 4243 [2020-09-25 11:14:33,626 INFO L226 Difference]: Without dead ends: 2332 [2020-09-25 11:14:33,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-09-25 11:14:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-09-25 11:14:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2183. [2020-09-25 11:14:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2183 states. [2020-09-25 11:14:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 2557 transitions. [2020-09-25 11:14:33,702 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 2557 transitions. Word has length 197 [2020-09-25 11:14:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:33,702 INFO L479 AbstractCegarLoop]: Abstraction has 2183 states and 2557 transitions. [2020-09-25 11:14:33,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:14:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 2557 transitions. [2020-09-25 11:14:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-09-25 11:14:33,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:33,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:33,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:14:33,712 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash -289380074, now seen corresponding path program 1 times [2020-09-25 11:14:33,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:33,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214913372] [2020-09-25 11:14:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:33,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking...