/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/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:08:48,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:08:48,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:08:48,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:08:48,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:08:48,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:08:48,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:08:48,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:08:48,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:08:48,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:08:48,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:08:48,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:08:48,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:08:48,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:08:48,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:08:48,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:08:48,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:08:48,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:08:48,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:08:48,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:08:48,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:08:48,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:08:48,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:08:48,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:08:48,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:08:48,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:08:48,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:08:48,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:08:48,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:08:48,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:08:48,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:08:48,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:08:48,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:08:48,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:08:48,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:08:48,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:08:48,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:08:48,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:08:48,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:08:48,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:08:48,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:08:48,267 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 11:08:48,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:08:48,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:08:48,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:08:48,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:08:48,300 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:08:48,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:08:48,300 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:08:48,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:08:48,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:08:48,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:08:48,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:08:48,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:08:48,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:08:48,301 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:08:48,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:08:48,302 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:08:48,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:08:48,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:08:48,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:08:48,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:08:48,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:08:48,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:08:48,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:08:48,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:08:48,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:08:48,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:08:48,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:08:48,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:08:48,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:08:48,305 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 11:08:48,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:08:48,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:08:48,798 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:08:48,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:08:48,800 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:08:48,801 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 11:08:48,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc307675d/7f7d94c999444d08a397ca5ca17f6c40/FLAG64542e818 [2020-09-25 11:08:49,440 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:08:49,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 11:08:49,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc307675d/7f7d94c999444d08a397ca5ca17f6c40/FLAG64542e818 [2020-09-25 11:08:49,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc307675d/7f7d94c999444d08a397ca5ca17f6c40 [2020-09-25 11:08:49,783 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:08:49,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:08:49,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:08:49,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:08:49,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:08:49,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:08:49" (1/1) ... [2020-09-25 11:08:49,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6c8a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:49, skipping insertion in model container [2020-09-25 11:08:49,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:08:49" (1/1) ... [2020-09-25 11:08:49,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:08:49,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:08:50,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:08:50,072 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:08:50,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:08:50,111 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:08:50,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50 WrapperNode [2020-09-25 11:08:50,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:08:50,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:08:50,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:08:50,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:08:50,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (1/1) ... [2020-09-25 11:08:50,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (1/1) ... [2020-09-25 11:08:50,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (1/1) ... [2020-09-25 11:08:50,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (1/1) ... [2020-09-25 11:08:50,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (1/1) ... [2020-09-25 11:08:50,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (1/1) ... [2020-09-25 11:08:50,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (1/1) ... [2020-09-25 11:08:50,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:08:50,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:08:50,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:08:50,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:08:50,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:08:50,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:08:50,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:08:50,313 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 11:08:50,313 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-25 11:08:50,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:08:50,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 11:08:50,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:08:50,314 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 11:08:50,315 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-25 11:08:50,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:08:50,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:08:50,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:08:50,545 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:08:50,545 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 11:08:50,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:08:50 BoogieIcfgContainer [2020-09-25 11:08:50,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:08:50,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:08:50,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:08:50,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:08:50,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:08:49" (1/3) ... [2020-09-25 11:08:50,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a11f2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:08:50, skipping insertion in model container [2020-09-25 11:08:50,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:08:50" (2/3) ... [2020-09-25 11:08:50,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a11f2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:08:50, skipping insertion in model container [2020-09-25 11:08:50,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:08:50" (3/3) ... [2020-09-25 11:08:50,585 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-25 11:08:50,610 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:08:50,619 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:08:50,644 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:08:50,675 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:08:50,675 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:08:50,675 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:08:50,675 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:08:50,676 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:08:50,676 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:08:50,676 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:08:50,676 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:08:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-25 11:08:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 11:08:50,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:08:50,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:08:50,707 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:08:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:08:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-25 11:08:50,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:08:50,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829039208] [2020-09-25 11:08:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:08:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:50,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:50,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:50,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:08:50,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:50,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-25 11:08:50,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:50,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:50,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:08:50,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:08:50,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:08:50,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:08:51,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:08:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:51,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:51,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:08:51,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:51,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:08:51,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:51,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:08:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:51,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:08:51,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:51,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 11:08:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:51,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:51,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:51,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:08:51,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:51,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 11:08:51,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:51,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:08:51,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:51,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:08:51,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:51,124 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 11:08:51,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829039208] [2020-09-25 11:08:51,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:08:51,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:08:51,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166101724] [2020-09-25 11:08:51,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:08:51,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:08:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:08:51,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:08:51,152 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-25 11:08:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:08:51,242 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-25 11:08:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:08:51,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 11:08:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:08:51,257 INFO L225 Difference]: With dead ends: 51 [2020-09-25 11:08:51,257 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 11:08:51,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:08:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 11:08:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-25 11:08:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 11:08:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-25 11:08:51,318 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-25 11:08:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:08:51,319 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-25 11:08:51,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:08:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-25 11:08:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 11:08:51,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:08:51,322 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] [2020-09-25 11:08:51,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:08:51,323 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:08:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:08:51,324 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-25 11:08:51,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:08:51,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108397911] [2020-09-25 11:08:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:08:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:51,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:51,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:08:51,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:51,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-09-25 11:08:51,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:51,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:51,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:08:51,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 11:08:51,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 11:08:51,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:51,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:08:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:51,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:51,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:51,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:08:51,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:08:51,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:51,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:51,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:08:51,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:51,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:08:51,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:51,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 11:08:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:51,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:51,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:51,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:08:51,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:51,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-25 11:08:51,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:51,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:51,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:08:51,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:51,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:08:51,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:51,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 11:08:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:51,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:51,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:51,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:08:51,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:51,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 11:08:51,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:51,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:08:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:08:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:52,030 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 11:08:52,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108397911] [2020-09-25 11:08:52,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:08:52,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 11:08:52,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182735855] [2020-09-25 11:08:52,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:08:52,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:08:52,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:08:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:08:52,037 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-25 11:08:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:08:52,166 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-25 11:08:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:08:52,167 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-25 11:08:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:08:52,169 INFO L225 Difference]: With dead ends: 66 [2020-09-25 11:08:52,169 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 11:08:52,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:08:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 11:08:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 11:08:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 11:08:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-25 11:08:52,180 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-25 11:08:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:08:52,180 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-25 11:08:52,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:08:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-25 11:08:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 11:08:52,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:08:52,182 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:08:52,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:08:52,183 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:08:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:08:52,183 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-25 11:08:52,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:08:52,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111811041] [2020-09-25 11:08:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:08:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:52,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:52,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:52,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:52,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 11:08:52,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:08:52,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-09-25 11:08:52,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:52,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:52,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:08:52,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 11:08:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 11:08:52,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:08:52,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:08:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:52,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:52,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:52,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:08:52,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:52,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:08:52,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:52,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:08:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:08:52,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:52,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 11:08:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:52,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:52,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:52,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:53,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:53,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 11:08:53,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:08:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-09-25 11:08:53,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:53,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:08:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 11:08:53,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 11:08:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:53,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:53,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:53,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:08:53,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:08:53,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-25 11:08:53,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:53,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:53,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:08:53,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:08:53,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:53,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 11:08:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:53,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:53,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:08:53,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:53,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:08:53,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:53,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:53,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:08:53,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:08:53,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 11:08:53,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111811041] [2020-09-25 11:08:53,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:08:53,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 11:08:53,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138500906] [2020-09-25 11:08:53,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:08:53,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:08:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:08:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:08:53,824 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2020-09-25 11:08:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:08:53,943 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-09-25 11:08:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:08:53,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-25 11:08:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:08:53,945 INFO L225 Difference]: With dead ends: 69 [2020-09-25 11:08:53,945 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 11:08:53,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:08:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 11:08:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-25 11:08:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 11:08:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-25 11:08:53,955 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-25 11:08:53,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:08:53,956 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-25 11:08:53,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:08:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-25 11:08:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 11:08:53,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:08:53,958 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:08:53,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:08:53,958 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:08:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:08:53,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-09-25 11:08:53,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:08:53,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356252601] [2020-09-25 11:08:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:08:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:53,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:54,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:54,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 11:08:54,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:08:54,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-09-25 11:08:54,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:54,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:08:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 11:08:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:08:54,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:54,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:08:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:54,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:54,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:08:54,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:54,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:08:54,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:54,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:54,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:08:54,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:54,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:08:54,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:54,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 11:08:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:54,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:54,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:54,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:54,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 11:08:54,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:08:54,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-09-25 11:08:54,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:54,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:54,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:08:54,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:54,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 11:08:54,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:54,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 11:08:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:54,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:54,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:08:54,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:08:54,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-25 11:08:54,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:54,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:08:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 11:08:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:08:54,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:54,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 11:08:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:08:54,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:08:54,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:08:54,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:08:54,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:08:54,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 11:08:54,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:08:54,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:08:54,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:08:54,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:08:54,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:08:54,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:08:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 11:08:54,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356252601] [2020-09-25 11:08:54,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:08:54,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 11:08:54,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351381224] [2020-09-25 11:08:54,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:08:54,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:08:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:08:54,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:08:54,667 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 8 states. [2020-09-25 11:08:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:08:54,766 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-09-25 11:08:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:08:54,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-25 11:08:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:08:54,771 INFO L225 Difference]: With dead ends: 84 [2020-09-25 11:08:54,771 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 11:08:54,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:08:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 11:08:54,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-09-25 11:08:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 11:08:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-09-25 11:08:54,787 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2020-09-25 11:08:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:08:54,790 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-09-25 11:08:54,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:08:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-09-25 11:08:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 11:08:54,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:08:54,793 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:08:54,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:08:54,794 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:08:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:08:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-25 11:08:54,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:08:54,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222911457] [2020-09-25 11:08:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:08:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 11:08:54,811 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 11:08:54,811 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 11:08:54,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:08:54,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:08:54 BoogieIcfgContainer [2020-09-25 11:08:54,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:08:54,852 INFO L168 Benchmark]: Toolchain (without parser) took 5065.34 ms. Allocated memory was 146.8 MB in the beginning and 245.9 MB in the end (delta: 99.1 MB). Free memory was 102.0 MB in the beginning and 188.2 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 11:08:54,854 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.8 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 11:08:54,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.72 ms. Allocated memory is still 146.8 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 11:08:54,859 INFO L168 Benchmark]: Boogie Preprocessor took 122.29 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 91.8 MB in the beginning and 182.0 MB in the end (delta: -90.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 11:08:54,865 INFO L168 Benchmark]: RCFGBuilder took 317.50 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-09-25 11:08:54,866 INFO L168 Benchmark]: TraceAbstraction took 4281.48 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 168.2 MB in the beginning and 188.2 MB in the end (delta: -20.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-09-25 11:08:54,877 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 146.8 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 321.72 ms. Allocated memory is still 146.8 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.29 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 91.8 MB in the beginning and 182.0 MB in the end (delta: -90.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.50 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4281.48 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 168.2 MB in the beginning and 188.2 MB in the end (delta: -20.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 159 SDtfs, 16 SDslu, 780 SDs, 0 SdLazy, 113 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 8295 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...