/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:11:27,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:11:27,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:11:27,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:11:27,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:11:27,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:11:27,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:11:27,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:11:27,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:11:27,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:11:27,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:11:27,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:11:27,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:11:27,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:11:27,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:11:27,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:11:27,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:11:27,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:11:27,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:11:27,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:11:27,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:11:27,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:11:27,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:11:27,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:11:27,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:11:27,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:11:27,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:11:27,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:11:27,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:11:27,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:11:27,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:11:27,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:11:27,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:11:27,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:11:27,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:11:27,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:11:27,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:11:27,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:11:27,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:11:27,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:11:27,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:11:27,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:11:27,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:11:27,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:11:27,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:11:27,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:11:27,319 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:11:27,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:11:27,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:11:27,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:11:27,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:11:27,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:11:27,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:11:27,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:11:27,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:11:27,321 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:11:27,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:11:27,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:11:27,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:11:27,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:11:27,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:11:27,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:11:27,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:11:27,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:11:27,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:11:27,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:11:27,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:11:27,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:11:27,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:11:27,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:11:27,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:11:27,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:11:27,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:11:27,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:11:27,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:11:27,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:11:27,813 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:11:27,814 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-09-24 18:11:27,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0a6a39e/50a0e20a9b0b417c8ed5e49ffffaaa4c/FLAG6733bd654 [2020-09-24 18:11:28,508 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:11:28,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-09-24 18:11:28,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0a6a39e/50a0e20a9b0b417c8ed5e49ffffaaa4c/FLAG6733bd654 [2020-09-24 18:11:28,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0a6a39e/50a0e20a9b0b417c8ed5e49ffffaaa4c [2020-09-24 18:11:28,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:11:28,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:11:28,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:11:28,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:11:28,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:11:28,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:11:28" (1/1) ... [2020-09-24 18:11:28,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43965ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:28, skipping insertion in model container [2020-09-24 18:11:28,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:11:28" (1/1) ... [2020-09-24 18:11:28,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:11:28,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:11:29,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:11:29,153 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:11:29,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:11:29,305 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:11:29,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29 WrapperNode [2020-09-24 18:11:29,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:11:29,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:11:29,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:11:29,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:11:29,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:11:29,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:11:29,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:11:29,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:11:29,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:11:29,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:11:29,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:11:29,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:11:29,445 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 18:11:29,445 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 18:11:29,445 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 18:11:29,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:11:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:11:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 18:11:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 18:11:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:11:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 18:11:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 18:11:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 18:11:29,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:11:29,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:11:29,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:11:29,995 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:11:29,996 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 18:11:30,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:11:30 BoogieIcfgContainer [2020-09-24 18:11:30,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:11:30,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:11:30,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:11:30,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:11:30,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:11:28" (1/3) ... [2020-09-24 18:11:30,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3334385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:11:30, skipping insertion in model container [2020-09-24 18:11:30,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (2/3) ... [2020-09-24 18:11:30,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3334385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:11:30, skipping insertion in model container [2020-09-24 18:11:30,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:11:30" (3/3) ... [2020-09-24 18:11:30,013 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-09-24 18:11:30,024 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:11:30,035 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:11:30,058 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:11:30,089 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:11:30,090 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:11:30,090 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:11:30,090 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:11:30,090 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:11:30,090 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:11:30,091 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:11:30,091 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:11:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-09-24 18:11:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 18:11:30,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:30,129 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:30,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1377121462, now seen corresponding path program 1 times [2020-09-24 18:11:30,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:30,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979935686] [2020-09-24 18:11:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:30,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:33,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 18:11:33,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:11:33,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2773 [2020-09-24 18:11:33,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:33,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:11:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-09-24 18:11:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 18:11:33,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:11:33,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:33,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:33,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:33,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:33,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:33,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:33,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 18:11:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:33,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:33,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:33,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:33,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:33,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:33,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:33,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 18:11:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:33,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:33,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:33,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:33,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:33,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:33,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:33,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 18:11:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:33,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:33,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:33,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:11:33,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:11:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 18:11:33,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-24 18:11:33,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979935686] [2020-09-24 18:11:33,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:11:33,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 18:11:33,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325742735] [2020-09-24 18:11:33,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:11:33,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:33,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:11:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:11:33,344 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 8 states. [2020-09-24 18:11:33,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:33,521 INFO L93 Difference]: Finished difference Result 259 states and 324 transitions. [2020-09-24 18:11:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:11:33,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-09-24 18:11:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:33,543 INFO L225 Difference]: With dead ends: 259 [2020-09-24 18:11:33,543 INFO L226 Difference]: Without dead ends: 150 [2020-09-24 18:11:33,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:11:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-24 18:11:33,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2020-09-24 18:11:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-24 18:11:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2020-09-24 18:11:33,627 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 81 [2020-09-24 18:11:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:33,628 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2020-09-24 18:11:33,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:11:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2020-09-24 18:11:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 18:11:33,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:33,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:11:33,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:11:33,635 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1823732666, now seen corresponding path program 1 times [2020-09-24 18:11:33,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:33,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867761752] [2020-09-24 18:11:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:33,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:34,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:34,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 18:11:34,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:11:34,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-09-24 18:11:34,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:34,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:11:34,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 18:11:34,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 18:11:34,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:34,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:34,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:34,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:34,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:34,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:34,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:34,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:34,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:34,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 18:11:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:34,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:34,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:34,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:34,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:34,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:34,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:34,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:34,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:34,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:34,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:34,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 18:11:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:34,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:34,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:34,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:34,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:34,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:11:34,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:34,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:11:34,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:34,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 18:11:34,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:34,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 18:11:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:34,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:34,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:34,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 18:11:34,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:34,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 18:11:34,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:34,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:11:34,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:34,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:11:34,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 18:11:34,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867761752] [2020-09-24 18:11:34,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:11:34,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:11:34,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85002558] [2020-09-24 18:11:34,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:11:34,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:34,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:11:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:11:34,777 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand 9 states. [2020-09-24 18:11:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:35,036 INFO L93 Difference]: Finished difference Result 286 states and 332 transitions. [2020-09-24 18:11:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:11:35,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-09-24 18:11:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:35,041 INFO L225 Difference]: With dead ends: 286 [2020-09-24 18:11:35,041 INFO L226 Difference]: Without dead ends: 227 [2020-09-24 18:11:35,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-24 18:11:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-24 18:11:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 186. [2020-09-24 18:11:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-24 18:11:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 216 transitions. [2020-09-24 18:11:35,066 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 216 transitions. Word has length 85 [2020-09-24 18:11:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:35,066 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 216 transitions. [2020-09-24 18:11:35,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:11:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 216 transitions. [2020-09-24 18:11:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 18:11:35,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:35,070 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:11:35,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:11:35,070 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:35,071 INFO L82 PathProgramCache]: Analyzing trace with hash 808883757, now seen corresponding path program 1 times [2020-09-24 18:11:35,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:35,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750797025] [2020-09-24 18:11:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:35,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:35,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:36,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:36,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 18:11:36,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:11:36,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1393 [2020-09-24 18:11:36,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:36,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 18:11:36,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 18:11:36,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 18:11:36,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:36,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:36,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:36,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:36,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:36,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:36,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:11:36,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:36,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:36,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:36,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:36,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:36,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 18:11:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:36,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:36,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:36,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:36,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:36,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:36,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:36,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:36,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:36,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:36,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:36,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 18:11:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:36,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:36,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:36,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:36,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:36,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:11:36,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:11:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 18:11:36,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:36,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 18:11:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:36,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:36,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:36,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 18:11:36,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:36,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 18:11:36,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:11:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:11:36,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 18:11:36,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750797025] [2020-09-24 18:11:36,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:11:36,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 18:11:36,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336168451] [2020-09-24 18:11:36,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 18:11:36,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:36,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 18:11:36,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 18:11:36,653 INFO L87 Difference]: Start difference. First operand 186 states and 216 transitions. Second operand 10 states. [2020-09-24 18:11:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:36,866 INFO L93 Difference]: Finished difference Result 283 states and 325 transitions. [2020-09-24 18:11:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:11:36,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-09-24 18:11:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:36,870 INFO L225 Difference]: With dead ends: 283 [2020-09-24 18:11:36,870 INFO L226 Difference]: Without dead ends: 199 [2020-09-24 18:11:36,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:11:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-24 18:11:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 163. [2020-09-24 18:11:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-24 18:11:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 186 transitions. [2020-09-24 18:11:36,887 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 186 transitions. Word has length 88 [2020-09-24 18:11:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:36,888 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 186 transitions. [2020-09-24 18:11:36,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 18:11:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 186 transitions. [2020-09-24 18:11:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 18:11:36,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:36,891 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:11:36,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:11:36,891 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1795206334, now seen corresponding path program 2 times [2020-09-24 18:11:36,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:36,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513673993] [2020-09-24 18:11:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:37,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:37,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 18:11:37,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:37,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-09-24 18:11:37,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:37,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 18:11:37,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-09-24 18:11:37,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 18:11:37,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:38,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:38,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:38,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:38,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:38,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 18:11:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:38,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:38,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:38,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 18:11:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 18:11:38,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 18:11:38,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:11:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:11:38,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:38,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 18:11:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 18:11:38,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 18:11:38,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:11:38,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:11:38,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:11:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-24 18:11:38,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513673993] [2020-09-24 18:11:38,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:11:38,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-24 18:11:38,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171078018] [2020-09-24 18:11:38,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 18:11:38,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 18:11:38,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:11:38,265 INFO L87 Difference]: Start difference. First operand 163 states and 186 transitions. Second operand 15 states. [2020-09-24 18:11:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:38,826 INFO L93 Difference]: Finished difference Result 302 states and 358 transitions. [2020-09-24 18:11:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:11:38,827 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-09-24 18:11:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:38,830 INFO L225 Difference]: With dead ends: 302 [2020-09-24 18:11:38,830 INFO L226 Difference]: Without dead ends: 243 [2020-09-24 18:11:38,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-09-24 18:11:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-24 18:11:38,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 216. [2020-09-24 18:11:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-24 18:11:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 251 transitions. [2020-09-24 18:11:38,850 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 251 transitions. Word has length 89 [2020-09-24 18:11:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:38,851 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 251 transitions. [2020-09-24 18:11:38,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 18:11:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 251 transitions. [2020-09-24 18:11:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 18:11:38,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:38,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:38,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:11:38,854 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:38,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1839352304, now seen corresponding path program 1 times [2020-09-24 18:11:38,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:38,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496677124] [2020-09-24 18:11:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:11:38,879 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:11:38,879 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:11:38,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:11:38,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:11:38 BoogieIcfgContainer [2020-09-24 18:11:38,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:11:38,914 INFO L168 Benchmark]: Toolchain (without parser) took 10077.65 ms. Allocated memory was 139.5 MB in the beginning and 312.5 MB in the end (delta: 173.0 MB). Free memory was 102.1 MB in the beginning and 122.3 MB in the end (delta: -20.1 MB). Peak memory consumption was 152.9 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:38,915 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 18:11:38,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 465.72 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.5 MB in the beginning and 181.6 MB in the end (delta: -80.1 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:38,917 INFO L168 Benchmark]: Boogie Preprocessor took 56.61 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 179.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:38,918 INFO L168 Benchmark]: RCFGBuilder took 640.45 ms. Allocated memory is still 202.9 MB. Free memory was 179.2 MB in the beginning and 147.5 MB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:38,919 INFO L168 Benchmark]: TraceAbstraction took 8906.25 ms. Allocated memory was 202.9 MB in the beginning and 312.5 MB in the end (delta: 109.6 MB). Free memory was 146.8 MB in the beginning and 122.3 MB in the end (delta: 24.5 MB). Peak memory consumption was 134.1 MB. Max. memory is 7.1 GB. [2020-09-24 18:11:38,923 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 465.72 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.5 MB in the beginning and 181.6 MB in the end (delta: -80.1 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.61 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 179.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 640.45 ms. Allocated memory is still 202.9 MB. Free memory was 179.2 MB in the beginning and 147.5 MB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8906.25 ms. Allocated memory was 202.9 MB in the beginning and 312.5 MB in the end (delta: 109.6 MB). Free memory was 146.8 MB in the beginning and 122.3 MB in the end (delta: 24.5 MB). Peak memory consumption was 134.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 103, overapproximation of bitwiseAnd at line 101. Possible FailurePath: [L216] unsigned int a ; [L217] unsigned int ma = __VERIFIER_nondet_uint(); [L218] signed char ea = __VERIFIER_nondet_char(); [L219] unsigned int b ; [L220] unsigned int mb = __VERIFIER_nondet_uint(); [L221] signed char eb = __VERIFIER_nondet_char(); [L222] unsigned int r_add1 ; [L223] unsigned int r_add2 ; [L224] unsigned int zero ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int __retres14 ; [L231] CALL, EXPR base2flt(0, 0) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND TRUE ! m [L20] __retres4 = 0U [L70] return (__retres4); [L231] RET, EXPR base2flt(0, 0) [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND TRUE m >= 1U << 25U [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U [L70] return (__retres4); [L232] RET, EXPR base2flt(ma, ea) [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND FALSE !(m >= 1U << 25U) [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res [L70] return (__retres4); [L233] RET, EXPR base2flt(mb, eb) [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; [L84] COND FALSE !(a < b) [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) [L104] CALL __VERIFIER_assert(ea >= eb) [L6] COND TRUE !(cond) [L7] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 169 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 638 SDtfs, 327 SDslu, 5327 SDs, 0 SdLazy, 548 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred 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: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 116 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 433 NumberOfCodeBlocks, 433 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 71409 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 100/106 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...