/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/xor5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:43:24,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:43:24,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:43:24,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:43:24,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:43:24,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:43:24,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:43:24,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:43:24,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:43:24,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:43:24,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:43:24,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:43:24,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:43:24,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:43:24,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:43:24,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:43:24,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:43:24,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:43:24,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:43:24,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:43:24,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:43:24,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:43:24,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:43:24,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:43:24,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:43:24,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:43:24,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:43:24,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:43:24,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:43:24,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:43:24,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:43:24,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:43:24,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:43:24,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:43:24,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:43:24,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:43:24,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:43:24,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:43:24,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:43:24,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:43:24,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:43:24,333 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 [2020-10-28 08:43:24,392 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:43:24,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:43:24,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:43:24,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:43:24,398 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:43:24,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:43:24,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:43:24,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:43:24,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:43:24,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:43:24,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:43:24,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:43:24,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:43:24,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:43:24,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:43:24,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:43:24,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:43:24,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:43:24,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:43:24,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:43:24,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:43:24,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:43:24,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:43:24,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:43:24,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:43:24,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:43:24,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:43:24,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:43:24,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:43:24,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:43:24,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:43:24,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:43:24,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:43:24,850 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:43:24,851 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:43:24,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor5.i [2020-10-28 08:43:24,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f214b873/ea154501ea3c47b68a7d3bdccb65a8fe/FLAGcf93da02f [2020-10-28 08:43:25,546 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:43:25,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/xor5.i [2020-10-28 08:43:25,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f214b873/ea154501ea3c47b68a7d3bdccb65a8fe/FLAGcf93da02f [2020-10-28 08:43:25,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f214b873/ea154501ea3c47b68a7d3bdccb65a8fe [2020-10-28 08:43:25,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:43:25,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:43:25,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:43:25,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:43:25,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:43:25,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:25" (1/1) ... [2020-10-28 08:43:25,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a5f09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:25, skipping insertion in model container [2020-10-28 08:43:25,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:25" (1/1) ... [2020-10-28 08:43:25,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:43:25,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:43:26,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:43:26,198 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:43:26,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:43:26,243 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:43:26,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26 WrapperNode [2020-10-28 08:43:26,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:43:26,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:43:26,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:43:26,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:43:26,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (1/1) ... [2020-10-28 08:43:26,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (1/1) ... [2020-10-28 08:43:26,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (1/1) ... [2020-10-28 08:43:26,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (1/1) ... [2020-10-28 08:43:26,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (1/1) ... [2020-10-28 08:43:26,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (1/1) ... [2020-10-28 08:43:26,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (1/1) ... [2020-10-28 08:43:26,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:43:26,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:43:26,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:43:26,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:43:26,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (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 [2020-10-28 08:43:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:43:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:43:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:43:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2020-10-28 08:43:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:43:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:43:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:43:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:43:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:43:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:43:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:43:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:43:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2020-10-28 08:43:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:43:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:43:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:43:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:43:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:43:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:43:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:43:26,803 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:43:26,803 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 08:43:26,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:26 BoogieIcfgContainer [2020-10-28 08:43:26,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:43:26,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:43:26,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:43:26,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:43:26,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:43:25" (1/3) ... [2020-10-28 08:43:26,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29997e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:26, skipping insertion in model container [2020-10-28 08:43:26,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:26" (2/3) ... [2020-10-28 08:43:26,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29997e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:26, skipping insertion in model container [2020-10-28 08:43:26,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:26" (3/3) ... [2020-10-28 08:43:26,818 INFO L111 eAbstractionObserver]: Analyzing ICFG xor5.i [2020-10-28 08:43:26,835 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:43:26,841 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:43:26,857 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:43:26,918 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:43:26,919 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:43:26,919 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:43:26,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:43:26,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:43:26,919 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:43:26,919 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:43:26,920 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:43:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 08:43:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:43:26,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:26,955 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:43:26,956 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1113226490, now seen corresponding path program 1 times [2020-10-28 08:43:26,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:26,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307573685] [2020-10-28 08:43:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:27,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:27,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:27,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:27,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:30,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:43:30,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:43:30,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3101 [2020-10-28 08:43:30,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:30,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:43:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 08:43:30,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:43:30,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:30,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:30,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:30,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:30,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 08:43:30,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:30,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:30,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:30,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:30,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:30,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:43:30,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 08:43:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:30,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:30,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 08:43:30,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:43:30,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 08:43:30,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:30,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:43:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:30,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:43:30,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:43:30,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 08:43:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:30,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:30,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 08:43:30,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:43:30,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 08:43:30,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:30,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:30,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:43:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:43:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:30,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 08:43:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:30,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:30,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 08:43:30,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:30,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 08:43:30,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:30,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:30,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:43:30,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 08:43:30,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:43:30,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 08:43:30,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307573685] [2020-10-28 08:43:30,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:30,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 08:43:30,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561881540] [2020-10-28 08:43:30,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:43:30,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:43:30,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:43:30,750 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-28 08:43:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:31,203 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-10-28 08:43:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:43:31,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 08:43:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:31,219 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:43:31,219 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 08:43:31,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:43:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 08:43:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 08:43:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:43:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-28 08:43:31,304 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 35 [2020-10-28 08:43:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:31,305 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-28 08:43:31,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:43:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-28 08:43:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:43:31,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:31,311 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:43:31,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:43:31,312 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:31,315 INFO L82 PathProgramCache]: Analyzing trace with hash -236840264, now seen corresponding path program 1 times [2020-10-28 08:43:31,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:31,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013257772] [2020-10-28 08:43:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:31,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:32,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:32,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:43:32,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:43:32,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1581 [2020-10-28 08:43:32,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:32,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:32,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:43:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 08:43:32,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:32,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:33,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:43:33,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:33,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:33,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 08:43:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:33,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:43:33,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 08:43:33,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:43:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 08:43:33,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:33,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 08:43:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:33,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:43:33,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 08:43:33,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:43:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 08:43:33,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 08:43:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:33,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:43:33,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 08:43:33,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 08:43:33,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013257772] [2020-10-28 08:43:33,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:33,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:43:33,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5788057] [2020-10-28 08:43:33,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:43:33,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:33,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:43:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:43:33,125 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-10-28 08:43:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:33,342 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-28 08:43:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:43:33,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-28 08:43:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:33,346 INFO L225 Difference]: With dead ends: 46 [2020-10-28 08:43:33,346 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 08:43:33,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:43:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 08:43:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 08:43:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 08:43:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-28 08:43:33,366 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 41 [2020-10-28 08:43:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:33,368 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-28 08:43:33,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:43:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-28 08:43:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:43:33,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:33,375 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:43:33,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:43:33,375 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash -764173354, now seen corresponding path program 1 times [2020-10-28 08:43:33,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:33,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701357853] [2020-10-28 08:43:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:43:33,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 08:43:33,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:43:33,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:33,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:43:33,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:33,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:43:33,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 08:43:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:33,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:43:33,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 08:43:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 08:43:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:33,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:43:33,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 08:43:33,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 08:43:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:33,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:43:33,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 08:43:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 08:43:33,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701357853] [2020-10-28 08:43:33,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:33,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:43:33,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456756072] [2020-10-28 08:43:33,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:43:33,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:43:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:43:33,609 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-10-28 08:43:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:33,700 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 08:43:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:43:33,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 08:43:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:33,702 INFO L225 Difference]: With dead ends: 55 [2020-10-28 08:43:33,702 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:43:33,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:43:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:43:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 08:43:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 08:43:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 08:43:33,711 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 43 [2020-10-28 08:43:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:33,711 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 08:43:33,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:43:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 08:43:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:43:33,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:33,713 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:43:33,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:43:33,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:33,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1649707432, now seen corresponding path program 1 times [2020-10-28 08:43:33,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:33,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160684205] [2020-10-28 08:43:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:43:33,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-28 08:43:33,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:43:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:43:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:33,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:43:33,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-28 08:43:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:33,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:43:33,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 08:43:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 08:43:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:33,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:33,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:33,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:43:33,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:33,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 08:43:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:33,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:33,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 08:43:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:34,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:34,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:34,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 08:43:34,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:34,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:43:34,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:34,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:34,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:34,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 08:43:34,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:34,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 08:43:34,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160684205] [2020-10-28 08:43:34,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:43:34,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:43:34,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459009084] [2020-10-28 08:43:34,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:43:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:43:34,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:43:34,020 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-10-28 08:43:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:34,174 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-28 08:43:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:43:34,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-28 08:43:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:34,176 INFO L225 Difference]: With dead ends: 56 [2020-10-28 08:43:34,177 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 08:43:34,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:43:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 08:43:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 08:43:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:43:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-28 08:43:34,195 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 45 [2020-10-28 08:43:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:34,196 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-28 08:43:34,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:43:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-28 08:43:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:43:34,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:34,200 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] [2020-10-28 08:43:34,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:43:34,200 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2050535514, now seen corresponding path program 2 times [2020-10-28 08:43:34,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:34,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151963293] [2020-10-28 08:43:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 08:43:34,241 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 08:43:34,242 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 08:43:34,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:43:34,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:43:34 BoogieIcfgContainer [2020-10-28 08:43:34,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 08:43:34,295 INFO L168 Benchmark]: Toolchain (without parser) took 8368.37 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 105.2 MB in the beginning and 89.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 84.5 MB. Max. memory is 8.0 GB. [2020-10-28 08:43:34,296 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 151.0 MB. Free memory is still 122.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 08:43:34,299 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.81 ms. Allocated memory is still 151.0 MB. Free memory was 104.7 MB in the beginning and 94.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 08:43:34,300 INFO L168 Benchmark]: Boogie Preprocessor took 102.65 ms. Allocated memory is still 151.0 MB. Free memory was 94.6 MB in the beginning and 132.6 MB in the end (delta: -38.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2020-10-28 08:43:34,303 INFO L168 Benchmark]: RCFGBuilder took 456.93 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 114.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-10-28 08:43:34,309 INFO L168 Benchmark]: TraceAbstraction took 7483.83 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 114.4 MB in the beginning and 89.1 MB in the end (delta: 25.3 MB). Peak memory consumption was 94.0 MB. Max. memory is 8.0 GB. [2020-10-28 08:43:34,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 151.0 MB. Free memory is still 122.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.81 ms. Allocated memory is still 151.0 MB. Free memory was 104.7 MB in the beginning and 94.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 102.65 ms. Allocated memory is still 151.0 MB. Free memory was 94.6 MB in the beginning and 132.6 MB in the end (delta: -38.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 456.93 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 114.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7483.83 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 114.4 MB in the beginning and 89.1 MB in the end (delta: 25.3 MB). Peak memory consumption was 94.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseXor at line 25. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND FALSE !(i < N) [L45] CALL, EXPR xor(x) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L45] RET, EXPR xor(x) [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L48] CALL, EXPR xor(x) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L48] RET, EXPR xor(x) [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; [L50] COND TRUE i