/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-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:10:40,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:10:40,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:10:40,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:10:40,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:10:40,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:10:40,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:10:40,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:10:40,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:10:40,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:10:40,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:10:40,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:10:40,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:10:40,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:10:40,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:10:40,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:10:40,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:10:40,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:10:40,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:10:40,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:10:40,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:10:40,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:10:40,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:10:40,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:10:40,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:10:40,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:10:40,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:10:40,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:10:40,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:10:40,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:10:40,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:10:40,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:10:40,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:10:40,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:10:40,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:10:40,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:10:40,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:10:40,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:10:40,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:10:40,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:10:40,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:10:40,191 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 09:10:40,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:10:40,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:10:40,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:10:40,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:10:40,223 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:10:40,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:10:40,224 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:10:40,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:10:40,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:10:40,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:10:40,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:10:40,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:10:40,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:10:40,226 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:10:40,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:10:40,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:10:40,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:10:40,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:10:40,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:10:40,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:10:40,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:10:40,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:10:40,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:10:40,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:10:40,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:10:40,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:10:40,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:10:40,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:10:40,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:10:40,230 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:10:40,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:10:40,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:10:40,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:10:40,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:10:40,697 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:10:40,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-10-28 09:10:40,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dac95471/bf9d2c303a224f1894f2f7aa458cb22f/FLAG7657f5a9b [2020-10-28 09:10:41,572 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:10:41,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-10-28 09:10:41,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dac95471/bf9d2c303a224f1894f2f7aa458cb22f/FLAG7657f5a9b [2020-10-28 09:10:41,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dac95471/bf9d2c303a224f1894f2f7aa458cb22f [2020-10-28 09:10:41,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:10:41,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:10:41,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:10:41,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:10:41,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:10:41,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:10:41" (1/1) ... [2020-10-28 09:10:41,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220032e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:41, skipping insertion in model container [2020-10-28 09:10:41,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:10:41" (1/1) ... [2020-10-28 09:10:41,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:10:41,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:10:42,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:10:42,158 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:10:42,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:10:42,201 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:10:42,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42 WrapperNode [2020-10-28 09:10:42,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:10:42,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:10:42,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:10:42,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:10:42,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:10:42,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:10:42,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:10:42,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:10:42,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (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 09:10:42,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:10:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:10:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:10:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:10:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:10:42,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:10:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:10:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:10:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:10:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:10:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:10:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:10:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:10:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:10:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:10:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:10:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:10:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:10:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:10:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:10:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:10:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:10:42,948 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:10:42,948 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:10:42,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:10:42 BoogieIcfgContainer [2020-10-28 09:10:42,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:10:42,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:10:42,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:10:42,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:10:42,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:10:41" (1/3) ... [2020-10-28 09:10:42,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f36954a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:10:42, skipping insertion in model container [2020-10-28 09:10:42,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (2/3) ... [2020-10-28 09:10:42,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f36954a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:10:42, skipping insertion in model container [2020-10-28 09:10:42,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:10:42" (3/3) ... [2020-10-28 09:10:43,002 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-10-28 09:10:43,050 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:10:43,063 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:10:43,082 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:10:43,135 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:10:43,135 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:10:43,135 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:10:43,136 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:10:43,136 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:10:43,136 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:10:43,136 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:10:43,136 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:10:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 09:10:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:10:43,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:43,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:43,173 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-28 09:10:43,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:43,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725871655] [2020-10-28 09:10:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:43,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:43,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:10:43,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:43,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-28 09:10:43,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:43,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:10:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:43,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 09:10:43,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:43,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:43,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:43,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:43,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 09:10:43,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:43,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:43,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:43,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:43,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:43,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:43,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:43,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:43,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:43,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:10:43,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:43,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:43,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:10:43,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725871655] [2020-10-28 09:10:43,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:43,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:10:43,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666451038] [2020-10-28 09:10:43,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:10:43,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:10:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:10:43,906 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-28 09:10:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:44,075 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-28 09:10:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:10:44,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-28 09:10:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:44,085 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:10:44,085 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 09:10:44,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:10:44,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 09:10:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 09:10:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:10:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 09:10:44,135 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-28 09:10:44,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:44,135 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 09:10:44,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:10:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 09:10:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:10:44,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:44,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:44,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:10:44,137 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-28 09:10:44,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:44,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152423845] [2020-10-28 09:10:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:44,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:44,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:10:44,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:44,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-28 09:10:44,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:44,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:44,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:10:44,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:10:44,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:10:44,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 09:10:44,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:44,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:44,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:44,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:44,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:10:44,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:44,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:44,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:44,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:44,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:44,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:44,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:44,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:44,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:44,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:10:44,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:44,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:44,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:44,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:44,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:44,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:10:44,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152423845] [2020-10-28 09:10:44,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:44,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:10:44,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378765493] [2020-10-28 09:10:44,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:10:44,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:10:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:10:44,761 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-28 09:10:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:44,995 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-28 09:10:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:10:44,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 09:10:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:44,997 INFO L225 Difference]: With dead ends: 40 [2020-10-28 09:10:44,997 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:10:44,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:10:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 09:10:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:10:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 09:10:45,008 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2020-10-28 09:10:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:45,009 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 09:10:45,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:10:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 09:10:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:10:45,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:45,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:45,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:10:45,011 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-28 09:10:45,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:45,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876842094] [2020-10-28 09:10:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:45,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:10:45,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 969 [2020-10-28 09:10:45,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:46,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:46,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:46,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:10:46,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:10:46,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:46,139 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-28 09:10:46,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:46,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:46,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:46,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:46,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:10:46,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:46,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:46,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:46,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:46,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:46,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:46,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:46,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:46,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:46,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:46,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:10:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876842094] [2020-10-28 09:10:46,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:46,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:10:46,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61014709] [2020-10-28 09:10:46,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:10:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:46,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:10:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:10:46,179 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 4 states. [2020-10-28 09:10:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:46,353 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-28 09:10:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:10:46,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 09:10:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:46,358 INFO L225 Difference]: With dead ends: 48 [2020-10-28 09:10:46,358 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:10:46,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:10:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:10:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-28 09:10:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:10:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 09:10:46,372 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2020-10-28 09:10:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:46,374 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 09:10:46,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:10:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 09:10:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:10:46,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:46,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:46,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:10:46,378 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:46,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-28 09:10:46,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:46,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646559592] [2020-10-28 09:10:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:46,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:47,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:10:47,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-28 09:10:47,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:47,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:10:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:10:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:10:47,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:47,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:47,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:47,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:47,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:47,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:47,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:47,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:47,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:47,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:47,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:47,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:47,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:47,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:47,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:47,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:47,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:47,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:47,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:47,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:10:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646559592] [2020-10-28 09:10:47,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:47,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 09:10:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486567756] [2020-10-28 09:10:47,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:10:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:10:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:47,205 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2020-10-28 09:10:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:47,687 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-28 09:10:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:10:47,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 09:10:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:47,689 INFO L225 Difference]: With dead ends: 41 [2020-10-28 09:10:47,689 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 09:10:47,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:10:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 09:10:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-28 09:10:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 09:10:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-28 09:10:47,705 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2020-10-28 09:10:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:47,706 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-28 09:10:47,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:10:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-28 09:10:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:10:47,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:47,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:47,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:10:47,708 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 427046459, now seen corresponding path program 1 times [2020-10-28 09:10:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:47,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259092271] [2020-10-28 09:10:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:47,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:50,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:10:50,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:10:50,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2414 [2020-10-28 09:10:50,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:50,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:10:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:10:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:10:50,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:50,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:50,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:50,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:50,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:50,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:10:50,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:50,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:50,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:50,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:50,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:50,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:50,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:50,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:50,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:50,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:50,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:50,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:50,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:50,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:10:50,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259092271] [2020-10-28 09:10:50,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:50,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:10:50,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431203850] [2020-10-28 09:10:50,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:10:50,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:50,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:10:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:50,357 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-10-28 09:10:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:50,699 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-28 09:10:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:10:50,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-28 09:10:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:50,701 INFO L225 Difference]: With dead ends: 54 [2020-10-28 09:10:50,701 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:10:50,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:10:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:10:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-28 09:10:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:10:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 09:10:50,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2020-10-28 09:10:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:50,710 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 09:10:50,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:10:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 09:10:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:10:50,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:50,711 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:10:50,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:10:50,712 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:50,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914284, now seen corresponding path program 1 times [2020-10-28 09:10:50,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:50,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90180841] [2020-10-28 09:10:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:50,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:52,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:52,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:52,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:52,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:55,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 09:10:55,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 09:10:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:10:55,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:55,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:55,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:10:55,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:10:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:10:55,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:56,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:56,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:56,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:56,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:56,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:56,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:56,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:56,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:56,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:56,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:56,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:56,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:56,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:56,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:56,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:56,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:56,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:56,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:56,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:56,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:56,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:56,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:56,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:10:56,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90180841] [2020-10-28 09:10:56,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:56,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:10:56,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575077684] [2020-10-28 09:10:56,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:10:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:10:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:10:56,390 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 17 states. [2020-10-28 09:10:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:57,510 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-28 09:10:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:10:57,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-28 09:10:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:57,513 INFO L225 Difference]: With dead ends: 55 [2020-10-28 09:10:57,513 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 09:10:57,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:10:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 09:10:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-28 09:10:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 09:10:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-28 09:10:57,524 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 34 [2020-10-28 09:10:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:57,524 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-28 09:10:57,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:10:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-28 09:10:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:10:57,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:57,526 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:10:57,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:10:57,526 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1090575102, now seen corresponding path program 2 times [2020-10-28 09:10:57,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:57,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462316457] [2020-10-28 09:10:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:57,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:58,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:58,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:58,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:58,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:59,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:59,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:00,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:02,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 09:11:02,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:11:02,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:11:02,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:02,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:02,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:11:02,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:02,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:11:02,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:11:02,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:02,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:02,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:02,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:02,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:11:02,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:02,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:02,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:02,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:02,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:02,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:02,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:02,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:02,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:02,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:02,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:02,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:02,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:02,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:11:02,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462316457] [2020-10-28 09:11:02,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:02,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:11:02,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658783008] [2020-10-28 09:11:02,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:11:02,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:11:02,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:11:02,780 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 13 states. [2020-10-28 09:11:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:03,535 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-28 09:11:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:11:03,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-28 09:11:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:03,540 INFO L225 Difference]: With dead ends: 85 [2020-10-28 09:11:03,540 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:11:03,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:11:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:11:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2020-10-28 09:11:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 09:11:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-28 09:11:03,554 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 37 [2020-10-28 09:11:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:03,554 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-28 09:11:03,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:11:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-28 09:11:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:11:03,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:03,556 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:11:03,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:11:03,556 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:03,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:03,557 INFO L82 PathProgramCache]: Analyzing trace with hash -99928167, now seen corresponding path program 3 times [2020-10-28 09:11:03,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:03,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059475453] [2020-10-28 09:11:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:03,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:04,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:06,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:08,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:08,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:08,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 09:11:08,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 09:11:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:11:08,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:08,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:08,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:11:08,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:08,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:11:08,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:08,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:08,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:08,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:08,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:08,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:08,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:11:08,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:08,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:08,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:08,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:08,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:08,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:08,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:08,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:08,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:08,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:08,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:08,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:11:08,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059475453] [2020-10-28 09:11:08,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:08,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:11:08,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895344689] [2020-10-28 09:11:08,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:11:08,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:08,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:11:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:11:08,855 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 13 states. [2020-10-28 09:11:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:09,508 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-28 09:11:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:11:09,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-28 09:11:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:09,510 INFO L225 Difference]: With dead ends: 121 [2020-10-28 09:11:09,511 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 09:11:09,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:11:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 09:11:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-28 09:11:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:11:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-28 09:11:09,520 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 37 [2020-10-28 09:11:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:09,520 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-28 09:11:09,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:11:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-28 09:11:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:11:09,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:09,526 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:11:09,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:11:09,526 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash 553320601, now seen corresponding path program 4 times [2020-10-28 09:11:09,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:09,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149002610] [2020-10-28 09:11:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 09:11:09,559 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 09:11:09,560 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 09:11:09,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:11:09,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:11:09 BoogieIcfgContainer [2020-10-28 09:11:09,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 09:11:09,602 INFO L168 Benchmark]: Toolchain (without parser) took 27683.10 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 127.1 MB in the beginning and 191.8 MB in the end (delta: -64.7 MB). Peak memory consumption was 164.8 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:09,603 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 152.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 09:11:09,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.21 ms. Allocated memory is still 152.0 MB. Free memory was 126.5 MB in the beginning and 116.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:09,606 INFO L168 Benchmark]: Boogie Preprocessor took 43.08 ms. Allocated memory is still 152.0 MB. Free memory was 116.6 MB in the beginning and 115.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:09,607 INFO L168 Benchmark]: RCFGBuilder took 704.16 ms. Allocated memory is still 152.0 MB. Free memory was 115.0 MB in the beginning and 98.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:09,611 INFO L168 Benchmark]: TraceAbstraction took 26610.07 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 135.1 MB in the beginning and 191.8 MB in the end (delta: -56.7 MB). Peak memory consumption was 171.6 MB. Max. memory is 8.0 GB. [2020-10-28 09:11:09,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 152.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.21 ms. Allocated memory is still 152.0 MB. Free memory was 126.5 MB in the beginning and 116.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.08 ms. Allocated memory is still 152.0 MB. Free memory was 116.6 MB in the beginning and 115.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 704.16 ms. Allocated memory is still 152.0 MB. Free memory was 115.0 MB in the beginning and 98.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26610.07 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 135.1 MB in the beginning and 191.8 MB in the end (delta: -56.7 MB). Peak memory consumption was 171.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 [L31] COND TRUE i