/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/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:53:11,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:53:11,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:53:11,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:53:11,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:53:11,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:53:11,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:53:11,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:53:11,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:53:11,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:53:11,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:53:11,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:53:11,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:53:11,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:53:11,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:53:11,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:53:11,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:53:11,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:53:11,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:53:11,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:53:11,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:53:11,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:53:11,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:53:11,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:53:11,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:53:11,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:53:11,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:53:11,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:53:11,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:53:11,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:53:11,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:53:11,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:53:11,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:53:11,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:53:11,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:53:11,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:53:11,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:53:11,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:53:11,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:53:11,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:53:11,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:53:11,256 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 14:53:11,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:53:11,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:53:11,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:53:11,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:53:11,287 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:53:11,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:53:11,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:53:11,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:53:11,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:53:11,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:53:11,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:53:11,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:53:11,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:53:11,289 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:53:11,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:53:11,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:53:11,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:53:11,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:53:11,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:53:11,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:53:11,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:53:11,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:11,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:53:11,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:53:11,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:53:11,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:53:11,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:53:11,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:53:11,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:53:11,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:53:11,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:53:11,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:53:11,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:53:11,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:53:11,777 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:53:11,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-10-28 14:53:11,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d15d6ee71/afcdb516d82c4a35bfb9e3dd103fc5a1/FLAG8467fe116 [2020-10-28 14:53:12,521 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:53:12,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-10-28 14:53:12,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d15d6ee71/afcdb516d82c4a35bfb9e3dd103fc5a1/FLAG8467fe116 [2020-10-28 14:53:12,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d15d6ee71/afcdb516d82c4a35bfb9e3dd103fc5a1 [2020-10-28 14:53:12,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:53:12,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:53:12,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:12,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:53:12,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:53:12,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:12" (1/1) ... [2020-10-28 14:53:12,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15dc1b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:12, skipping insertion in model container [2020-10-28 14:53:12,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:12" (1/1) ... [2020-10-28 14:53:12,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:53:12,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:53:13,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:13,105 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:53:13,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:13,155 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:53:13,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13 WrapperNode [2020-10-28 14:53:13,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:13,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:53:13,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:53:13,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:53:13,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:53:13,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:53:13,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:53:13,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:53:13,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (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 14:53:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:53:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:53:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:53:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:53:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:53:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:53:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:53:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:53:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:53:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:53:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:53:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:53:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:53:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:53:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:53:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:53:13,647 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:53:13,648 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:53:13,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:13 BoogieIcfgContainer [2020-10-28 14:53:13,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:53:13,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:53:13,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:53:13,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:53:13,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:53:12" (1/3) ... [2020-10-28 14:53:13,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204cc2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:13, skipping insertion in model container [2020-10-28 14:53:13,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (2/3) ... [2020-10-28 14:53:13,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204cc2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:13, skipping insertion in model container [2020-10-28 14:53:13,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:13" (3/3) ... [2020-10-28 14:53:13,677 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-10-28 14:53:13,690 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:53:13,696 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:53:13,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:53:13,741 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:53:13,741 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:53:13,741 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:53:13,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:53:13,742 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:53:13,742 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:53:13,742 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:53:13,742 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:53:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-28 14:53:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:53:13,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:13,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:13,771 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1452995030, now seen corresponding path program 1 times [2020-10-28 14:53:13,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:13,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667754851] [2020-10-28 14:53:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:53:14,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:14,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-28 14:53:14,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:14,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:14,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:14,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:53:14,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:14,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:14,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 14:53:14,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:14,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:14,423 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 14:53:14,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667754851] [2020-10-28 14:53:14,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:14,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:14,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756304240] [2020-10-28 14:53:14,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:14,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:14,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:14,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:14,476 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-28 14:53:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:14,795 INFO L93 Difference]: Finished difference Result 62 states and 97 transitions. [2020-10-28 14:53:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:14,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 14:53:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:14,810 INFO L225 Difference]: With dead ends: 62 [2020-10-28 14:53:14,811 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:53:14,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:53:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-10-28 14:53:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:53:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2020-10-28 14:53:14,866 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 17 [2020-10-28 14:53:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:14,867 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2020-10-28 14:53:14,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2020-10-28 14:53:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:53:14,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:14,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:14,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:53:14,869 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:14,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:14,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2133053400, now seen corresponding path program 1 times [2020-10-28 14:53:14,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:14,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736057948] [2020-10-28 14:53:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:53:15,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 14:53:15,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:15,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:15,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:15,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:53:15,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:15,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:53:15,192 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 14:53:15,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736057948] [2020-10-28 14:53:15,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:15,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:15,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248365310] [2020-10-28 14:53:15,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:15,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:15,200 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 4 states. [2020-10-28 14:53:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:15,440 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2020-10-28 14:53:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:15,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 14:53:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:15,442 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:53:15,442 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:53:15,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:53:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 14:53:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:53:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 67 transitions. [2020-10-28 14:53:15,457 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 67 transitions. Word has length 17 [2020-10-28 14:53:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:15,457 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 67 transitions. [2020-10-28 14:53:15,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 67 transitions. [2020-10-28 14:53:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:53:15,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:15,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:15,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:53:15,459 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2099831584, now seen corresponding path program 1 times [2020-10-28 14:53:15,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:15,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516937498] [2020-10-28 14:53:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:53:15,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:15,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-28 14:53:15,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:15,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:15,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:15,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:15,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:15,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:53:15,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:15,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:15,775 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 14:53:15,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516937498] [2020-10-28 14:53:15,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:15,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:15,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040924603] [2020-10-28 14:53:15,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:15,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:15,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:15,781 INFO L87 Difference]: Start difference. First operand 42 states and 67 transitions. Second operand 4 states. [2020-10-28 14:53:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:15,938 INFO L93 Difference]: Finished difference Result 65 states and 102 transitions. [2020-10-28 14:53:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:15,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:53:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:15,940 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:53:15,940 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:53:15,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:53:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-28 14:53:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:53:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2020-10-28 14:53:15,952 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2020-10-28 14:53:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:15,952 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2020-10-28 14:53:15,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-10-28 14:53:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:53:15,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:15,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:15,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:53:15,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:15,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1706804574, now seen corresponding path program 1 times [2020-10-28 14:53:15,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:15,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057606298] [2020-10-28 14:53:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:53:16,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 14:53:16,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:16,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:16,052 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 14:53:16,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057606298] [2020-10-28 14:53:16,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968977266] [2020-10-28 14:53:16,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,055 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand 4 states. [2020-10-28 14:53:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,171 INFO L93 Difference]: Finished difference Result 113 states and 182 transitions. [2020-10-28 14:53:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:53:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,173 INFO L225 Difference]: With dead ends: 113 [2020-10-28 14:53:16,173 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:53:16,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:53:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 14:53:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:53:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 118 transitions. [2020-10-28 14:53:16,186 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 118 transitions. Word has length 18 [2020-10-28 14:53:16,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,187 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 118 transitions. [2020-10-28 14:53:16,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,187 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 118 transitions. [2020-10-28 14:53:16,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:53:16,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:16,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:53:16,189 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1026746204, now seen corresponding path program 1 times [2020-10-28 14:53:16,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78740160] [2020-10-28 14:53:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:53:16,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 14:53:16,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:16,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:16,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,288 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 14:53:16,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78740160] [2020-10-28 14:53:16,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127208969] [2020-10-28 14:53:16,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,291 INFO L87 Difference]: Start difference. First operand 76 states and 118 transitions. Second operand 4 states. [2020-10-28 14:53:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,409 INFO L93 Difference]: Finished difference Result 96 states and 149 transitions. [2020-10-28 14:53:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:53:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,412 INFO L225 Difference]: With dead ends: 96 [2020-10-28 14:53:16,412 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 14:53:16,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 14:53:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-28 14:53:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:53:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2020-10-28 14:53:16,435 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 18 [2020-10-28 14:53:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,436 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2020-10-28 14:53:16,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2020-10-28 14:53:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:53:16,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:16,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:53:16,440 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1378003427, now seen corresponding path program 1 times [2020-10-28 14:53:16,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511455388] [2020-10-28 14:53:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:53:16,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 14:53:16,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:16,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:16,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:16,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,591 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 14:53:16,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511455388] [2020-10-28 14:53:16,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959689391] [2020-10-28 14:53:16,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,594 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand 4 states. [2020-10-28 14:53:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,702 INFO L93 Difference]: Finished difference Result 132 states and 205 transitions. [2020-10-28 14:53:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:53:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,704 INFO L225 Difference]: With dead ends: 132 [2020-10-28 14:53:16,704 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:53:16,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:53:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2020-10-28 14:53:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 14:53:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 158 transitions. [2020-10-28 14:53:16,716 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 158 transitions. Word has length 19 [2020-10-28 14:53:16,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,717 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 158 transitions. [2020-10-28 14:53:16,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 158 transitions. [2020-10-28 14:53:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:53:16,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:16,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:53:16,719 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2058061797, now seen corresponding path program 1 times [2020-10-28 14:53:16,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820122825] [2020-10-28 14:53:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:53:16,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 14:53:16,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:16,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:16,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:16,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,811 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 14:53:16,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820122825] [2020-10-28 14:53:16,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527269377] [2020-10-28 14:53:16,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,814 INFO L87 Difference]: Start difference. First operand 104 states and 158 transitions. Second operand 4 states. [2020-10-28 14:53:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,913 INFO L93 Difference]: Finished difference Result 232 states and 357 transitions. [2020-10-28 14:53:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:53:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,915 INFO L225 Difference]: With dead ends: 232 [2020-10-28 14:53:16,915 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 14:53:16,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 14:53:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-28 14:53:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 14:53:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 200 transitions. [2020-10-28 14:53:16,929 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 200 transitions. Word has length 19 [2020-10-28 14:53:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,929 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 200 transitions. [2020-10-28 14:53:16,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 200 transitions. [2020-10-28 14:53:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:53:16,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,931 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] [2020-10-28 14:53:16,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:53:16,931 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash -224886967, now seen corresponding path program 1 times [2020-10-28 14:53:16,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855039977] [2020-10-28 14:53:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:53:17,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:17,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 14:53:17,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:17,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:17,119 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 14:53:17,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855039977] [2020-10-28 14:53:17,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139984704] [2020-10-28 14:53:17,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,123 INFO L87 Difference]: Start difference. First operand 136 states and 200 transitions. Second operand 4 states. [2020-10-28 14:53:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:17,253 INFO L93 Difference]: Finished difference Result 232 states and 343 transitions. [2020-10-28 14:53:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:17,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:53:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:17,256 INFO L225 Difference]: With dead ends: 232 [2020-10-28 14:53:17,256 INFO L226 Difference]: Without dead ends: 229 [2020-10-28 14:53:17,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-28 14:53:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 196. [2020-10-28 14:53:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 14:53:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 284 transitions. [2020-10-28 14:53:17,271 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 284 transitions. Word has length 20 [2020-10-28 14:53:17,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,271 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 284 transitions. [2020-10-28 14:53:17,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 284 transitions. [2020-10-28 14:53:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:53:17,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,273 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] [2020-10-28 14:53:17,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:53:17,274 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,275 INFO L82 PathProgramCache]: Analyzing trace with hash 455171403, now seen corresponding path program 1 times [2020-10-28 14:53:17,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040984997] [2020-10-28 14:53:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:53:17,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:17,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 14:53:17,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:17,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:17,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:17,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,424 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 14:53:17,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040984997] [2020-10-28 14:53:17,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049343300] [2020-10-28 14:53:17,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,426 INFO L87 Difference]: Start difference. First operand 196 states and 284 transitions. Second operand 4 states. [2020-10-28 14:53:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:17,539 INFO L93 Difference]: Finished difference Result 440 states and 639 transitions. [2020-10-28 14:53:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:17,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:53:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:17,542 INFO L225 Difference]: With dead ends: 440 [2020-10-28 14:53:17,542 INFO L226 Difference]: Without dead ends: 253 [2020-10-28 14:53:17,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-28 14:53:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-10-28 14:53:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-28 14:53:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 348 transitions. [2020-10-28 14:53:17,559 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 348 transitions. Word has length 20 [2020-10-28 14:53:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,560 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 348 transitions. [2020-10-28 14:53:17,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 348 transitions. [2020-10-28 14:53:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:17,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,562 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] [2020-10-28 14:53:17,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:53:17,563 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1625128942, now seen corresponding path program 1 times [2020-10-28 14:53:17,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254673992] [2020-10-28 14:53:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:17,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:17,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 14:53:17,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:17,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:17,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:17,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,775 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 14:53:17,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254673992] [2020-10-28 14:53:17,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059642095] [2020-10-28 14:53:17,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,777 INFO L87 Difference]: Start difference. First operand 252 states and 348 transitions. Second operand 4 states. [2020-10-28 14:53:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:17,893 INFO L93 Difference]: Finished difference Result 415 states and 566 transitions. [2020-10-28 14:53:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:17,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:53:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:17,896 INFO L225 Difference]: With dead ends: 415 [2020-10-28 14:53:17,896 INFO L226 Difference]: Without dead ends: 412 [2020-10-28 14:53:17,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-28 14:53:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 380. [2020-10-28 14:53:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-28 14:53:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 516 transitions. [2020-10-28 14:53:17,940 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 516 transitions. Word has length 21 [2020-10-28 14:53:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,940 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 516 transitions. [2020-10-28 14:53:17,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 516 transitions. [2020-10-28 14:53:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:17,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,942 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] [2020-10-28 14:53:17,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:53:17,942 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1989779984, now seen corresponding path program 1 times [2020-10-28 14:53:17,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266957599] [2020-10-28 14:53:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:18,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:18,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 14:53:18,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:18,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:18,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:18,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:18,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:18,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:18,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:18,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,145 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 14:53:18,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266957599] [2020-10-28 14:53:18,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:18,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:18,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880565968] [2020-10-28 14:53:18,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:18,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:18,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:18,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:18,147 INFO L87 Difference]: Start difference. First operand 380 states and 516 transitions. Second operand 4 states. [2020-10-28 14:53:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:18,257 INFO L93 Difference]: Finished difference Result 574 states and 779 transitions. [2020-10-28 14:53:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:18,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:53:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:18,260 INFO L225 Difference]: With dead ends: 574 [2020-10-28 14:53:18,260 INFO L226 Difference]: Without dead ends: 395 [2020-10-28 14:53:18,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-28 14:53:18,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 394. [2020-10-28 14:53:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-28 14:53:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 520 transitions. [2020-10-28 14:53:18,280 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 520 transitions. Word has length 21 [2020-10-28 14:53:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:18,281 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 520 transitions. [2020-10-28 14:53:18,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 520 transitions. [2020-10-28 14:53:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:18,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:18,282 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] [2020-10-28 14:53:18,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:53:18,283 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1912160302, now seen corresponding path program 1 times [2020-10-28 14:53:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:18,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729475254] [2020-10-28 14:53:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:18,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:18,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 14:53:18,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:18,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:18,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:18,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:18,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:18,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:18,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:18,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,402 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 14:53:18,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729475254] [2020-10-28 14:53:18,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:18,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:18,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879356862] [2020-10-28 14:53:18,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:18,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:18,405 INFO L87 Difference]: Start difference. First operand 394 states and 520 transitions. Second operand 4 states. [2020-10-28 14:53:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:18,526 INFO L93 Difference]: Finished difference Result 858 states and 1112 transitions. [2020-10-28 14:53:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:18,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:53:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:18,527 INFO L225 Difference]: With dead ends: 858 [2020-10-28 14:53:18,527 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:53:18,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:53:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:53:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:53:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:53:18,530 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-28 14:53:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:18,530 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:53:18,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:53:18,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:53:18,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:53:18,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 14:53:18,927 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 32 [2020-10-28 14:53:18,987 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 14:53:18,987 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 14:53:18,987 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 14:53:18,987 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 14:53:18,987 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:53:18,988 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-28 14:53:18,988 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:53:18,988 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:53:18,988 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 14:53:18,988 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 14:53:18,988 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:53:18,988 INFO L274 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-10-28 14:53:18,988 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 95) no Hoare annotation was computed. [2020-10-28 14:53:18,989 INFO L277 CegarLoopResult]: At program point L85-1(lines 26 90) the Hoare annotation is: true [2020-10-28 14:53:18,990 INFO L274 CegarLoopResult]: For program point L81(line 81) no Hoare annotation was computed. [2020-10-28 14:53:18,990 INFO L274 CegarLoopResult]: For program point L65-1(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:18,990 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-10-28 14:53:18,990 INFO L274 CegarLoopResult]: For program point L86(line 86) no Hoare annotation was computed. [2020-10-28 14:53:18,990 INFO L270 CegarLoopResult]: At program point L86-1(lines 7 95) the Hoare annotation is: false [2020-10-28 14:53:18,990 INFO L274 CegarLoopResult]: For program point L70-1(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:18,991 INFO L274 CegarLoopResult]: For program point L66(line 66) no Hoare annotation was computed. [2020-10-28 14:53:18,991 INFO L277 CegarLoopResult]: At program point L91(lines 7 95) the Hoare annotation is: true [2020-10-28 14:53:18,991 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 95) no Hoare annotation was computed. [2020-10-28 14:53:18,991 INFO L274 CegarLoopResult]: For program point L75-1(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:18,991 INFO L274 CegarLoopResult]: For program point L71(line 71) no Hoare annotation was computed. [2020-10-28 14:53:18,991 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 95) the Hoare annotation is: true [2020-10-28 14:53:18,991 INFO L274 CegarLoopResult]: For program point L59-1(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:18,991 INFO L274 CegarLoopResult]: For program point L55-1(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:18,992 INFO L274 CegarLoopResult]: For program point L51-1(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:18,992 INFO L274 CegarLoopResult]: For program point L80-1(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:18,992 INFO L274 CegarLoopResult]: For program point L47-1(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:18,992 INFO L274 CegarLoopResult]: For program point L76(line 76) no Hoare annotation was computed. [2020-10-28 14:53:18,992 INFO L274 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-10-28 14:53:18,993 INFO L274 CegarLoopResult]: For program point L43-2(lines 26 90) no Hoare annotation was computed. [2020-10-28 14:53:19,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:53:19 BoogieIcfgContainer [2020-10-28 14:53:19,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:53:19,009 INFO L168 Benchmark]: Toolchain (without parser) took 6130.85 ms. Allocated memory was 154.1 MB in the beginning and 242.2 MB in the end (delta: 88.1 MB). Free memory was 129.9 MB in the beginning and 162.4 MB in the end (delta: -32.6 MB). Peak memory consumption was 108.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:19,013 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:53:19,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.75 ms. Allocated memory is still 154.1 MB. Free memory was 129.3 MB in the beginning and 119.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:19,015 INFO L168 Benchmark]: Boogie Preprocessor took 45.28 ms. Allocated memory is still 154.1 MB. Free memory was 119.7 MB in the beginning and 118.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:19,017 INFO L168 Benchmark]: RCFGBuilder took 444.90 ms. Allocated memory is still 154.1 MB. Free memory was 118.2 MB in the beginning and 102.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:19,023 INFO L168 Benchmark]: TraceAbstraction took 5354.57 ms. Allocated memory was 154.1 MB in the beginning and 242.2 MB in the end (delta: 88.1 MB). Free memory was 101.9 MB in the beginning and 162.4 MB in the end (delta: -60.6 MB). Peak memory consumption was 81.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:19,029 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.75 ms. Allocated memory is still 154.1 MB. Free memory was 129.3 MB in the beginning and 119.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.28 ms. Allocated memory is still 154.1 MB. Free memory was 119.7 MB in the beginning and 118.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 444.90 ms. Allocated memory is still 154.1 MB. Free memory was 118.2 MB in the beginning and 102.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5354.57 ms. Allocated memory was 154.1 MB in the beginning and 242.2 MB in the end (delta: 88.1 MB). Free memory was 101.9 MB in the beginning and 162.4 MB in the end (delta: -60.6 MB). Peak memory consumption was 81.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 12, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 577 SDtfs, 754 SDslu, 94 SDs, 0 SdLazy, 420 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=394occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 124 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 54 NumberOfFragments, 38 HoareAnnotationTreeSize, 19 FomulaSimplifications, 52182 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 229 NumberOfCodeBlocks, 229 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 217 ConstructedInterpolants, 0 QuantifiedInterpolants, 12994 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...