/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=SHALLOWEST --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/loops/veris.c_sendmail_tTflag_arr_one_loop.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:59:21,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:59:21,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:59:21,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:59:21,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:59:21,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:59:21,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:59:21,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:59:21,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:59:21,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:59:21,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:59:21,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:59:21,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:59:21,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:59:21,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:59:21,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:59:21,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:59:21,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:59:21,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:59:21,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:59:21,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:59:21,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:59:21,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:59:21,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:59:21,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:59:21,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:59:21,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:59:21,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:59:21,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:59:21,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 01:59:21,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:59:21,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:59:21,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:59:21,321 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 [2020-10-27 01:59:21,348 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:59:21,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:59:21,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:59:21,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:59:21,351 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:59:21,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:59:21,352 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:59:21,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:59:21,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:59:21,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:59:21,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:59:21,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:59:21,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:59:21,353 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:59:21,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:59:21,354 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:59:21,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:59:21,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:59:21,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:59:21,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:59:21,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:59:21,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:59:21,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:59:21,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:59:21,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:59:21,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:59:21,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:59:21,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:59:21,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:59:21,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:59:21,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:59:21,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:59:21,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:59:21,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:59:21,809 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:59:21,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_sendmail_tTflag_arr_one_loop.c [2020-10-27 01:59:21,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21f8bab2e/84a4947af39543798670c333e85f609f/FLAG08bfbede7 [2020-10-27 01:59:22,455 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:59:22,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_sendmail_tTflag_arr_one_loop.c [2020-10-27 01:59:22,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21f8bab2e/84a4947af39543798670c333e85f609f/FLAG08bfbede7 [2020-10-27 01:59:22,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21f8bab2e/84a4947af39543798670c333e85f609f [2020-10-27 01:59:22,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:59:22,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:59:22,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:59:22,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:59:22,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:59:22,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:59:22" (1/1) ... [2020-10-27 01:59:22,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4837fcc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:22, skipping insertion in model container [2020-10-27 01:59:22,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:59:22" (1/1) ... [2020-10-27 01:59:22,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:59:22,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:59:23,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:59:23,060 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:59:23,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:59:23,100 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:59:23,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23 WrapperNode [2020-10-27 01:59:23,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:59:23,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:59:23,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:59:23,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:59:23,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (1/1) ... [2020-10-27 01:59:23,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (1/1) ... [2020-10-27 01:59:23,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (1/1) ... [2020-10-27 01:59:23,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (1/1) ... [2020-10-27 01:59:23,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (1/1) ... [2020-10-27 01:59:23,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (1/1) ... [2020-10-27 01:59:23,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (1/1) ... [2020-10-27 01:59:23,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:59:23,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:59:23,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:59:23,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:59:23,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (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 [2020-10-27 01:59:23,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:59:23,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:59:23,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:59:23,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:59:23,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:59:23,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:59:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:59:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:59:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:59:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 01:59:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:59:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:59:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:59:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:59:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:59:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:59:23,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:59:23,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:59:23,677 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:59:23,677 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:59:23,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:59:23 BoogieIcfgContainer [2020-10-27 01:59:23,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:59:23,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:59:23,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:59:23,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:59:23,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:59:22" (1/3) ... [2020-10-27 01:59:23,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471caaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:59:23, skipping insertion in model container [2020-10-27 01:59:23,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:23" (2/3) ... [2020-10-27 01:59:23,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471caaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:59:23, skipping insertion in model container [2020-10-27 01:59:23,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:59:23" (3/3) ... [2020-10-27 01:59:23,699 INFO L111 eAbstractionObserver]: Analyzing ICFG veris.c_sendmail_tTflag_arr_one_loop.c [2020-10-27 01:59:23,717 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:59:23,722 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:59:23,737 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:59:23,786 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:59:23,786 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:59:23,786 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:59:23,786 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:59:23,786 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:59:23,787 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:59:23,787 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:59:23,787 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:59:23,812 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 01:59:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:59:23,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:23,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:23,820 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:23,830 INFO L82 PathProgramCache]: Analyzing trace with hash 32088636, now seen corresponding path program 1 times [2020-10-27 01:59:23,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:23,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362423760] [2020-10-27 01:59:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:24,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:24,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:24,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:59:24,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:24,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-27 01:59:24,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:59:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:59:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:59:24,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:24,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:24,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:24,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:24,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:59:24,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:24,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:24,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362423760] [2020-10-27 01:59:24,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:59:24,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:59:24,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496835807] [2020-10-27 01:59:24,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:59:24,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:59:24,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:59:24,818 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 4 states. [2020-10-27 01:59:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:24,960 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-27 01:59:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:59:24,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 01:59:24,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:24,971 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:59:24,971 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:59:24,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:59:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:59:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-27 01:59:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:59:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 01:59:25,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-27 01:59:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:25,017 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 01:59:25,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:59:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 01:59:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:59:25,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:25,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:25,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:59:25,019 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:25,020 INFO L82 PathProgramCache]: Analyzing trace with hash -82318882, now seen corresponding path program 1 times [2020-10-27 01:59:25,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:25,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031215227] [2020-10-27 01:59:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:25,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:25,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:59:25,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:25,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-27 01:59:25,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:25,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:59:25,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:25,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:59:25,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:25,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:25,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:25,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:25,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:25,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:59:25,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:25,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:25,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:25,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031215227] [2020-10-27 01:59:25,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:25,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:59:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889253878] [2020-10-27 01:59:25,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:59:25,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:25,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:59:25,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:59:25,473 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 01:59:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:25,561 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 01:59:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:59:25,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:59:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:25,563 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:59:25,564 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:59:25,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:59:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:59:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-27 01:59:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:59:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 01:59:25,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-27 01:59:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:25,572 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 01:59:25,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:59:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 01:59:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:59:25,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:25,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:25,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:59:25,574 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1641206016, now seen corresponding path program 2 times [2020-10-27 01:59:25,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:25,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876096396] [2020-10-27 01:59:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:25,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:25,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:59:25,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 01:59:25,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:59:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:59:25,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:26,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:26,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:26,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:26,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:26,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:59:26,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:26,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:26,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:26,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:26,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:26,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876096396] [2020-10-27 01:59:26,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:26,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:59:26,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751282161] [2020-10-27 01:59:26,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:59:26,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:59:26,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:59:26,189 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-27 01:59:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:26,348 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 01:59:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:59:26,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:59:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:26,350 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:59:26,351 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:59:26,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:59:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:59:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-27 01:59:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:59:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 01:59:26,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-27 01:59:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:26,359 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 01:59:26,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:59:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 01:59:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:59:26,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:26,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:26,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:59:26,365 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:26,366 INFO L82 PathProgramCache]: Analyzing trace with hash 91256738, now seen corresponding path program 3 times [2020-10-27 01:59:26,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:26,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198863058] [2020-10-27 01:59:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:26,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:26,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:59:26,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:26,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 01:59:26,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:26,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:59:26,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:26,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:59:26,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:26,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:26,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:26,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:26,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:26,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:59:26,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:26,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:26,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:26,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:26,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:26,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198863058] [2020-10-27 01:59:26,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:26,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:59:26,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982091040] [2020-10-27 01:59:26,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:59:26,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:59:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:59:26,954 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-27 01:59:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:27,066 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-27 01:59:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:59:27,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:59:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:27,068 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:59:27,068 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:59:27,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:59:27,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:59:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 01:59:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:59:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 01:59:27,075 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-27 01:59:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:27,076 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 01:59:27,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:59:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 01:59:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:59:27,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:27,077 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:27,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:59:27,077 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash 943652292, now seen corresponding path program 4 times [2020-10-27 01:59:27,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:27,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996886735] [2020-10-27 01:59:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:27,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:27,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:59:27,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:27,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-27 01:59:27,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:27,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:59:27,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:27,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:59:27,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:27,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:27,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:27,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:27,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:59:27,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:27,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:27,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:27,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:27,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:27,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996886735] [2020-10-27 01:59:27,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:27,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:59:27,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826411684] [2020-10-27 01:59:27,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:59:27,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:27,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:59:27,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:59:27,943 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-27 01:59:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:28,110 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 01:59:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:59:28,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:59:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:28,112 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:59:28,112 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:59:28,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:59:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:59:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-27 01:59:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:59:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 01:59:28,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-27 01:59:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:28,124 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 01:59:28,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:59:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 01:59:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:59:28,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:28,126 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:28,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:59:28,126 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash -242973850, now seen corresponding path program 5 times [2020-10-27 01:59:28,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:28,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394600804] [2020-10-27 01:59:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:28,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:29,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:59:29,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:29,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-27 01:59:29,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:29,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:59:29,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:29,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:59:29,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:29,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:29,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:29,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:29,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:59:29,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:29,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:29,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394600804] [2020-10-27 01:59:29,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:29,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:59:29,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483982173] [2020-10-27 01:59:29,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:59:29,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:59:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:59:29,244 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-27 01:59:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:29,389 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 01:59:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:59:29,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:59:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:29,392 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:59:29,392 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:59:29,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:59:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:59:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 01:59:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:59:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 01:59:29,405 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-27 01:59:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:29,405 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 01:59:29,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:59:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 01:59:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:59:29,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:29,409 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:29,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:59:29,409 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1870604424, now seen corresponding path program 6 times [2020-10-27 01:59:29,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:29,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120303934] [2020-10-27 01:59:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:29,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:30,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:30,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:59:30,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:30,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-27 01:59:30,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:30,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:59:30,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:30,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:59:30,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:30,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:30,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:30,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:30,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:30,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:59:30,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120303934] [2020-10-27 01:59:30,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:30,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:59:30,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796651829] [2020-10-27 01:59:30,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:59:30,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:30,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:59:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:59:30,703 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-10-27 01:59:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:30,853 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 01:59:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:59:30,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:59:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:30,855 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:59:30,855 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:59:30,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:59:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:59:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-27 01:59:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:59:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 01:59:30,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-27 01:59:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:30,862 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 01:59:30,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:59:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 01:59:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:59:30,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:30,863 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:30,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:59:30,863 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:30,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:30,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1499794730, now seen corresponding path program 7 times [2020-10-27 01:59:30,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:30,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044771518] [2020-10-27 01:59:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:30,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:30,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:32,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:32,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:59:32,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:32,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1267 [2020-10-27 01:59:32,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:59:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:59:32,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:32,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:32,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:32,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:32,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:32,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:59:32,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:32,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:32,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044771518] [2020-10-27 01:59:32,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:32,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:59:32,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818930829] [2020-10-27 01:59:32,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:59:32,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:32,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:59:32,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:59:32,328 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-27 01:59:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:32,510 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-27 01:59:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:59:32,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 01:59:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:32,511 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:59:32,512 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:59:32,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:59:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:59:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-27 01:59:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:59:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 01:59:32,518 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-27 01:59:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:32,519 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 01:59:32,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:59:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 01:59:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:59:32,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:32,520 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:32,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:59:32,520 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1633964364, now seen corresponding path program 8 times [2020-10-27 01:59:32,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:32,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534200245] [2020-10-27 01:59:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:32,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:32,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:34,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:34,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:59:34,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:34,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1486 [2020-10-27 01:59:34,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:59:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:59:34,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:34,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:34,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:34,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:34,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:34,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:59:34,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:34,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:34,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534200245] [2020-10-27 01:59:34,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:34,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:59:34,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739054174] [2020-10-27 01:59:34,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:59:34,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:34,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:59:34,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:59:34,241 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-27 01:59:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:34,485 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 01:59:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:59:34,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:59:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:34,486 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:59:34,486 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:59:34,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:59:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:59:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 01:59:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:59:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 01:59:34,493 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-27 01:59:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:34,493 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 01:59:34,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:59:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 01:59:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:59:34,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:34,495 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:34,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:59:34,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:34,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1721963758, now seen corresponding path program 9 times [2020-10-27 01:59:34,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:34,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422619817] [2020-10-27 01:59:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:34,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:36,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:36,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:59:36,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:36,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-10-27 01:59:36,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:36,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:59:36,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:36,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:59:36,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:36,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:36,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:36,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:36,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:36,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:36,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:36,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:36,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422619817] [2020-10-27 01:59:36,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:36,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:59:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186289693] [2020-10-27 01:59:36,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:59:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:36,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:59:36,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:59:36,312 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-27 01:59:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:36,555 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-27 01:59:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:59:36,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 01:59:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:36,557 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:59:36,557 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:59:36,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:59:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:59:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-27 01:59:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:59:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 01:59:36,563 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-27 01:59:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:36,564 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 01:59:36,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:59:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 01:59:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:59:36,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:36,565 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:36,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:59:36,565 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash 390035472, now seen corresponding path program 10 times [2020-10-27 01:59:36,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:36,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239575396] [2020-10-27 01:59:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:36,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:36,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:59:36,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:36,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 01:59:36,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:36,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:59:36,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 01:59:36,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:59:36,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:36,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:36,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:36,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:36,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:36,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:36,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:36,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:36,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:36,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:36,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:36,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 01:59:36,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239575396] [2020-10-27 01:59:36,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:59:36,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:59:36,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923706379] [2020-10-27 01:59:36,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:59:36,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:36,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:59:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:59:36,789 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 5 states. [2020-10-27 01:59:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:36,891 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-27 01:59:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:59:36,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-27 01:59:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:36,892 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:59:36,892 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:59:36,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:59:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:59:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:59:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:59:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:59:36,894 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-10-27 01:59:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:36,895 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:59:36,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:59:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:59:36,895 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:59:36,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:59:36,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:59:37,036 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 01:59:37,037 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 01:59:37,037 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 01:59:37,037 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 01:59:37,037 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:59:37,037 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|)) [2020-10-27 01:59:37,038 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:59:37,038 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:59:37,038 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:59:37,038 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:59:37,038 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:59:37,038 INFO L277 CegarLoopResult]: At program point L29-2(lines 29 35) the Hoare annotation is: true [2020-10-27 01:59:37,038 INFO L277 CegarLoopResult]: At program point L29-3(lines 29 35) the Hoare annotation is: true [2020-10-27 01:59:37,038 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 39) no Hoare annotation was computed. [2020-10-27 01:59:37,039 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 39) no Hoare annotation was computed. [2020-10-27 01:59:37,039 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 12 39) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-10-27 01:59:37,039 INFO L274 CegarLoopResult]: For program point L20-2(lines 20 22) no Hoare annotation was computed. [2020-10-27 01:59:37,039 INFO L277 CegarLoopResult]: At program point L20-3(lines 20 22) the Hoare annotation is: true [2020-10-27 01:59:37,039 INFO L274 CegarLoopResult]: For program point L20-4(lines 20 22) no Hoare annotation was computed. [2020-10-27 01:59:37,039 INFO L274 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-10-27 01:59:37,039 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-27 01:59:37,040 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-27 01:59:37,040 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-27 01:59:37,040 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-27 01:59:37,040 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-27 01:59:37,040 INFO L274 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-27 01:59:37,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:59:37 BoogieIcfgContainer [2020-10-27 01:59:37,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:59:37,053 INFO L168 Benchmark]: Toolchain (without parser) took 14198.54 ms. Allocated memory was 151.0 MB in the beginning and 323.0 MB in the end (delta: 172.0 MB). Free memory was 127.7 MB in the beginning and 210.4 MB in the end (delta: -82.7 MB). Peak memory consumption was 89.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:59:37,053 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 125.8 MB. Free memory is still 105.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:59:37,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.82 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:59:37,055 INFO L168 Benchmark]: Boogie Preprocessor took 39.75 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:59:37,055 INFO L168 Benchmark]: RCFGBuilder took 536.86 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 134.0 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:59:37,056 INFO L168 Benchmark]: TraceAbstraction took 13366.42 ms. Allocated memory was 151.0 MB in the beginning and 323.0 MB in the end (delta: 172.0 MB). Free memory was 133.5 MB in the beginning and 210.4 MB in the end (delta: -76.8 MB). Peak memory consumption was 94.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:59:37,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 125.8 MB. Free memory is still 105.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.82 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.75 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 536.86 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 134.0 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13366.42 ms. Allocated memory was 151.0 MB in the beginning and 323.0 MB in the end (delta: 172.0 MB). Free memory was 133.5 MB in the beginning and 210.4 MB in the end (delta: -76.8 MB). Peak memory consumption was 94.6 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: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.1s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 105 SDslu, 385 SDs, 0 SdLazy, 1164 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 32 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 40 PreInvPairs, 52 NumberOfFragments, 49 HoareAnnotationTreeSize, 40 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 62 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 253 ConstructedInterpolants, 0 QuantifiedInterpolants, 30041 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 100/385 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...