/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:02:33,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:02:33,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:02:33,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 22:02:33,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 22:02:33,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 22:02:33,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 22:02:33,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 22:02:33,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 22:02:33,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 22:02:33,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 22:02:33,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 22:02:33,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:02:33,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:02:33,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:02:33,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:02:33,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:02:33,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:02:33,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:02:33,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:02:33,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:02:33,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:02:33,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:02:33,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:02:33,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 22:02:33,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 22:02:33,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 22:02:33,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 22:02:33,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 22:02:33,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 22:02:33,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 22:02:33,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 22:02:33,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 22:02:33,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 22:02:33,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 22:02:33,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 22:02:33,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 22:02:33,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 22:02:33,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:02:33,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:02:33,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:02:33,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:02:33,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:02:33,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:02:33,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:02:33,241 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:02:33,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:02:33,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:02:33,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:02:33,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:02:33,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:02:33,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:02:33,243 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:02:33,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:02:33,243 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:02:33,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:02:33,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:02:33,244 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:02:33,244 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:02:33,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:02:33,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:02:33,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:02:33,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:02:33,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:02:33,245 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:02:33,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:02:33,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:02:33,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:02:33,690 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:02:33,690 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:02:33,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-10-23 22:02:33,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2011590b7/9d093f840d404a688b2b9cf2bfcb8d99/FLAGeeb81a6ef [2020-10-23 22:02:34,461 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:02:34,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-10-23 22:02:34,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2011590b7/9d093f840d404a688b2b9cf2bfcb8d99/FLAGeeb81a6ef [2020-10-23 22:02:34,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2011590b7/9d093f840d404a688b2b9cf2bfcb8d99 [2020-10-23 22:02:34,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:02:34,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:02:34,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:34,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:02:34,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:02:34,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:34" (1/1) ... [2020-10-23 22:02:34,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c5be67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:34, skipping insertion in model container [2020-10-23 22:02:34,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:34" (1/1) ... [2020-10-23 22:02:34,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:02:34,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:02:35,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:35,073 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:02:35,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:35,107 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:02:35,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35 WrapperNode [2020-10-23 22:02:35,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:35,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:02:35,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:02:35,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:02:35,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (1/1) ... [2020-10-23 22:02:35,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (1/1) ... [2020-10-23 22:02:35,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (1/1) ... [2020-10-23 22:02:35,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (1/1) ... [2020-10-23 22:02:35,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (1/1) ... [2020-10-23 22:02:35,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (1/1) ... [2020-10-23 22:02:35,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (1/1) ... [2020-10-23 22:02:35,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:02:35,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:02:35,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:02:35,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:02:35,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 22:02:35,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:02:35,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:02:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:02:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:02:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:02:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:02:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:02:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:02:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:02:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:02:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:02:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:02:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:02:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:02:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:02:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:02:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:02:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:02:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:02:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:02:35,778 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:02:35,779 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:02:35,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:35 BoogieIcfgContainer [2020-10-23 22:02:35,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:02:35,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:02:35,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:02:35,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:02:35,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:02:34" (1/3) ... [2020-10-23 22:02:35,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a19a842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:35, skipping insertion in model container [2020-10-23 22:02:35,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:35" (2/3) ... [2020-10-23 22:02:35,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a19a842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:35, skipping insertion in model container [2020-10-23 22:02:35,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:35" (3/3) ... [2020-10-23 22:02:35,819 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-10-23 22:02:35,831 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:02:35,837 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:02:35,852 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:02:35,889 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:02:35,890 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:02:35,890 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:02:35,890 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:02:35,890 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:02:35,890 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:02:35,890 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:02:35,891 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:02:35,916 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-23 22:02:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 22:02:35,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:35,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:35,933 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1036611502, now seen corresponding path program 1 times [2020-10-23 22:02:35,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:35,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937132914] [2020-10-23 22:02:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:36,048 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:36,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:36,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937132914] [2020-10-23 22:02:36,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:36,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 22:02:36,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246654560] [2020-10-23 22:02:36,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 22:02:36,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:36,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 22:02:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:02:36,422 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-10-23 22:02:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:36,536 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-23 22:02:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 22:02:36,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-23 22:02:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:36,549 INFO L225 Difference]: With dead ends: 65 [2020-10-23 22:02:36,549 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 22:02:36,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:02:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 22:02:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 22:02:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 22:02:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-23 22:02:36,610 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2020-10-23 22:02:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:36,611 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-23 22:02:36,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 22:02:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-23 22:02:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 22:02:36,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:36,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:36,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:02:36,613 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:36,614 INFO L82 PathProgramCache]: Analyzing trace with hash 149107821, now seen corresponding path program 1 times [2020-10-23 22:02:36,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:36,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415921997] [2020-10-23 22:02:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:36,618 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:37,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:37,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415921997] [2020-10-23 22:02:37,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:37,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 22:02:37,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769039084] [2020-10-23 22:02:37,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 22:02:37,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:37,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 22:02:37,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 22:02:37,117 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 11 states. [2020-10-23 22:02:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:37,821 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2020-10-23 22:02:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 22:02:37,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-23 22:02:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:37,825 INFO L225 Difference]: With dead ends: 101 [2020-10-23 22:02:37,825 INFO L226 Difference]: Without dead ends: 81 [2020-10-23 22:02:37,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-23 22:02:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-23 22:02:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2020-10-23 22:02:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 22:02:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-23 22:02:37,846 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 30 [2020-10-23 22:02:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:37,846 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-23 22:02:37,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 22:02:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-23 22:02:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 22:02:37,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:37,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:37,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:02:37,849 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:37,849 INFO L82 PathProgramCache]: Analyzing trace with hash 824943879, now seen corresponding path program 1 times [2020-10-23 22:02:37,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:37,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987043423] [2020-10-23 22:02:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:40,259 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-10-23 22:02:40,275 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:40,277 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:41,011 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-23 22:02:41,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:41,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987043423] [2020-10-23 22:02:41,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:41,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 22:02:41,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642997308] [2020-10-23 22:02:41,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 22:02:41,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:41,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 22:02:41,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-23 22:02:41,327 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 18 states. [2020-10-23 22:02:42,046 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-23 22:02:42,200 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-23 22:02:42,387 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-23 22:02:42,580 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-23 22:02:42,784 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-23 22:02:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:45,350 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-23 22:02:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 22:02:45,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-23 22:02:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:45,352 INFO L225 Difference]: With dead ends: 68 [2020-10-23 22:02:45,352 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 22:02:45,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-23 22:02:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 22:02:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-10-23 22:02:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 22:02:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-23 22:02:45,386 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2020-10-23 22:02:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:45,387 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-23 22:02:45,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 22:02:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-23 22:02:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 22:02:45,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:45,389 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:45,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:02:45,389 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 674642081, now seen corresponding path program 2 times [2020-10-23 22:02:45,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:45,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305662554] [2020-10-23 22:02:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:46,217 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-23 22:02:48,307 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:02:50,398 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:02:55,323 WARN L193 SmtUtils]: Spent 4.89 s on a formula simplification. DAG size of input: 3247 DAG size of output: 146 [2020-10-23 22:02:56,133 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-23 22:02:56,991 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:02:56,994 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:56,997 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:57,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:57,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305662554] [2020-10-23 22:02:57,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:57,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 22:02:57,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030135134] [2020-10-23 22:02:57,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 22:02:57,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:57,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 22:02:57,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 22:02:57,360 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 8 states. [2020-10-23 22:02:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:57,993 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-23 22:02:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:02:57,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-23 22:02:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:57,996 INFO L225 Difference]: With dead ends: 72 [2020-10-23 22:02:57,996 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 22:02:57,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-23 22:02:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 22:02:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-23 22:02:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 22:02:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-23 22:02:58,028 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-23 22:02:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:58,029 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-23 22:02:58,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 22:02:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-23 22:02:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 22:02:58,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:58,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:58,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:02:58,033 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:58,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1394265352, now seen corresponding path program 1 times [2020-10-23 22:02:58,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:58,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20159441] [2020-10-23 22:02:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:00,128 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 24 [2020-10-23 22:03:03,423 WARN L193 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 2936 DAG size of output: 96 [2020-10-23 22:03:05,532 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:03:07,628 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:03:25,715 WARN L193 SmtUtils]: Spent 18.04 s on a formula simplification. DAG size of input: 8993 DAG size of output: 140 [2020-10-23 22:03:26,713 WARN L193 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-23 22:03:27,590 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:03:27,593 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:27,595 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:27,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:27,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20159441] [2020-10-23 22:03:27,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:27,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:03:27,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301790527] [2020-10-23 22:03:27,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:03:27,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:27,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:03:27,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:03:27,748 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-10-23 22:03:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:28,063 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-23 22:03:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:03:28,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-23 22:03:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:28,067 INFO L225 Difference]: With dead ends: 71 [2020-10-23 22:03:28,068 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 22:03:28,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:03:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 22:03:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-23 22:03:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 22:03:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-23 22:03:28,100 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2020-10-23 22:03:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:28,102 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-23 22:03:28,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:03:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-23 22:03:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 22:03:28,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:28,111 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:28,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:03:28,112 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash -200289605, now seen corresponding path program 1 times [2020-10-23 22:03:28,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:28,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985482571] [2020-10-23 22:03:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:32,296 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-23 22:03:36,465 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-23 22:03:38,648 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 920 DAG size of output: 108 [2020-10-23 22:03:40,725 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:03:42,797 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:03:49,150 WARN L193 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 3247 DAG size of output: 123 [2020-10-23 22:03:51,600 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-10-23 22:03:53,704 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-23 22:03:57,868 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-23 22:03:59,326 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2020-10-23 22:03:59,333 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:59,334 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:03,779 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-23 22:04:03,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:04:06,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985482571] [2020-10-23 22:04:06,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:06,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 22:04:06,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692012045] [2020-10-23 22:04:06,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 22:04:06,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:06,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 22:04:06,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2020-10-23 22:04:06,097 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-10-23 22:04:06,671 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-23 22:04:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:04:07,056 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-23 22:04:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:04:07,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-23 22:04:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:04:07,058 INFO L225 Difference]: With dead ends: 70 [2020-10-23 22:04:07,058 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 22:04:07,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=53, Invalid=156, Unknown=1, NotChecked=0, Total=210 [2020-10-23 22:04:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 22:04:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-23 22:04:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 22:04:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-23 22:04:07,095 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-23 22:04:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:04:07,096 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-23 22:04:07,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 22:04:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-23 22:04:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 22:04:07,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:07,104 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:04:07,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 22:04:07,105 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash -519925598, now seen corresponding path program 1 times [2020-10-23 22:04:07,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:07,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591428533] [2020-10-23 22:04:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:11,355 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-23 22:04:15,581 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-23 22:08:13,650 WARN L193 SmtUtils]: Spent 3.89 m on a formula simplification. DAG size of input: 699538 DAG size of output: 114 [2020-10-23 22:08:15,742 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:08:17,833 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:08:20,074 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-10-23 22:08:21,029 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:08:25,264 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-23 22:08:27,341 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2020-10-23 22:08:27,342 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:08:27,344 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:08:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:27,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:08:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:08:27,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591428533] [2020-10-23 22:08:27,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:08:27,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:08:27,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827130036] [2020-10-23 22:08:27,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:08:27,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:08:27,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:08:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:08:27,493 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-10-23 22:08:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:08:27,799 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-23 22:08:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:08:27,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-23 22:08:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:08:27,801 INFO L225 Difference]: With dead ends: 69 [2020-10-23 22:08:27,801 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 22:08:27,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:08:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 22:08:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-23 22:08:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 22:08:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-23 22:08:27,820 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2020-10-23 22:08:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:08:27,821 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-23 22:08:27,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:08:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-23 22:08:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 22:08:27,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:08:27,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:08:27,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 22:08:27,823 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:08:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:08:27,823 INFO L82 PathProgramCache]: Analyzing trace with hash -713857982, now seen corresponding path program 1 times [2020-10-23 22:08:27,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:08:27,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768890153] [2020-10-23 22:08:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:08:36,209 WARN L193 SmtUtils]: Spent 8.38 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-23 22:08:38,315 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 30 [2020-10-23 22:08:44,040 WARN L193 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 112 DAG size of output: 112 [2020-10-23 22:08:46,158 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:08:48,262 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:09:18,820 WARN L193 SmtUtils]: Spent 30.51 s on a formula simplification. DAG size of input: 10833 DAG size of output: 144 [2020-10-23 22:09:19,337 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-23 22:09:21,459 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 30 [2020-10-23 22:09:30,142 WARN L193 SmtUtils]: Spent 8.66 s on a formula simplification. DAG size of input: 2951 DAG size of output: 111 [2020-10-23 22:09:31,150 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:09:31,151 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:09:31,154 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:09:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:32,296 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-23 22:09:32,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:09:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:09:32,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768890153] [2020-10-23 22:09:32,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:09:32,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 22:09:32,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682948489] [2020-10-23 22:09:32,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 22:09:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:09:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 22:09:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-23 22:09:32,703 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-10-23 22:09:33,247 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-23 22:09:33,401 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-23 22:09:33,558 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-23 22:09:33,711 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-23 22:09:33,943 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-23 22:09:34,197 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-23 22:09:34,458 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-23 22:09:34,751 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-23 22:09:35,000 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-23 22:09:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:09:35,561 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-10-23 22:09:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 22:09:35,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-23 22:09:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:09:35,563 INFO L225 Difference]: With dead ends: 80 [2020-10-23 22:09:35,563 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 22:09:35,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 22:09:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 22:09:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-23 22:09:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 22:09:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-23 22:09:35,586 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2020-10-23 22:09:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:09:35,586 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-23 22:09:35,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 22:09:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-23 22:09:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 22:09:35,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:09:35,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:09:35,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 22:09:35,587 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:09:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:09:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash -674897316, now seen corresponding path program 2 times [2020-10-23 22:09:35,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:09:35,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834817659] [2020-10-23 22:09:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:09:37,799 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-23 22:09:39,358 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 112 DAG size of output: 112 [2020-10-23 22:09:40,973 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 902 DAG size of output: 90 [2020-10-23 22:09:57,736 WARN L193 SmtUtils]: Spent 16.76 s on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-23 22:09:59,900 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 31