/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:52:55,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:52:55,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:52:55,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:52:55,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:52:55,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:52:55,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:52:55,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:52:55,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:52:55,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:52:55,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:52:55,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:52:55,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:52:55,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:52:55,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:52:55,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:52:55,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:52:55,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:52:55,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:52:55,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:52:55,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:52:55,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:52:55,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:52:55,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:52:55,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:52:55,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:52:55,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:52:55,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:52:55,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:52:55,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:52:55,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:52:55,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:52:55,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:52:55,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:52:55,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:52:55,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:52:55,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:52:55,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:52:55,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:52:55,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:52:55,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:52:55,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:52:55,290 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:52:55,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:52:55,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:52:55,295 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:52:55,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:52:55,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:52:55,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:52:55,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:52:55,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:52:55,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:52:55,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:52:55,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:52:55,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:52:55,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:52:55,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:52:55,299 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:52:55,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:52:55,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:52:55,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:52:55,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:52:55,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:52:55,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:52:55,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:52:55,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:52:55,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:52:55,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:52:55,723 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:52:55,723 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:52:55,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-11-07 00:52:55,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44fe76cb5/485fcb7bbded4fca9b2f5425c28d13a8/FLAGddab1a3fb [2020-11-07 00:52:56,476 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:52:56,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-11-07 00:52:56,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44fe76cb5/485fcb7bbded4fca9b2f5425c28d13a8/FLAGddab1a3fb [2020-11-07 00:52:56,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44fe76cb5/485fcb7bbded4fca9b2f5425c28d13a8 [2020-11-07 00:52:56,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:52:56,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:52:56,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:52:56,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:52:56,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:52:56,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a0a207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56, skipping insertion in model container [2020-11-07 00:52:56,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:52:56,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:52:56,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:52:56,833 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:52:56,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:52:56,892 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:52:56,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56 WrapperNode [2020-11-07 00:52:56,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:52:56,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:52:56,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:52:56,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:52:56,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (1/1) ... [2020-11-07 00:52:56,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:52:56,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:52:56,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:52:56,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:52:56,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (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 [2020-11-07 00:52:57,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:52:57,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:52:57,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:52:57,045 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-11-07 00:52:57,045 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:52:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:52:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:52:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:52:57,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:52:57,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:52:57,046 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-07 00:52:57,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:52:57,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:52:57,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:52:57,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:52:57,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:52:57,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:52:57,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:52:57,499 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:52:57,500 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 00:52:57,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:52:57 BoogieIcfgContainer [2020-11-07 00:52:57,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:52:57,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:52:57,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:52:57,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:52:57,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:52:56" (1/3) ... [2020-11-07 00:52:57,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320743d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:52:57, skipping insertion in model container [2020-11-07 00:52:57,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56" (2/3) ... [2020-11-07 00:52:57,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320743d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:52:57, skipping insertion in model container [2020-11-07 00:52:57,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:52:57" (3/3) ... [2020-11-07 00:52:57,510 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-11-07 00:52:57,529 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:52:57,532 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:52:57,544 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:52:57,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:52:57,568 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:52:57,568 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:52:57,568 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:52:57,568 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:52:57,569 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:52:57,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:52:57,569 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:52:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-11-07 00:52:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:52:57,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:57,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:57,603 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1281420821, now seen corresponding path program 1 times [2020-11-07 00:52:57,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:57,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883533824] [2020-11-07 00:52:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:57,695 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:57,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:57,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 00:52:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:52:57,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883533824] [2020-11-07 00:52:57,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:57,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 00:52:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182455082] [2020-11-07 00:52:57,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 00:52:57,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:58,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 00:52:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:52:58,013 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-11-07 00:52:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:58,260 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-11-07 00:52:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 00:52:58,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-11-07 00:52:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:58,273 INFO L225 Difference]: With dead ends: 112 [2020-11-07 00:52:58,273 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 00:52:58,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:52:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 00:52:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-07 00:52:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-07 00:52:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-11-07 00:52:58,377 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 43 [2020-11-07 00:52:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:58,378 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-11-07 00:52:58,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 00:52:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-11-07 00:52:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 00:52:58,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:58,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:58,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:52:58,383 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:58,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1979567000, now seen corresponding path program 1 times [2020-11-07 00:52:58,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:58,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381609868] [2020-11-07 00:52:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:58,393 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:58,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:58,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:52:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:52:58,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381609868] [2020-11-07 00:52:58,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:58,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:52:58,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773738651] [2020-11-07 00:52:58,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:52:58,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:52:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:52:58,544 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 4 states. [2020-11-07 00:52:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:58,753 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-11-07 00:52:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:52:58,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-11-07 00:52:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:58,756 INFO L225 Difference]: With dead ends: 99 [2020-11-07 00:52:58,756 INFO L226 Difference]: Without dead ends: 68 [2020-11-07 00:52:58,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:52:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-07 00:52:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-11-07 00:52:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-07 00:52:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-11-07 00:52:58,771 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 45 [2020-11-07 00:52:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:58,772 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-11-07 00:52:58,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:52:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-11-07 00:52:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 00:52:58,774 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:58,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:58,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:52:58,774 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2107402754, now seen corresponding path program 1 times [2020-11-07 00:52:58,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:58,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350958358] [2020-11-07 00:52:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:58,876 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:52:58,878 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:59,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:59,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-07 00:52:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:52:59,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350958358] [2020-11-07 00:52:59,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:59,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:52:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422215554] [2020-11-07 00:52:59,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:52:59,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:59,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:52:59,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:52:59,093 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 6 states. [2020-11-07 00:52:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:59,333 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-11-07 00:52:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:52:59,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-11-07 00:52:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:59,335 INFO L225 Difference]: With dead ends: 109 [2020-11-07 00:52:59,335 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 00:52:59,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:52:59,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 00:52:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-11-07 00:52:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-07 00:52:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-11-07 00:52:59,359 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 55 [2020-11-07 00:52:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:59,359 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-11-07 00:52:59,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:52:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-11-07 00:52:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-07 00:52:59,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:59,367 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:59,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:52:59,367 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:59,368 INFO L82 PathProgramCache]: Analyzing trace with hash 592176924, now seen corresponding path program 2 times [2020-11-07 00:52:59,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:59,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011516765] [2020-11-07 00:52:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:59,481 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:52:59,483 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:59,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:59,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-11-07 00:52:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:52:59,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011516765] [2020-11-07 00:52:59,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:59,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:52:59,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270521877] [2020-11-07 00:52:59,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:52:59,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:59,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:52:59,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:52:59,618 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 8 states. [2020-11-07 00:52:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:59,859 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2020-11-07 00:52:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:52:59,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-11-07 00:52:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:59,861 INFO L225 Difference]: With dead ends: 119 [2020-11-07 00:52:59,861 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:52:59,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:52:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:52:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-11-07 00:52:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-07 00:52:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-11-07 00:52:59,875 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 65 [2020-11-07 00:52:59,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:59,875 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-11-07 00:52:59,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:52:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-11-07 00:52:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 00:52:59,877 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:59,877 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:59,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:52:59,878 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2067969098, now seen corresponding path program 3 times [2020-11-07 00:52:59,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:59,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239955172] [2020-11-07 00:52:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:59,990 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:52:59,992 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:00,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:00,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-11-07 00:53:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:00,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239955172] [2020-11-07 00:53:00,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:00,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:53:00,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784197993] [2020-11-07 00:53:00,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:53:00,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:53:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:53:00,164 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 10 states. [2020-11-07 00:53:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:00,456 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-11-07 00:53:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:53:00,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-11-07 00:53:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:00,458 INFO L225 Difference]: With dead ends: 129 [2020-11-07 00:53:00,458 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:53:00,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:53:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:53:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2020-11-07 00:53:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-07 00:53:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-11-07 00:53:00,470 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 75 [2020-11-07 00:53:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:00,471 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-11-07 00:53:00,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:53:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-11-07 00:53:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 00:53:00,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:00,473 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:00,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:53:00,473 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1951741904, now seen corresponding path program 4 times [2020-11-07 00:53:00,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:00,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718941098] [2020-11-07 00:53:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:00,609 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:00,612 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:00,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:00,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-11-07 00:53:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:00,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718941098] [2020-11-07 00:53:00,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:00,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:53:00,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537826418] [2020-11-07 00:53:00,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:53:00,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:00,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:53:00,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:53:00,812 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 12 states. [2020-11-07 00:53:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:01,167 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2020-11-07 00:53:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 00:53:01,168 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-11-07 00:53:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:01,170 INFO L225 Difference]: With dead ends: 139 [2020-11-07 00:53:01,170 INFO L226 Difference]: Without dead ends: 108 [2020-11-07 00:53:01,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:53:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-07 00:53:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2020-11-07 00:53:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-07 00:53:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-11-07 00:53:01,184 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 85 [2020-11-07 00:53:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:01,184 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-11-07 00:53:01,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:53:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-11-07 00:53:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 00:53:01,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:01,186 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:01,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:53:01,187 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash 120605546, now seen corresponding path program 5 times [2020-11-07 00:53:01,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:01,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71493745] [2020-11-07 00:53:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:01,287 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:01,289 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:01,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:01,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-11-07 00:53:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:01,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71493745] [2020-11-07 00:53:01,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:01,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:53:01,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187963483] [2020-11-07 00:53:01,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:53:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:53:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:53:01,590 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 14 states. [2020-11-07 00:53:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:02,000 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2020-11-07 00:53:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:53:02,000 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2020-11-07 00:53:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:02,002 INFO L225 Difference]: With dead ends: 149 [2020-11-07 00:53:02,003 INFO L226 Difference]: Without dead ends: 118 [2020-11-07 00:53:02,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:53:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-07 00:53:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2020-11-07 00:53:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-07 00:53:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-11-07 00:53:02,034 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 95 [2020-11-07 00:53:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:02,035 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-11-07 00:53:02,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:53:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-11-07 00:53:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 00:53:02,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:02,036 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:02,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:53:02,037 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:02,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1893521788, now seen corresponding path program 6 times [2020-11-07 00:53:02,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:02,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513040012] [2020-11-07 00:53:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:02,156 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:02,158 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:02,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:02,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-11-07 00:53:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:02,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513040012] [2020-11-07 00:53:02,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:02,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:53:02,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896789435] [2020-11-07 00:53:02,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:53:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:53:02,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:53:02,411 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 16 states. [2020-11-07 00:53:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:02,893 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-11-07 00:53:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 00:53:02,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-11-07 00:53:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:02,895 INFO L225 Difference]: With dead ends: 159 [2020-11-07 00:53:02,896 INFO L226 Difference]: Without dead ends: 128 [2020-11-07 00:53:02,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:53:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-07 00:53:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-11-07 00:53:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-07 00:53:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-11-07 00:53:02,929 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 105 [2020-11-07 00:53:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:02,929 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-11-07 00:53:02,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:53:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-11-07 00:53:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 00:53:02,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:02,934 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:02,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:53:02,936 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash 347760926, now seen corresponding path program 7 times [2020-11-07 00:53:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:02,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120829771] [2020-11-07 00:53:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:03,065 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:03,066 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:03,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:03,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-11-07 00:53:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:03,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120829771] [2020-11-07 00:53:03,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:03,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:53:03,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507903978] [2020-11-07 00:53:03,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:53:03,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:03,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:53:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:53:03,384 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 18 states. [2020-11-07 00:53:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:03,942 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2020-11-07 00:53:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:53:03,943 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 115 [2020-11-07 00:53:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:03,945 INFO L225 Difference]: With dead ends: 169 [2020-11-07 00:53:03,945 INFO L226 Difference]: Without dead ends: 138 [2020-11-07 00:53:03,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:53:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-07 00:53:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-11-07 00:53:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-11-07 00:53:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-11-07 00:53:03,959 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 115 [2020-11-07 00:53:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:03,960 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-11-07 00:53:03,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:53:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-11-07 00:53:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 00:53:03,962 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:03,962 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:03,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:53:03,963 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:03,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1362801464, now seen corresponding path program 8 times [2020-11-07 00:53:03,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:03,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240303454] [2020-11-07 00:53:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:04,076 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:04,079 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:04,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:04,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-07 00:53:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:04,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240303454] [2020-11-07 00:53:04,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:04,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 00:53:04,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475694507] [2020-11-07 00:53:04,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 00:53:04,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 00:53:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:53:04,457 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 20 states. [2020-11-07 00:53:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:05,101 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2020-11-07 00:53:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 00:53:05,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 125 [2020-11-07 00:53:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:05,103 INFO L225 Difference]: With dead ends: 179 [2020-11-07 00:53:05,103 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 00:53:05,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 00:53:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 00:53:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2020-11-07 00:53:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-07 00:53:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2020-11-07 00:53:05,121 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 125 [2020-11-07 00:53:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:05,123 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2020-11-07 00:53:05,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 00:53:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2020-11-07 00:53:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 00:53:05,131 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:05,131 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:05,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:53:05,131 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:05,133 INFO L82 PathProgramCache]: Analyzing trace with hash 681616594, now seen corresponding path program 9 times [2020-11-07 00:53:05,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:05,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256504524] [2020-11-07 00:53:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:05,238 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:05,240 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:05,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:05,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-11-07 00:53:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:05,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256504524] [2020-11-07 00:53:05,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:05,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:53:05,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74591148] [2020-11-07 00:53:05,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:53:05,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:53:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:53:05,680 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 22 states. [2020-11-07 00:53:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:06,395 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2020-11-07 00:53:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 00:53:06,396 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 135 [2020-11-07 00:53:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:06,398 INFO L225 Difference]: With dead ends: 189 [2020-11-07 00:53:06,398 INFO L226 Difference]: Without dead ends: 158 [2020-11-07 00:53:06,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 00:53:06,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-07 00:53:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-11-07 00:53:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-07 00:53:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-11-07 00:53:06,415 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 135 [2020-11-07 00:53:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:06,416 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-11-07 00:53:06,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:53:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-11-07 00:53:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:53:06,419 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:06,419 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:06,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:53:06,419 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1549738516, now seen corresponding path program 10 times [2020-11-07 00:53:06,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:06,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409687115] [2020-11-07 00:53:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:06,525 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:06,527 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:06,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:06,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-11-07 00:53:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409687115] [2020-11-07 00:53:06,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:06,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:53:06,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763146954] [2020-11-07 00:53:06,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:53:06,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:06,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:53:06,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:53:06,975 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 24 states. [2020-11-07 00:53:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:07,730 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2020-11-07 00:53:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 00:53:07,731 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-11-07 00:53:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:07,732 INFO L225 Difference]: With dead ends: 199 [2020-11-07 00:53:07,733 INFO L226 Difference]: Without dead ends: 168 [2020-11-07 00:53:07,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 00:53:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-07 00:53:07,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2020-11-07 00:53:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 00:53:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2020-11-07 00:53:07,746 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 145 [2020-11-07 00:53:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:07,746 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2020-11-07 00:53:07,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:53:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2020-11-07 00:53:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 00:53:07,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:07,748 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:07,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:53:07,749 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1772617350, now seen corresponding path program 11 times [2020-11-07 00:53:07,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:07,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52646118] [2020-11-07 00:53:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:07,850 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:07,852 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:08,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:08,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-11-07 00:53:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:08,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52646118] [2020-11-07 00:53:08,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:08,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 00:53:08,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505903422] [2020-11-07 00:53:08,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 00:53:08,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:08,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 00:53:08,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:53:08,306 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 26 states. [2020-11-07 00:53:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:09,073 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2020-11-07 00:53:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 00:53:09,074 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 155 [2020-11-07 00:53:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:09,076 INFO L225 Difference]: With dead ends: 209 [2020-11-07 00:53:09,076 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 00:53:09,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 00:53:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 00:53:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2020-11-07 00:53:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-11-07 00:53:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2020-11-07 00:53:09,090 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 155 [2020-11-07 00:53:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:09,091 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2020-11-07 00:53:09,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 00:53:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2020-11-07 00:53:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:53:09,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:09,093 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:09,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:53:09,093 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:09,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1160075616, now seen corresponding path program 12 times [2020-11-07 00:53:09,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:09,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739184676] [2020-11-07 00:53:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:09,210 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:09,212 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:09,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:09,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-11-07 00:53:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:09,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739184676] [2020-11-07 00:53:09,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:09,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 00:53:09,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617473944] [2020-11-07 00:53:09,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 00:53:09,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 00:53:09,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:53:09,748 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 28 states. [2020-11-07 00:53:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:10,709 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2020-11-07 00:53:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 00:53:10,712 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 165 [2020-11-07 00:53:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:10,714 INFO L225 Difference]: With dead ends: 219 [2020-11-07 00:53:10,714 INFO L226 Difference]: Without dead ends: 188 [2020-11-07 00:53:10,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 00:53:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-11-07 00:53:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2020-11-07 00:53:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-07 00:53:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-11-07 00:53:10,728 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 165 [2020-11-07 00:53:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:10,729 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-11-07 00:53:10,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 00:53:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-11-07 00:53:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 00:53:10,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:10,731 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:10,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:53:10,731 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash -367692230, now seen corresponding path program 13 times [2020-11-07 00:53:10,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:10,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410611994] [2020-11-07 00:53:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:10,846 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:10,848 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:11,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:11,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-11-07 00:53:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:11,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410611994] [2020-11-07 00:53:11,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:11,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-11-07 00:53:11,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130239485] [2020-11-07 00:53:11,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 00:53:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 00:53:11,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-11-07 00:53:11,425 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 30 states. [2020-11-07 00:53:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:12,509 INFO L93 Difference]: Finished difference Result 229 states and 231 transitions. [2020-11-07 00:53:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 00:53:12,510 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 175 [2020-11-07 00:53:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:12,512 INFO L225 Difference]: With dead ends: 229 [2020-11-07 00:53:12,512 INFO L226 Difference]: Without dead ends: 198 [2020-11-07 00:53:12,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 00:53:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-07 00:53:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2020-11-07 00:53:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-11-07 00:53:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-11-07 00:53:12,524 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 175 [2020-11-07 00:53:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:12,525 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-11-07 00:53:12,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 00:53:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-11-07 00:53:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 00:53:12,527 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:12,527 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:12,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 00:53:12,527 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:12,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1458376020, now seen corresponding path program 14 times [2020-11-07 00:53:12,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:12,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141941859] [2020-11-07 00:53:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:12,632 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:12,633 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:13,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-11-07 00:53:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:13,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141941859] [2020-11-07 00:53:13,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:13,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 00:53:13,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002994658] [2020-11-07 00:53:13,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 00:53:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 00:53:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:53:13,280 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 32 states. [2020-11-07 00:53:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:14,308 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2020-11-07 00:53:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 00:53:14,309 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 185 [2020-11-07 00:53:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:14,311 INFO L225 Difference]: With dead ends: 239 [2020-11-07 00:53:14,311 INFO L226 Difference]: Without dead ends: 208 [2020-11-07 00:53:14,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 00:53:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-07 00:53:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 200. [2020-11-07 00:53:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-07 00:53:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2020-11-07 00:53:14,324 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 185 [2020-11-07 00:53:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:14,324 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2020-11-07 00:53:14,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 00:53:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2020-11-07 00:53:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 00:53:14,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:14,327 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:14,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 00:53:14,327 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash -408024082, now seen corresponding path program 15 times [2020-11-07 00:53:14,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:14,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837805460] [2020-11-07 00:53:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:14,421 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:14,422 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:15,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:15,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-11-07 00:53:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:15,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837805460] [2020-11-07 00:53:15,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:15,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-11-07 00:53:15,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206609884] [2020-11-07 00:53:15,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 00:53:15,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 00:53:15,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:53:15,119 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 34 states. [2020-11-07 00:53:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:16,444 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2020-11-07 00:53:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 00:53:16,444 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 195 [2020-11-07 00:53:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:16,447 INFO L225 Difference]: With dead ends: 249 [2020-11-07 00:53:16,447 INFO L226 Difference]: Without dead ends: 218 [2020-11-07 00:53:16,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 00:53:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-07 00:53:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2020-11-07 00:53:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-07 00:53:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2020-11-07 00:53:16,460 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 195 [2020-11-07 00:53:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:16,460 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2020-11-07 00:53:16,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 00:53:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2020-11-07 00:53:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 00:53:16,463 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:16,463 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:16,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 00:53:16,463 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:16,464 INFO L82 PathProgramCache]: Analyzing trace with hash 56431112, now seen corresponding path program 16 times [2020-11-07 00:53:16,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:16,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535542970] [2020-11-07 00:53:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:16,576 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:16,578 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:17,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:17,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-11-07 00:53:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:17,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535542970] [2020-11-07 00:53:17,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:17,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 00:53:17,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649946565] [2020-11-07 00:53:17,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 00:53:17,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:17,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 00:53:17,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 00:53:17,382 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 36 states. [2020-11-07 00:53:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:18,838 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2020-11-07 00:53:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 00:53:18,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 205 [2020-11-07 00:53:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:18,841 INFO L225 Difference]: With dead ends: 259 [2020-11-07 00:53:18,841 INFO L226 Difference]: Without dead ends: 228 [2020-11-07 00:53:18,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 00:53:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-07 00:53:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 220. [2020-11-07 00:53:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-11-07 00:53:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2020-11-07 00:53:18,861 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 205 [2020-11-07 00:53:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:18,861 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2020-11-07 00:53:18,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 00:53:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2020-11-07 00:53:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-11-07 00:53:18,863 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:18,863 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:18,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 00:53:18,863 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash 196525986, now seen corresponding path program 17 times [2020-11-07 00:53:18,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:18,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213265354] [2020-11-07 00:53:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:18,974 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:18,975 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:19,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:19,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-11-07 00:53:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:19,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213265354] [2020-11-07 00:53:19,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:19,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 00:53:19,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008940989] [2020-11-07 00:53:19,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 00:53:19,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 00:53:19,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 00:53:19,851 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 38 states. [2020-11-07 00:53:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:21,366 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2020-11-07 00:53:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-07 00:53:21,368 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 215 [2020-11-07 00:53:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:21,370 INFO L225 Difference]: With dead ends: 269 [2020-11-07 00:53:21,370 INFO L226 Difference]: Without dead ends: 238 [2020-11-07 00:53:21,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 00:53:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-07 00:53:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2020-11-07 00:53:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-11-07 00:53:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2020-11-07 00:53:21,383 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 215 [2020-11-07 00:53:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:21,383 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2020-11-07 00:53:21,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 00:53:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2020-11-07 00:53:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-11-07 00:53:21,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:21,385 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:21,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 00:53:21,385 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:21,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1462744252, now seen corresponding path program 18 times [2020-11-07 00:53:21,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:21,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306511327] [2020-11-07 00:53:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:21,488 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:21,489 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:22,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:22,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-11-07 00:53:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:22,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306511327] [2020-11-07 00:53:22,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:22,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-11-07 00:53:22,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160923646] [2020-11-07 00:53:22,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 00:53:22,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:22,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 00:53:22,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 00:53:22,440 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand 40 states. [2020-11-07 00:53:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:24,209 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2020-11-07 00:53:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 00:53:24,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 225 [2020-11-07 00:53:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:24,212 INFO L225 Difference]: With dead ends: 279 [2020-11-07 00:53:24,213 INFO L226 Difference]: Without dead ends: 248 [2020-11-07 00:53:24,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 00:53:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-11-07 00:53:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-11-07 00:53:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-11-07 00:53:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2020-11-07 00:53:24,225 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 225 [2020-11-07 00:53:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:24,225 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2020-11-07 00:53:24,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 00:53:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2020-11-07 00:53:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-07 00:53:24,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:24,227 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:24,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 00:53:24,227 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:24,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1426812586, now seen corresponding path program 19 times [2020-11-07 00:53:24,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:24,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086494889] [2020-11-07 00:53:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:24,335 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:24,338 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:25,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:53:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:25,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-11-07 00:53:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:53:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:53:25,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086494889] [2020-11-07 00:53:25,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:53:25,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-11-07 00:53:25,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311363440] [2020-11-07 00:53:25,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 00:53:25,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:53:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 00:53:25,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 00:53:25,401 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 42 states. [2020-11-07 00:53:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:53:27,078 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2020-11-07 00:53:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 00:53:27,078 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 235 [2020-11-07 00:53:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:53:27,080 INFO L225 Difference]: With dead ends: 281 [2020-11-07 00:53:27,080 INFO L226 Difference]: Without dead ends: 250 [2020-11-07 00:53:27,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 00:53:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-07 00:53:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-11-07 00:53:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-11-07 00:53:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2020-11-07 00:53:27,093 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 235 [2020-11-07 00:53:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:53:27,093 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2020-11-07 00:53:27,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 00:53:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2020-11-07 00:53:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-11-07 00:53:27,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:53:27,095 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:53:27,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 00:53:27,096 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:53:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:53:27,096 INFO L82 PathProgramCache]: Analyzing trace with hash 887747952, now seen corresponding path program 20 times [2020-11-07 00:53:27,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:53:27,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545204377] [2020-11-07 00:53:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:53:27,193 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:53:27,195 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:53:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:53:27,311 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:53:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:53:27,442 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:53:27,538 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:53:27,539 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:53:27,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 00:53:27,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:53:27 BoogieIcfgContainer [2020-11-07 00:53:27,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:53:27,571 INFO L168 Benchmark]: Toolchain (without parser) took 31051.90 ms. Allocated memory was 156.2 MB in the beginning and 325.1 MB in the end (delta: 168.8 MB). Free memory was 131.6 MB in the beginning and 280.6 MB in the end (delta: -149.0 MB). Peak memory consumption was 191.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:53:27,571 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory was 104.2 MB in the beginning and 104.1 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:53:27,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.74 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 121.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:53:27,572 INFO L168 Benchmark]: Boogie Preprocessor took 63.63 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 119.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:53:27,573 INFO L168 Benchmark]: RCFGBuilder took 542.26 ms. Allocated memory is still 156.2 MB. Free memory was 119.6 MB in the beginning and 134.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. [2020-11-07 00:53:27,573 INFO L168 Benchmark]: TraceAbstraction took 30065.10 ms. Allocated memory was 156.2 MB in the beginning and 325.1 MB in the end (delta: 168.8 MB). Free memory was 134.1 MB in the beginning and 280.6 MB in the end (delta: -146.5 MB). Peak memory consumption was 194.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:53:27,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory was 104.2 MB in the beginning and 104.1 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 363.74 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 121.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.63 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 119.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 542.26 ms. Allocated memory is still 156.2 MB. Free memory was 119.6 MB in the beginning and 134.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 30065.10 ms. Allocated memory was 156.2 MB in the beginning and 325.1 MB in the end (delta: 168.8 MB). Free memory was 134.1 MB in the beginning and 280.6 MB in the end (delta: -146.5 MB). Peak memory consumption was 194.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L32] CALL, EXPR check(ad1, i) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] RET, EXPR check(ad1, i) [L32] COND TRUE !check(ad1, i) [L39] CALL reach_error() [L3] __assert_fail("0", "test24-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.9s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 16.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1149 SDtfs, 1877 SDslu, 14067 SDs, 0 SdLazy, 5871 SolverSat, 325 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7391 ImplicationChecksByTransitivity, 16.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=250occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 21 MinimizatonAttempts, 152 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 incorrect! Received shutdown request...