/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:11:51,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:11:51,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:11:51,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:11:51,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:11:51,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:11:51,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:11:51,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:11:51,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:11:51,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:11:51,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:11:51,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:11:51,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:11:51,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:11:51,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:11:51,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:11:51,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:11:51,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:11:51,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:11:51,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:11:51,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:11:51,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:11:52,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:11:52,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:11:52,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:11:52,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:11:52,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:11:52,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:11:52,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:11:52,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:11:52,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:11:52,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:11:52,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:11:52,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:11:52,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:11:52,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:11:52,025 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 02:11:52,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:11:52,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:11:52,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:11:52,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:11:52,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:11:52,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:11:52,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:11:52,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:11:52,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:11:52,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:11:52,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:11:52,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:11:52,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:11:52,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:11:52,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:11:52,059 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:11:52,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:11:52,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:11:52,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:11:52,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:11:52,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:11:52,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:11:52,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:11:52,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:11:52,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:11:52,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:11:52,485 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:11:52,486 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:11:52,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-11-07 02:11:52,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef29608e/73b838f42f56445fbf85d1a0a9065865/FLAG8e89801ff [2020-11-07 02:11:53,152 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:11:53,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-11-07 02:11:53,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef29608e/73b838f42f56445fbf85d1a0a9065865/FLAG8e89801ff [2020-11-07 02:11:53,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef29608e/73b838f42f56445fbf85d1a0a9065865 [2020-11-07 02:11:53,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:11:53,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:11:53,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:11:53,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:11:53,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:11:53,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ee6e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53, skipping insertion in model container [2020-11-07 02:11:53,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:11:53,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:11:53,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:11:53,726 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:11:53,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:11:53,767 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:11:53,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53 WrapperNode [2020-11-07 02:11:53,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:11:53,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:11:53,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:11:53,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:11:53,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:11:53,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:11:53,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:11:53,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:11:53,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (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 02:11:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:11:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:11:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:11:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:11:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:11:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:11:53,891 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:11:53,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:11:53,892 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:11:53,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:11:53,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:11:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:11:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:11:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:11:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:11:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:11:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:11:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:11:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:11:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:11:54,275 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:11:54,276 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:11:54,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:54 BoogieIcfgContainer [2020-11-07 02:11:54,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:11:54,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:11:54,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:11:54,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:11:54,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:11:53" (1/3) ... [2020-11-07 02:11:54,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc962ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:54, skipping insertion in model container [2020-11-07 02:11:54,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (2/3) ... [2020-11-07 02:11:54,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc962ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:54, skipping insertion in model container [2020-11-07 02:11:54,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:54" (3/3) ... [2020-11-07 02:11:54,329 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-11-07 02:11:54,351 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:11:54,358 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:11:54,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:11:54,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:11:54,422 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:11:54,422 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:11:54,422 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:11:54,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:11:54,423 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:11:54,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:11:54,423 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:11:54,451 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-11-07 02:11:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 02:11:54,466 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:54,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:54,468 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1036611502, now seen corresponding path program 1 times [2020-11-07 02:11:54,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:54,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194471512] [2020-11-07 02:11:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:54,580 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:54,916 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-11-07 02:11:54,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:54,971 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 02:11:54,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194471512] [2020-11-07 02:11:54,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:54,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 02:11:54,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225519114] [2020-11-07 02:11:54,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 02:11:54,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:54,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 02:11:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:11:55,003 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-11-07 02:11:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:55,142 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-11-07 02:11:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 02:11:55,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-11-07 02:11:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:55,154 INFO L225 Difference]: With dead ends: 65 [2020-11-07 02:11:55,155 INFO L226 Difference]: Without dead ends: 41 [2020-11-07 02:11:55,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:11:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-07 02:11:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-07 02:11:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-07 02:11:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-07 02:11:55,219 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2020-11-07 02:11:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:55,220 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-07 02:11:55,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 02:11:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-07 02:11:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 02:11:55,223 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:55,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:55,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:11:55,224 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash 149107821, now seen corresponding path program 1 times [2020-11-07 02:11:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:55,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385380531] [2020-11-07 02:11:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:55,233 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:55,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:55,744 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 02:11:55,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385380531] [2020-11-07 02:11:55,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:55,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 02:11:55,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107581175] [2020-11-07 02:11:55,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 02:11:55,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:55,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 02:11:55,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-07 02:11:55,748 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 11 states. [2020-11-07 02:11:56,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:56,898 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2020-11-07 02:11:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 02:11:56,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-11-07 02:11:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:56,902 INFO L225 Difference]: With dead ends: 101 [2020-11-07 02:11:56,902 INFO L226 Difference]: Without dead ends: 81 [2020-11-07 02:11:56,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-11-07 02:11:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-07 02:11:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2020-11-07 02:11:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 02:11:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-07 02:11:56,923 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 30 [2020-11-07 02:11:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:56,923 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-07 02:11:56,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 02:11:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-07 02:11:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 02:11:56,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:56,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:56,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:11:56,926 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:56,926 INFO L82 PathProgramCache]: Analyzing trace with hash 824943879, now seen corresponding path program 1 times [2020-11-07 02:11:56,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:56,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990718099] [2020-11-07 02:11:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:00,037 WARN L194 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-11-07 02:12:00,051 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:00,054 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:01,103 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-11-07 02:12:01,257 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2020-11-07 02:12:01,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:01,504 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 02:12:01,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990718099] [2020-11-07 02:12:01,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:01,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 02:12:01,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015174702] [2020-11-07 02:12:01,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 02:12:01,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 02:12:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-07 02:12:01,519 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 18 states. [2020-11-07 02:12:01,797 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-11-07 02:12:01,960 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-11-07 02:12:02,154 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-11-07 02:12:02,356 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-07 02:12:02,560 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-11-07 02:12:02,782 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-11-07 02:12:03,070 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-07 02:12:03,349 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-11-07 02:12:03,657 WARN L194 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-11-07 02:12:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:06,305 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-11-07 02:12:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 02:12:06,306 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-11-07 02:12:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:06,309 INFO L225 Difference]: With dead ends: 68 [2020-11-07 02:12:06,309 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 02:12:06,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-11-07 02:12:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 02:12:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-11-07 02:12:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-07 02:12:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-11-07 02:12:06,329 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2020-11-07 02:12:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:06,329 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-11-07 02:12:06,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 02:12:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-11-07 02:12:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 02:12:06,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:06,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:06,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:12:06,331 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash 674642081, now seen corresponding path program 2 times [2020-11-07 02:12:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:06,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019292108] [2020-11-07 02:12:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:08,444 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:12:10,533 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:12:12,752 WARN L194 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2020-11-07 02:12:16,093 WARN L194 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-11-07 02:12:16,095 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:16,097 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:16,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:16,602 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 02:12:16,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019292108] [2020-11-07 02:12:16,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:16,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:12:16,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345070946] [2020-11-07 02:12:16,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:12:16,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:16,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:12:16,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:12:16,605 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 8 states. [2020-11-07 02:12:16,865 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-11-07 02:12:17,056 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-07 02:12:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:17,425 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-11-07 02:12:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:12:17,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-11-07 02:12:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:17,430 INFO L225 Difference]: With dead ends: 72 [2020-11-07 02:12:17,430 INFO L226 Difference]: Without dead ends: 55 [2020-11-07 02:12:17,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-07 02:12:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-07 02:12:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-11-07 02:12:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-07 02:12:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-11-07 02:12:17,467 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-11-07 02:12:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:17,468 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-11-07 02:12:17,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:12:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-11-07 02:12:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 02:12:17,472 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:17,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:17,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:12:17,473 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1394265352, now seen corresponding path program 1 times [2020-11-07 02:12:17,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:17,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264495704] [2020-11-07 02:12:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:19,574 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:12:21,658 WARN L194 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:12:23,918 WARN L194 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2020-11-07 02:12:26,021 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 24 [2020-11-07 02:12:27,348 WARN L194 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-11-07 02:12:31,385 WARN L194 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-11-07 02:12:31,387 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:31,388 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:31,557 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 02:12:31,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264495704] [2020-11-07 02:12:31,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:31,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:12:31,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301790527] [2020-11-07 02:12:31,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:12:31,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:12:31,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:12:31,559 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-11-07 02:12:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:31,971 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-11-07 02:12:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:12:31,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-11-07 02:12:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:31,973 INFO L225 Difference]: With dead ends: 71 [2020-11-07 02:12:31,973 INFO L226 Difference]: Without dead ends: 54 [2020-11-07 02:12:31,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:12:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-07 02:12:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-11-07 02:12:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-07 02:12:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-11-07 02:12:32,001 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2020-11-07 02:12:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:32,007 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-11-07 02:12:32,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:12:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-11-07 02:12:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-07 02:12:32,013 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:32,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:32,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:12:32,014 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:32,014 INFO L82 PathProgramCache]: Analyzing trace with hash -200289605, now seen corresponding path program 1 times [2020-11-07 02:12:32,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:32,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985482571] [2020-11-07 02:12:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:34,115 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:12:36,200 WARN L194 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:12:56,195 WARN L194 SmtUtils]: Spent 19.96 s on a formula simplification. DAG size of input: 8993 DAG size of output: 140 [2020-11-07 02:12:58,304 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:13:00,408 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:13:02,145 WARN L194 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2020-11-07 02:13:03,312 WARN L194 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-11-07 02:13:03,315 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:03,316 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:07,817 WARN L194 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-11-07 02:13:08,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:08,092 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 02:13:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985482571] [2020-11-07 02:13:08,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:08,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 02:13:08,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243194976] [2020-11-07 02:13:08,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 02:13:08,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:08,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 02:13:08,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-07 02:13:08,096 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-11-07 02:13:08,439 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-11-07 02:13:08,844 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-11-07 02:13:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:09,245 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-11-07 02:13:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:13:09,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-11-07 02:13:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:09,248 INFO L225 Difference]: With dead ends: 70 [2020-11-07 02:13:09,248 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 02:13:09,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-07 02:13:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 02:13:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-11-07 02:13:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 02:13:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-11-07 02:13:09,281 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-11-07 02:13:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:09,281 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-11-07 02:13:09,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 02:13:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-11-07 02:13:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 02:13:09,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:09,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:09,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:13:09,288 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -519925598, now seen corresponding path program 1 times [2020-11-07 02:13:09,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:09,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252070186] [2020-11-07 02:13:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:11,402 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:13:13,497 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:13:17,067 WARN L194 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 179 DAG size of output: 123 [2020-11-07 02:13:23,497 WARN L194 SmtUtils]: Spent 6.33 s on a formula simplification that was a NOOP. DAG size: 33 [2020-11-07 02:13:28,330 WARN L194 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 937 DAG size of output: 113 [2020-11-07 02:13:31,697 WARN L194 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-11-07 02:13:31,699 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:31,700 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:31,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:31,877 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 02:13:31,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252070186] [2020-11-07 02:13:31,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:31,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:13:31,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441503161] [2020-11-07 02:13:31,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:13:31,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:31,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:13:31,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:13:31,880 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-11-07 02:13:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:32,250 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-11-07 02:13:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:13:32,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-11-07 02:13:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:32,253 INFO L225 Difference]: With dead ends: 69 [2020-11-07 02:13:32,254 INFO L226 Difference]: Without dead ends: 52 [2020-11-07 02:13:32,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:13:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-07 02:13:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-11-07 02:13:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-07 02:13:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-11-07 02:13:32,280 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2020-11-07 02:13:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:32,280 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-11-07 02:13:32,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:13:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-11-07 02:13:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 02:13:32,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:32,281 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:32,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:13:32,282 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash -713857982, now seen corresponding path program 1 times [2020-11-07 02:13:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:32,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237710979] [2020-11-07 02:13:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:34,380 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:13:36,468 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:13:39,153 WARN L194 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-11-07 02:13:40,446 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-11-07 02:13:44,676 WARN L194 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-11-07 02:13:48,584 WARN L194 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 111 DAG size of output: 111 [2020-11-07 02:13:48,585 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:48,587 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:49,991 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-11-07 02:13:50,173 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-11-07 02:13:50,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:50,473 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 02:13:50,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237710979] [2020-11-07 02:13:50,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:50,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 02:13:50,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938069094] [2020-11-07 02:13:50,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 02:13:50,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:50,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 02:13:50,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:13:50,476 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-11-07 02:13:50,819 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-11-07 02:13:51,020 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-11-07 02:13:51,223 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-11-07 02:13:51,444 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-07 02:13:51,678 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-11-07 02:13:51,919 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-11-07 02:13:52,270 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 02:13:52,605 WARN L194 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-11-07 02:13:52,942 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-11-07 02:13:53,319 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-11-07 02:13:53,636 WARN L194 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-11-07 02:13:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:54,323 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-11-07 02:13:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 02:13:54,324 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-11-07 02:13:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:54,327 INFO L225 Difference]: With dead ends: 80 [2020-11-07 02:13:54,327 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 02:13:54,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 02:13:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 02:13:54,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-11-07 02:13:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 02:13:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-11-07 02:13:54,357 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2020-11-07 02:13:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:54,358 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-11-07 02:13:54,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 02:13:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-11-07 02:13:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 02:13:54,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:54,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:54,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:13:54,361 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash -674897316, now seen corresponding path program 2 times [2020-11-07 02:13:54,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:54,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343535711] [2020-11-07 02:13:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:58,675 WARN L194 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-11-07 02:14:00,835 WARN L194 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 31 [2020-11-07 02:14:05,626 WARN L194 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 182 DAG size of output: 146 [2020-11-07 02:14:07,730 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:14:09,831 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-07 02:14:12,659 WARN L194 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-11-07 02:14:14,706 WARN L194 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2020-11-07 02:14:18,946 WARN L194 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-11-07 02:14:21,057 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 30