/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/array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:45:38,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:45:38,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:45:38,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:45:38,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:45:38,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:45:38,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:45:38,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:45:38,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:45:38,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:45:38,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:45:38,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:45:38,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:45:38,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:45:38,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:45:38,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:45:38,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:45:38,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:45:38,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:45:38,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:45:38,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:45:38,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:45:38,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:45:38,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:45:38,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:45:38,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:45:38,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:45:38,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:45:38,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:45:38,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:45:38,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:45:38,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:45:38,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:45:38,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:45:38,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:45:38,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:45:38,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:45:38,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:45:38,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:45:38,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:45:38,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:45:38,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:45:38,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:45:38,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:45:38,520 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:45:38,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:45:38,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:45:38,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:45:38,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:45:38,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:45:38,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:45:38,522 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:45:38,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:45:38,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:45:38,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:45:38,951 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:45:38,952 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:45:38,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-1.c [2020-10-23 21:45:39,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f86429ee/5bdd9ae5e2794bc1bc8426938e93e2e9/FLAGd8742a8f1 [2020-10-23 21:45:39,730 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:45:39,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-1.c [2020-10-23 21:45:39,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f86429ee/5bdd9ae5e2794bc1bc8426938e93e2e9/FLAGd8742a8f1 [2020-10-23 21:45:40,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f86429ee/5bdd9ae5e2794bc1bc8426938e93e2e9 [2020-10-23 21:45:40,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:45:40,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:45:40,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:40,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:45:40,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:45:40,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fbf87f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40, skipping insertion in model container [2020-10-23 21:45:40,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:45:40,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:45:40,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:40,481 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:45:40,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:40,541 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:45:40,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40 WrapperNode [2020-10-23 21:45:40,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:40,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:45:40,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:45:40,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:45:40,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (1/1) ... [2020-10-23 21:45:40,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:45:40,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:45:40,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:45:40,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:45:40,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:45:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:45:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:45:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:45:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:45:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:45:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:45:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:45:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:45:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:45:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:45:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:45:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:45:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:45:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:45:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:45:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:45:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:45:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:45:41,073 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:45:41,074 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:45:41,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:41 BoogieIcfgContainer [2020-10-23 21:45:41,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:45:41,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:45:41,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:45:41,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:45:41,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:45:40" (1/3) ... [2020-10-23 21:45:41,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e38986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:41, skipping insertion in model container [2020-10-23 21:45:41,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:40" (2/3) ... [2020-10-23 21:45:41,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e38986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:41, skipping insertion in model container [2020-10-23 21:45:41,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:41" (3/3) ... [2020-10-23 21:45:41,087 INFO L111 eAbstractionObserver]: Analyzing ICFG array-1.c [2020-10-23 21:45:41,102 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:45:41,108 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:45:41,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:45:41,157 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:45:41,158 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:45:41,158 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:45:41,158 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:45:41,158 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:45:41,158 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:45:41,159 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:45:41,159 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:45:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-23 21:45:41,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 21:45:41,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:41,187 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] [2020-10-23 21:45:41,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:41,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1278543435, now seen corresponding path program 1 times [2020-10-23 21:45:41,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:41,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857659513] [2020-10-23 21:45:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:41,287 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:41,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:41,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857659513] [2020-10-23 21:45:41,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:41,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:45:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744719633] [2020-10-23 21:45:41,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:45:41,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:41,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:45:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:45:41,785 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 5 states. [2020-10-23 21:45:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:42,085 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-10-23 21:45:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:45:42,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-23 21:45:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:42,096 INFO L225 Difference]: With dead ends: 85 [2020-10-23 21:45:42,096 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 21:45:42,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:45:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 21:45:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-10-23 21:45:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 21:45:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-23 21:45:42,150 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 28 [2020-10-23 21:45:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:42,151 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-23 21:45:42,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:45:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-23 21:45:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 21:45:42,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:42,153 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] [2020-10-23 21:45:42,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:45:42,153 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:42,155 INFO L82 PathProgramCache]: Analyzing trace with hash -117529283, now seen corresponding path program 1 times [2020-10-23 21:45:42,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:42,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070545313] [2020-10-23 21:45:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:42,230 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 21:45:42,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:45:58,028 WARN L193 SmtUtils]: Spent 15.70 s on a formula simplification. DAG size of input: 170 DAG size of output: 170 [2020-10-23 21:45:58,054 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:58,058 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:58,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:58,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070545313] [2020-10-23 21:45:58,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:58,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:45:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489761194] [2020-10-23 21:45:58,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:45:58,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:58,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:45:58,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:45:58,744 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2020-10-23 21:45:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:59,315 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-23 21:45:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:45:59,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-23 21:45:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:59,320 INFO L225 Difference]: With dead ends: 68 [2020-10-23 21:45:59,320 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 21:45:59,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:45:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 21:45:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-23 21:45:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 21:45:59,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-23 21:45:59,344 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 38 [2020-10-23 21:45:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:59,344 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-23 21:45:59,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:45:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-23 21:45:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 21:45:59,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:59,349 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] [2020-10-23 21:45:59,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:45:59,349 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:59,350 INFO L82 PathProgramCache]: Analyzing trace with hash 148052226, now seen corresponding path program 1 times [2020-10-23 21:45:59,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:59,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616979461] [2020-10-23 21:45:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:59,416 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 21:45:59,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:45:59,534 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:46:21,400 WARN L193 SmtUtils]: Spent 21.86 s on a formula simplification. DAG size of input: 183 DAG size of output: 183 [2020-10-23 21:46:21,405 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:21,407 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:21,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:21,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616979461] [2020-10-23 21:46:21,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:21,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:46:21,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353296098] [2020-10-23 21:46:21,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:46:21,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:21,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:46:21,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:46:21,835 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 10 states. [2020-10-23 21:46:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:22,365 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-23 21:46:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 21:46:22,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-23 21:46:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:22,370 INFO L225 Difference]: With dead ends: 70 [2020-10-23 21:46:22,370 INFO L226 Difference]: Without dead ends: 63 [2020-10-23 21:46:22,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:46:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-23 21:46:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-10-23 21:46:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 21:46:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-23 21:46:22,384 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 41 [2020-10-23 21:46:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:22,385 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-23 21:46:22,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:46:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-23 21:46:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 21:46:22,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:22,387 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] [2020-10-23 21:46:22,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:46:22,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:22,388 INFO L82 PathProgramCache]: Analyzing trace with hash -452215377, now seen corresponding path program 2 times [2020-10-23 21:46:22,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:22,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423292396] [2020-10-23 21:46:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:22,443 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 21:46:22,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:47:57,329 WARN L193 SmtUtils]: Spent 1.58 m on a formula simplification. DAG size of input: 242 DAG size of output: 217 [2020-10-23 21:47:57,398 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 21:47:57,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:47:57,568 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-23 21:48:58,902 WARN L193 SmtUtils]: Spent 1.02 m on a formula simplification. DAG size of input: 172 DAG size of output: 172 [2020-10-23 21:48:59,223 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-23 21:50:29,275 WARN L193 SmtUtils]: Spent 1.50 m on a formula simplification. DAG size of input: 168 DAG size of output: 168 [2020-10-23 21:50:29,371 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 21:50:29,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:50:29,628 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-23 21:51:51,040 WARN L193 SmtUtils]: Spent 1.36 m on a formula simplification. DAG size of input: 170 DAG size of output: 170 [2020-10-23 21:51:51,176 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-23 21:51:51,181 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 21:51:51,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:51:53,895 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 55 [2020-10-23 21:55:47,180 WARN L193 SmtUtils]: Spent 3.89 m on a formula simplification. DAG size of input: 276 DAG size of output: 243 [2020-10-23 21:55:49,372 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 47 [2020-10-23 21:55:49,376 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 21:55:49,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:55:50,091 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 55