/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:21:39,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:21:39,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:21:39,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:21:39,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:21:39,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:21:39,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:21:39,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:21:39,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:21:39,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:21:39,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:21:39,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:21:39,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:21:39,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:21:39,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:21:39,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:21:39,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:21:39,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:21:39,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:21:39,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:21:39,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:21:39,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:21:39,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:21:39,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:21:39,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:21:39,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:21:39,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:21:39,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:21:39,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:21:39,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:21:39,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:21:39,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:21:39,439 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:21:39,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:21:39,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:21:39,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:21:39,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:21:39,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:21:39,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:21:39,442 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:21:39,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:21:39,442 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:21:39,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:21:39,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:21:39,443 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:21:39,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:21:39,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:21:39,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:21:39,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:21:39,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:21:39,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:21:39,445 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:21:39,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:21:39,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:21:39,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:21:39,753 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:21:39,754 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:21:39,754 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-07-07 13:21:39,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0389d44bc/fa656b147b0b484ea554d3e6908a5d2c/FLAGc877fa38c [2020-07-07 13:21:40,382 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:21:40,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-07-07 13:21:40,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0389d44bc/fa656b147b0b484ea554d3e6908a5d2c/FLAGc877fa38c [2020-07-07 13:21:40,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0389d44bc/fa656b147b0b484ea554d3e6908a5d2c [2020-07-07 13:21:40,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:21:40,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:21:40,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:21:40,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:21:40,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:21:40,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:21:40" (1/1) ... [2020-07-07 13:21:40,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fccddc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:40, skipping insertion in model container [2020-07-07 13:21:40,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:21:40" (1/1) ... [2020-07-07 13:21:40,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:21:40,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:21:41,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:21:41,032 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:21:41,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:21:41,068 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:21:41,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41 WrapperNode [2020-07-07 13:21:41,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:21:41,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:21:41,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:21:41,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:21:41,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (1/1) ... [2020-07-07 13:21:41,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (1/1) ... [2020-07-07 13:21:41,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (1/1) ... [2020-07-07 13:21:41,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (1/1) ... [2020-07-07 13:21:41,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (1/1) ... [2020-07-07 13:21:41,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (1/1) ... [2020-07-07 13:21:41,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (1/1) ... [2020-07-07 13:21:41,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:21:41,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:21:41,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:21:41,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:21:41,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (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 [2020-07-07 13:21:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:21:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:21:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:21:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:21:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 13:21:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:21:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-07-07 13:21:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:21:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:21:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:21:41,498 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:21:41,498 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 13:21:41,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:21:41 BoogieIcfgContainer [2020-07-07 13:21:41,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:21:41,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:21:41,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:21:41,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:21:41,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:21:40" (1/3) ... [2020-07-07 13:21:41,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1a8b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:21:41, skipping insertion in model container [2020-07-07 13:21:41,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:21:41" (2/3) ... [2020-07-07 13:21:41,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1a8b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:21:41, skipping insertion in model container [2020-07-07 13:21:41,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:21:41" (3/3) ... [2020-07-07 13:21:41,513 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-07-07 13:21:41,528 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:21:41,538 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:21:41,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:21:41,595 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:21:41,595 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:21:41,595 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:21:41,596 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:21:41,596 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:21:41,596 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:21:41,596 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:21:41,597 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:21:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-07-07 13:21:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 13:21:41,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:41,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:21:41,632 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:41,640 INFO L82 PathProgramCache]: Analyzing trace with hash -936940309, now seen corresponding path program 1 times [2020-07-07 13:21:41,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:41,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129837644] [2020-07-07 13:21:41,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:21:41,827 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:41,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129837644] [2020-07-07 13:21:41,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:41,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:41,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075525813] [2020-07-07 13:21:41,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:41,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:41,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:41,854 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-07-07 13:21:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:41,985 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-07-07 13:21:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:41,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-07 13:21:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:42,000 INFO L225 Difference]: With dead ends: 110 [2020-07-07 13:21:42,000 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 13:21:42,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 13:21:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-07 13:21:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 13:21:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-07-07 13:21:42,066 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 15 [2020-07-07 13:21:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:42,067 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-07-07 13:21:42,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-07-07 13:21:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 13:21:42,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:42,069 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:21:42,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:21:42,070 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:42,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1261763386, now seen corresponding path program 1 times [2020-07-07 13:21:42,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:42,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907590014] [2020-07-07 13:21:42,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:21:42,177 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:42,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907590014] [2020-07-07 13:21:42,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:42,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:42,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872284317] [2020-07-07 13:21:42,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:42,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:42,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:42,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,183 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 3 states. [2020-07-07 13:21:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:42,335 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-07-07 13:21:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:42,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-07 13:21:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:42,341 INFO L225 Difference]: With dead ends: 134 [2020-07-07 13:21:42,341 INFO L226 Difference]: Without dead ends: 80 [2020-07-07 13:21:42,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-07 13:21:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-07-07 13:21:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-07 13:21:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-07-07 13:21:42,385 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 22 [2020-07-07 13:21:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:42,386 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-07-07 13:21:42,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-07-07 13:21:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 13:21:42,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:42,391 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:21:42,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:21:42,394 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:42,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:42,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1258903450, now seen corresponding path program 1 times [2020-07-07 13:21:42,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:42,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366120242] [2020-07-07 13:21:42,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:21:42,493 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:42,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366120242] [2020-07-07 13:21:42,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:42,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:42,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113073337] [2020-07-07 13:21:42,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:42,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:42,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:42,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,497 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 3 states. [2020-07-07 13:21:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:42,580 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-07-07 13:21:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:42,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-07 13:21:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:42,582 INFO L225 Difference]: With dead ends: 140 [2020-07-07 13:21:42,582 INFO L226 Difference]: Without dead ends: 105 [2020-07-07 13:21:42,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-07 13:21:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-07-07 13:21:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-07 13:21:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-07-07 13:21:42,602 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 22 [2020-07-07 13:21:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:42,603 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-07-07 13:21:42,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-07-07 13:21:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 13:21:42,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:42,605 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] [2020-07-07 13:21:42,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:21:42,605 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:42,606 INFO L82 PathProgramCache]: Analyzing trace with hash 122238776, now seen corresponding path program 1 times [2020-07-07 13:21:42,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:42,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029172540] [2020-07-07 13:21:42,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:21:42,664 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:42,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029172540] [2020-07-07 13:21:42,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:42,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:42,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893262235] [2020-07-07 13:21:42,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:42,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,669 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 3 states. [2020-07-07 13:21:42,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:42,771 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2020-07-07 13:21:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:42,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-07 13:21:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:42,774 INFO L225 Difference]: With dead ends: 200 [2020-07-07 13:21:42,774 INFO L226 Difference]: Without dead ends: 136 [2020-07-07 13:21:42,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-07 13:21:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-07-07 13:21:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-07 13:21:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2020-07-07 13:21:42,796 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 30 [2020-07-07 13:21:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:42,797 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2020-07-07 13:21:42,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2020-07-07 13:21:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 13:21:42,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:42,799 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-07 13:21:42,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:21:42,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1207592178, now seen corresponding path program 1 times [2020-07-07 13:21:42,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:42,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010378956] [2020-07-07 13:21:42,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:21:42,844 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:42,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010378956] [2020-07-07 13:21:42,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:42,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:42,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811659867] [2020-07-07 13:21:42,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:42,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:42,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:42,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,866 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 3 states. [2020-07-07 13:21:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:42,920 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-07-07 13:21:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:42,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-07-07 13:21:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:42,923 INFO L225 Difference]: With dead ends: 248 [2020-07-07 13:21:42,923 INFO L226 Difference]: Without dead ends: 103 [2020-07-07 13:21:42,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-07 13:21:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-07-07 13:21:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-07 13:21:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-07-07 13:21:42,939 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 34 [2020-07-07 13:21:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:42,939 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-07-07 13:21:42,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-07-07 13:21:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 13:21:42,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:21:42,942 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2020-07-07 13:21:42,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:21:42,943 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:21:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:21:42,943 INFO L82 PathProgramCache]: Analyzing trace with hash 340924863, now seen corresponding path program 1 times [2020-07-07 13:21:42,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:21:42,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249497930] [2020-07-07 13:21:42,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:21:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:21:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:21:43,000 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:21:43,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249497930] [2020-07-07 13:21:43,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:21:43,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:21:43,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534336582] [2020-07-07 13:21:43,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:21:43,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:21:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:21:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:43,002 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 3 states. [2020-07-07 13:21:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:21:43,021 INFO L93 Difference]: Finished difference Result 157 states and 180 transitions. [2020-07-07 13:21:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:21:43,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-07-07 13:21:43,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:21:43,023 INFO L225 Difference]: With dead ends: 157 [2020-07-07 13:21:43,023 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 13:21:43,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:21:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 13:21:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 13:21:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 13:21:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 13:21:43,026 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-07-07 13:21:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:21:43,026 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 13:21:43,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:21:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 13:21:43,027 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 13:21:43,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:21:43,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 13:21:43,582 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 13:21:43,583 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 13:21:43,583 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 13:21:43,583 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 13:21:43,583 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 13:21:43,584 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 13:21:43,584 INFO L264 CegarLoopResult]: At program point L93(line 93) the Hoare annotation is: false [2020-07-07 13:21:43,584 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 8 140) the Hoare annotation is: true [2020-07-07 13:21:43,584 INFO L264 CegarLoopResult]: At program point L77-1(lines 53 106) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) .cse0))) [2020-07-07 13:21:43,584 INFO L271 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-07-07 13:21:43,585 INFO L264 CegarLoopResult]: At program point L69(lines 69 73) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,585 INFO L264 CegarLoopResult]: At program point L61(line 61) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 2)) (<= main_~blastFlag~0 0)) [2020-07-07 13:21:43,585 INFO L264 CegarLoopResult]: At program point L78(line 78) the Hoare annotation is: (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) [2020-07-07 13:21:43,585 INFO L264 CegarLoopResult]: At program point L45(lines 45 110) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) (<= main_~blastFlag~0 2)) [2020-07-07 13:21:43,585 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-07-07 13:21:43,586 INFO L271 CegarLoopResult]: At program point L136(lines 8 140) the Hoare annotation is: true [2020-07-07 13:21:43,586 INFO L264 CegarLoopResult]: At program point L70(line 70) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,586 INFO L264 CegarLoopResult]: At program point L95(lines 95 97) the Hoare annotation is: (and (<= 8656 main_~s__state~0) (<= main_~blastFlag~0 3)) [2020-07-07 13:21:43,586 INFO L264 CegarLoopResult]: At program point L29(lines 29 124) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) (<= main_~blastFlag~0 2)) [2020-07-07 13:21:43,587 INFO L264 CegarLoopResult]: At program point L46(lines 45 110) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) .cse0))) [2020-07-07 13:21:43,587 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 8 140) the Hoare annotation is: true [2020-07-07 13:21:43,587 INFO L264 CegarLoopResult]: At program point L96(lines 8 140) the Hoare annotation is: false [2020-07-07 13:21:43,587 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) the Hoare annotation is: false [2020-07-07 13:21:43,587 INFO L264 CegarLoopResult]: At program point L63(line 63) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,588 INFO L264 CegarLoopResult]: At program point L30(lines 29 124) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,588 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 140) the Hoare annotation is: true [2020-07-07 13:21:43,589 INFO L264 CegarLoopResult]: At program point L88-1(lines 53 106) the Hoare annotation is: (and (<= 8656 main_~s__state~0) (<= main_~blastFlag~0 3)) [2020-07-07 13:21:43,589 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-07-07 13:21:43,589 INFO L264 CegarLoopResult]: At program point L72(line 72) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,589 INFO L264 CegarLoopResult]: At program point L89(line 89) the Hoare annotation is: (and (<= 8656 main_~s__state~0) (<= main_~blastFlag~0 2)) [2020-07-07 13:21:43,589 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-07-07 13:21:43,590 INFO L264 CegarLoopResult]: At program point L139(line 139) the Hoare annotation is: false [2020-07-07 13:21:43,590 INFO L264 CegarLoopResult]: At program point L24(lines 24 127) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) (<= main_~blastFlag~0 2)) [2020-07-07 13:21:43,590 INFO L264 CegarLoopResult]: At program point L57-1(lines 53 106) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,590 INFO L264 CegarLoopResult]: At program point L49(lines 49 108) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) (<= main_~blastFlag~0 2)) [2020-07-07 13:21:43,591 INFO L264 CegarLoopResult]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) (<= main_~blastFlag~0 2)) [2020-07-07 13:21:43,591 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (<= main_~blastFlag~0 0) [2020-07-07 13:21:43,591 INFO L264 CegarLoopResult]: At program point L25(lines 24 127) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,591 INFO L264 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: (and (<= main_~blastFlag~0 2) (<= 8640 main_~s__state~0)) [2020-07-07 13:21:43,592 INFO L264 CegarLoopResult]: At program point L50(lines 49 108) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and .cse0 (<= main_~blastFlag~0 2)) (and .cse0 (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3)))) [2020-07-07 13:21:43,592 INFO L264 CegarLoopResult]: At program point L100(line 100) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and .cse0 (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3)) (and .cse0 (<= main_~blastFlag~0 0)))) [2020-07-07 13:21:43,592 INFO L264 CegarLoopResult]: At program point L92-1(lines 53 106) the Hoare annotation is: (and (<= 8656 main_~s__state~0) (<= main_~blastFlag~0 3)) [2020-07-07 13:21:43,593 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) (<= main_~blastFlag~0 2)) [2020-07-07 13:21:43,593 INFO L271 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: true [2020-07-07 13:21:43,593 INFO L271 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: true [2020-07-07 13:21:43,593 INFO L271 CegarLoopResult]: At program point L10-2(line 10) the Hoare annotation is: true [2020-07-07 13:21:43,593 INFO L264 CegarLoopResult]: At program point L68(line 68) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,594 INFO L264 CegarLoopResult]: At program point L68-1(line 68) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-07 13:21:43,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:21:43 BoogieIcfgContainer [2020-07-07 13:21:43,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:21:43,621 INFO L168 Benchmark]: Toolchain (without parser) took 2879.97 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 103.6 MB in the beginning and 110.9 MB in the end (delta: -7.2 MB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:43,622 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:21:43,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.30 ms. Allocated memory is still 138.4 MB. Free memory was 103.2 MB in the beginning and 93.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:43,624 INFO L168 Benchmark]: Boogie Preprocessor took 119.57 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.0 MB in the beginning and 180.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:43,625 INFO L168 Benchmark]: RCFGBuilder took 315.00 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 164.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:43,626 INFO L168 Benchmark]: TraceAbstraction took 2113.03 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 163.7 MB in the beginning and 110.9 MB in the end (delta: 52.8 MB). Peak memory consumption was 85.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:21:43,631 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 327.30 ms. Allocated memory is still 138.4 MB. Free memory was 103.2 MB in the beginning and 93.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.57 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.0 MB in the beginning and 180.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.00 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 164.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2113.03 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 163.7 MB in the beginning and 110.9 MB in the end (delta: 52.8 MB). Peak memory consumption was 85.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 138]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (8656 <= s__state && blastFlag <= 2) || ((8656 <= s__state && !(0 == s__hit)) && blastFlag <= 3) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) || blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - ProcedureContractResult [Line: 8]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 295 SDtfs, 129 SDslu, 194 SDs, 0 SdLazy, 106 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 48 LocationsWithAnnotation, 48 PreInvPairs, 162 NumberOfFragments, 272 HoareAnnotationTreeSize, 48 FomulaSimplifications, 975 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 48 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...