/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 0.1.25-3af5e1f [2020-09-04 16:33:48,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:33:48,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:33:48,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:33:48,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:33:48,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:33:48,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:33:48,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:33:48,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:33:48,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:33:48,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:33:48,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:33:48,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:33:48,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:33:48,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:33:48,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:33:48,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:33:48,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:33:48,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:33:48,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:33:48,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:33:48,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:33:48,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:33:48,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:33:48,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:33:48,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:33:48,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:33:48,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:33:48,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:33:48,651 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:33:48,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:33:48,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:33:48,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:33:48,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:33:48,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:33:48,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:33:48,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:33:48,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:33:48,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:33:48,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:33:48,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:33:48,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:33:48,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:33:48,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:33:48,658 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:33:48,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:33:48,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:33:48,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:33:48,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:33:48,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:33:48,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:33:48,660 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:33:49,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:33:49,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:33:49,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:33:49,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:33:49,149 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:33:49,150 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-09-04 16:33:49,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0420262a/ec29e2fb217149c980e0c0fd5c06f65c/FLAGcbd0b382e [2020-09-04 16:33:49,865 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:33:49,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-09-04 16:33:49,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0420262a/ec29e2fb217149c980e0c0fd5c06f65c/FLAGcbd0b382e [2020-09-04 16:33:50,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0420262a/ec29e2fb217149c980e0c0fd5c06f65c [2020-09-04 16:33:50,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:33:50,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:33:50,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:33:50,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:33:50,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:33:50,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68901205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50, skipping insertion in model container [2020-09-04 16:33:50,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:33:50,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:33:50,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:33:50,553 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:33:50,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:33:50,599 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:33:50,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50 WrapperNode [2020-09-04 16:33:50,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:33:50,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:33:50,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:33:50,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:33:50,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (1/1) ... [2020-09-04 16:33:50,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:33:50,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:33:50,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:33:50,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:33:50,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:33:50,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:33:50,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:33:50,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:33:50,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:33:50,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 16:33:50,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:33:50,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-04 16:33:50,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:33:50,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:33:50,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:33:51,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:33:51,130 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 16:33:51,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:33:51 BoogieIcfgContainer [2020-09-04 16:33:51,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:33:51,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:33:51,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:33:51,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:33:51,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:33:50" (1/3) ... [2020-09-04 16:33:51,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32af975b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:33:51, skipping insertion in model container [2020-09-04 16:33:51,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:50" (2/3) ... [2020-09-04 16:33:51,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32af975b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:33:51, skipping insertion in model container [2020-09-04 16:33:51,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:33:51" (3/3) ... [2020-09-04 16:33:51,174 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-09-04 16:33:51,199 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:33:51,227 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:33:51,246 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:33:51,272 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:33:51,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:33:51,273 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:33:51,273 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:33:51,273 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:33:51,273 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:33:51,273 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:33:51,273 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:33:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-09-04 16:33:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 16:33:51,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:51,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:33:51,304 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash -936940309, now seen corresponding path program 1 times [2020-09-04 16:33:51,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:51,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921351951] [2020-09-04 16:33:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:51,395 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:51,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:51,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921351951] [2020-09-04 16:33:51,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:51,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:51,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509460489] [2020-09-04 16:33:51,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:51,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:51,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:51,538 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-09-04 16:33:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:51,677 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-09-04 16:33:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:51,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-04 16:33:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:51,696 INFO L225 Difference]: With dead ends: 110 [2020-09-04 16:33:51,697 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 16:33:51,702 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 [2020-09-04 16:33:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 16:33:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 16:33:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 16:33:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-09-04 16:33:51,766 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 15 [2020-09-04 16:33:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:51,767 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-09-04 16:33:51,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-09-04 16:33:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 16:33:51,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:51,769 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] [2020-09-04 16:33:51,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:33:51,770 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:51,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:51,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1261763386, now seen corresponding path program 1 times [2020-09-04 16:33:51,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:51,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418146982] [2020-09-04 16:33:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:51,802 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:51,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:51,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418146982] [2020-09-04 16:33:51,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:51,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:51,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307675425] [2020-09-04 16:33:51,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:51,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:51,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:51,852 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 3 states. [2020-09-04 16:33:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:51,946 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-09-04 16:33:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:51,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 16:33:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:51,949 INFO L225 Difference]: With dead ends: 134 [2020-09-04 16:33:51,949 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 16:33:51,951 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 [2020-09-04 16:33:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 16:33:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-09-04 16:33:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-04 16:33:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-09-04 16:33:51,970 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 22 [2020-09-04 16:33:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:51,971 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-09-04 16:33:51,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-09-04 16:33:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 16:33:51,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:51,973 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] [2020-09-04 16:33:51,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:33:51,974 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:51,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1258903450, now seen corresponding path program 1 times [2020-09-04 16:33:51,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:51,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240605738] [2020-09-04 16:33:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:51,981 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:52,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:52,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240605738] [2020-09-04 16:33:52,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:52,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:52,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847426298] [2020-09-04 16:33:52,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:52,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:52,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:52,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:52,020 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 3 states. [2020-09-04 16:33:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:52,103 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-09-04 16:33:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:52,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 16:33:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:52,106 INFO L225 Difference]: With dead ends: 140 [2020-09-04 16:33:52,106 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 16:33:52,107 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 [2020-09-04 16:33:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 16:33:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-09-04 16:33:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-04 16:33:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-09-04 16:33:52,145 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 22 [2020-09-04 16:33:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:52,149 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-09-04 16:33:52,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-09-04 16:33:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 16:33:52,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:52,151 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] [2020-09-04 16:33:52,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:33:52,154 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash 122238776, now seen corresponding path program 1 times [2020-09-04 16:33:52,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:52,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302991198] [2020-09-04 16:33:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:52,169 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:52,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:52,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302991198] [2020-09-04 16:33:52,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:52,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:52,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220437256] [2020-09-04 16:33:52,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:52,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:52,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:52,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:52,271 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 3 states. [2020-09-04 16:33:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:52,366 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2020-09-04 16:33:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:52,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-04 16:33:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:52,370 INFO L225 Difference]: With dead ends: 200 [2020-09-04 16:33:52,370 INFO L226 Difference]: Without dead ends: 136 [2020-09-04 16:33:52,371 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 [2020-09-04 16:33:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-04 16:33:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-09-04 16:33:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-04 16:33:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2020-09-04 16:33:52,397 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 30 [2020-09-04 16:33:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:52,398 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2020-09-04 16:33:52,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2020-09-04 16:33:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 16:33:52,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:52,400 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] [2020-09-04 16:33:52,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:33:52,401 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1207592178, now seen corresponding path program 1 times [2020-09-04 16:33:52,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:52,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332277339] [2020-09-04 16:33:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:52,409 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:52,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:52,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332277339] [2020-09-04 16:33:52,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:52,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:52,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292650206] [2020-09-04 16:33:52,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:52,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:52,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:52,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:52,452 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 3 states. [2020-09-04 16:33:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:52,531 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-09-04 16:33:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:52,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-09-04 16:33:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:52,534 INFO L225 Difference]: With dead ends: 248 [2020-09-04 16:33:52,534 INFO L226 Difference]: Without dead ends: 103 [2020-09-04 16:33:52,535 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 [2020-09-04 16:33:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-04 16:33:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-09-04 16:33:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-04 16:33:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-09-04 16:33:52,552 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 34 [2020-09-04 16:33:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:52,553 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-09-04 16:33:52,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-09-04 16:33:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 16:33:52,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:52,555 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] [2020-09-04 16:33:52,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:33:52,556 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:52,557 INFO L82 PathProgramCache]: Analyzing trace with hash 340924863, now seen corresponding path program 1 times [2020-09-04 16:33:52,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:52,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419035613] [2020-09-04 16:33:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:52,563 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:52,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:52,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419035613] [2020-09-04 16:33:52,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:52,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:52,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401888463] [2020-09-04 16:33:52,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:52,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:52,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:52,633 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 3 states. [2020-09-04 16:33:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:52,664 INFO L93 Difference]: Finished difference Result 157 states and 180 transitions. [2020-09-04 16:33:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:52,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-09-04 16:33:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:52,667 INFO L225 Difference]: With dead ends: 157 [2020-09-04 16:33:52,667 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 16:33:52,670 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 [2020-09-04 16:33:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 16:33:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 16:33:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 16:33:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 16:33:52,674 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-09-04 16:33:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:52,674 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 16:33:52,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 16:33:52,675 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 16:33:52,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:33:52,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 16:33:53,389 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 16:33:53,389 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 16:33:53,389 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 16:33:53,390 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 16:33:53,390 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 16:33:53,390 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 16:33:53,390 INFO L264 CegarLoopResult]: At program point L93(line 93) the Hoare annotation is: false [2020-09-04 16:33:53,390 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 8 140) the Hoare annotation is: true [2020-09-04 16:33:53,391 INFO L264 CegarLoopResult]: At program point L77-1(lines 53 106) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and .cse0 (not (= main_~s__hit~0 0))) (and .cse0 (<= main_~blastFlag~0 2)))) [2020-09-04 16:33:53,391 INFO L271 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-09-04 16:33:53,391 INFO L264 CegarLoopResult]: At program point L69(lines 69 73) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,391 INFO L264 CegarLoopResult]: At program point L61(line 61) the Hoare annotation is: (or (and (<= main_~blastFlag~0 2) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 0)) [2020-09-04 16:33:53,391 INFO L264 CegarLoopResult]: At program point L78(line 78) the Hoare annotation is: (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) [2020-09-04 16:33:53,392 INFO L264 CegarLoopResult]: At program point L45(lines 45 110) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 16:33:53,392 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-09-04 16:33:53,392 INFO L271 CegarLoopResult]: At program point L136(lines 8 140) the Hoare annotation is: true [2020-09-04 16:33:53,392 INFO L264 CegarLoopResult]: At program point L70(line 70) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,392 INFO L264 CegarLoopResult]: At program point L95(lines 95 97) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-09-04 16:33:53,393 INFO L264 CegarLoopResult]: At program point L29(lines 29 124) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 16:33:53,393 INFO L264 CegarLoopResult]: At program point L46(lines 45 110) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and .cse0 (<= main_~blastFlag~0 2)) (and .cse0 (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))))) [2020-09-04 16:33:53,393 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 8 140) the Hoare annotation is: true [2020-09-04 16:33:53,394 INFO L264 CegarLoopResult]: At program point L96(lines 8 140) the Hoare annotation is: false [2020-09-04 16:33:53,394 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) the Hoare annotation is: false [2020-09-04 16:33:53,394 INFO L264 CegarLoopResult]: At program point L63(line 63) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,394 INFO L264 CegarLoopResult]: At program point L30(lines 29 124) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,395 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 140) the Hoare annotation is: true [2020-09-04 16:33:53,395 INFO L264 CegarLoopResult]: At program point L88-1(lines 53 106) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-09-04 16:33:53,395 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 16:33:53,395 INFO L264 CegarLoopResult]: At program point L72(line 72) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,395 INFO L264 CegarLoopResult]: At program point L89(line 89) the Hoare annotation is: (and (<= main_~blastFlag~0 2) (<= 8656 main_~s__state~0)) [2020-09-04 16:33:53,397 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-09-04 16:33:53,397 INFO L264 CegarLoopResult]: At program point L139(line 139) the Hoare annotation is: false [2020-09-04 16:33:53,397 INFO L264 CegarLoopResult]: At program point L24(lines 24 127) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 16:33:53,398 INFO L264 CegarLoopResult]: At program point L57-1(lines 53 106) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,398 INFO L264 CegarLoopResult]: At program point L49(lines 49 108) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 16:33:53,398 INFO L264 CegarLoopResult]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 16:33:53,398 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (<= main_~blastFlag~0 0) [2020-09-04 16:33:53,398 INFO L264 CegarLoopResult]: At program point L25(lines 24 127) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,399 INFO L264 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 2)) [2020-09-04 16:33:53,399 INFO L264 CegarLoopResult]: At program point L50(lines 49 108) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0)) .cse0) (and (<= main_~blastFlag~0 2) .cse0))) [2020-09-04 16:33:53,399 INFO L264 CegarLoopResult]: At program point L100(line 100) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and (<= main_~blastFlag~0 0) .cse0) (and (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0)) .cse0))) [2020-09-04 16:33:53,399 INFO L264 CegarLoopResult]: At program point L92-1(lines 53 106) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-09-04 16:33:53,400 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 16:33:53,400 INFO L271 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: true [2020-09-04 16:33:53,400 INFO L271 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: true [2020-09-04 16:33:53,400 INFO L271 CegarLoopResult]: At program point L10-2(line 10) the Hoare annotation is: true [2020-09-04 16:33:53,400 INFO L264 CegarLoopResult]: At program point L68(line 68) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,400 INFO L264 CegarLoopResult]: At program point L68-1(line 68) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 16:33:53,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:33:53 BoogieIcfgContainer [2020-09-04 16:33:53,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:33:53,444 INFO L168 Benchmark]: Toolchain (without parser) took 3223.64 ms. Allocated memory was 144.7 MB in the beginning and 233.3 MB in the end (delta: 88.6 MB). Free memory was 101.9 MB in the beginning and 113.2 MB in the end (delta: -11.3 MB). Peak memory consumption was 77.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:53,444 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:33:53,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.34 ms. Allocated memory is still 144.7 MB. Free memory was 101.7 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:53,452 INFO L168 Benchmark]: Boogie Preprocessor took 153.70 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.4 MB in the beginning and 180.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:53,454 INFO L168 Benchmark]: RCFGBuilder took 389.87 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 164.4 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:53,455 INFO L168 Benchmark]: TraceAbstraction took 2284.75 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 164.4 MB in the beginning and 113.2 MB in the end (delta: 51.2 MB). Peak memory consumption was 82.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:53,472 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 382.34 ms. Allocated memory is still 144.7 MB. Free memory was 101.7 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.70 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.4 MB in the beginning and 180.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 389.87 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 164.4 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2284.75 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 164.4 MB in the beginning and 113.2 MB in the end (delta: 51.2 MB). Peak memory consumption was 82.1 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: ((blastFlag <= 3 && !(s__hit == 0)) && 8656 <= s__state) || (blastFlag <= 2 && 8656 <= s__state) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((8640 <= s__state && blastFlag <= 3) && !(s__hit == 0)) || blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (8640 <= s__state && blastFlag <= 2) || ((8640 <= s__state && blastFlag <= 3) && !(s__hit == 0)) - 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: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, 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, 0.2s 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...