/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:14:39,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:14:39,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:14:39,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:14:39,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:14:39,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:14:39,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:14:39,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:14:39,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:14:39,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:14:39,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:14:39,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:14:39,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:14:39,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:14:39,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:14:39,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:14:39,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:14:39,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:14:39,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:14:39,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:14:39,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:14:39,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:14:39,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:14:39,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:14:39,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:14:39,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:14:39,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:14:39,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:14:39,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:14:40,009 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:14:40,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:14:40,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:14:40,015 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:14:40,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:14:40,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:14:40,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:14:40,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:14:40,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:14:40,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:14:40,018 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:14:40,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:14:40,019 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:14:40,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:14:40,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:14:40,020 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:14:40,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:14:40,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:14:40,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:14:40,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:14:40,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:14:40,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:14:40,022 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:14:40,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:14:40,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:14:40,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:14:40,477 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:14:40,479 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:14:40,481 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-22 23:14:40,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d95c989/9b405e0105474149b5a6e327d2520d19/FLAG77ef51e36 [2020-08-22 23:14:41,284 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:14:41,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-22 23:14:41,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d95c989/9b405e0105474149b5a6e327d2520d19/FLAG77ef51e36 [2020-08-22 23:14:41,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d95c989/9b405e0105474149b5a6e327d2520d19 [2020-08-22 23:14:41,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:14:41,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:14:41,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:14:41,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:14:41,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:14:41,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:41,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@661ae97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41, skipping insertion in model container [2020-08-22 23:14:41,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:41,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:14:41,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:14:41,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:14:41,923 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:14:41,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:14:41,969 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:14:41,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41 WrapperNode [2020-08-22 23:14:41,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:14:41,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:14:41,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:14:41,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:14:41,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:41,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:42,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:42,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:42,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:42,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:42,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (1/1) ... [2020-08-22 23:14:42,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:14:42,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:14:42,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:14:42,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:14:42,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (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 [2020-08-22 23:14:42,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:14:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:14:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:14:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:14:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:14:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:14:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:14:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:14:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:14:42,558 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:14:42,559 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 23:14:42,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:14:42 BoogieIcfgContainer [2020-08-22 23:14:42,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:14:42,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:14:42,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:14:42,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:14:42,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:14:41" (1/3) ... [2020-08-22 23:14:42,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba25088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:14:42, skipping insertion in model container [2020-08-22 23:14:42,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:41" (2/3) ... [2020-08-22 23:14:42,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba25088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:14:42, skipping insertion in model container [2020-08-22 23:14:42,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:14:42" (3/3) ... [2020-08-22 23:14:42,598 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-08-22 23:14:42,636 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:14:42,651 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:14:42,694 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:14:42,727 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:14:42,727 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:14:42,728 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:14:42,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:14:42,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:14:42,728 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:14:42,728 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:14:42,729 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:14:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-08-22 23:14:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 23:14:42,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:42,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:42,767 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1562147583, now seen corresponding path program 1 times [2020-08-22 23:14:42,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:42,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859893722] [2020-08-22 23:14:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:43,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:43,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859893722] [2020-08-22 23:14:43,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:14:43,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:14:43,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868191229] [2020-08-22 23:14:43,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:14:43,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:43,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:14:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:14:43,139 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-08-22 23:14:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:43,245 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2020-08-22 23:14:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:14:43,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 23:14:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:43,261 INFO L225 Difference]: With dead ends: 105 [2020-08-22 23:14:43,262 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 23:14:43,268 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 [2020-08-22 23:14:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 23:14:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-08-22 23:14:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:14:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-22 23:14:43,330 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2020-08-22 23:14:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:43,331 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-22 23:14:43,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:14:43,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-22 23:14:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 23:14:43,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:43,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:43,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:14:43,335 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:43,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:43,336 INFO L82 PathProgramCache]: Analyzing trace with hash 42061886, now seen corresponding path program 1 times [2020-08-22 23:14:43,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:43,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588140130] [2020-08-22 23:14:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:43,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:43,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588140130] [2020-08-22 23:14:43,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:43,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:14:43,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728626505] [2020-08-22 23:14:43,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:14:43,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:43,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:14:43,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:14:43,536 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-08-22 23:14:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:43,651 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2020-08-22 23:14:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:14:43,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 23:14:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:43,655 INFO L225 Difference]: With dead ends: 97 [2020-08-22 23:14:43,655 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 23:14:43,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:14:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 23:14:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2020-08-22 23:14:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 23:14:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-22 23:14:43,673 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 27 [2020-08-22 23:14:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:43,674 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-22 23:14:43,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:14:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-22 23:14:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 23:14:43,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:43,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:43,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:14:43,677 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:43,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2023869189, now seen corresponding path program 2 times [2020-08-22 23:14:43,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:43,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850655654] [2020-08-22 23:14:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:43,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:43,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850655654] [2020-08-22 23:14:43,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:43,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:14:43,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696491352] [2020-08-22 23:14:43,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:14:43,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:14:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:14:43,912 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-08-22 23:14:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:44,116 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-08-22 23:14:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:14:44,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-22 23:14:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:44,119 INFO L225 Difference]: With dead ends: 105 [2020-08-22 23:14:44,119 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 23:14:44,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:14:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 23:14:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-08-22 23:14:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 23:14:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-22 23:14:44,136 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2020-08-22 23:14:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:44,137 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-22 23:14:44,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:14:44,138 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-22 23:14:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 23:14:44,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:44,140 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:44,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:14:44,141 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash -909118664, now seen corresponding path program 3 times [2020-08-22 23:14:44,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:44,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210784332] [2020-08-22 23:14:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:44,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210784332] [2020-08-22 23:14:44,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:44,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:14:44,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939540517] [2020-08-22 23:14:44,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:14:44,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:44,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:14:44,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:14:44,388 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-08-22 23:14:44,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:44,630 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-08-22 23:14:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:14:44,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-22 23:14:44,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:44,634 INFO L225 Difference]: With dead ends: 113 [2020-08-22 23:14:44,635 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 23:14:44,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:14:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 23:14:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-08-22 23:14:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 23:14:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-08-22 23:14:44,657 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2020-08-22 23:14:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:44,658 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-08-22 23:14:44,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:14:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-08-22 23:14:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 23:14:44,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:44,662 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:44,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:14:44,663 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash -460436747, now seen corresponding path program 4 times [2020-08-22 23:14:44,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:44,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595719239] [2020-08-22 23:14:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:44,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595719239] [2020-08-22 23:14:44,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:44,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:14:44,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716905504] [2020-08-22 23:14:44,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:14:44,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:14:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:14:44,944 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2020-08-22 23:14:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:45,211 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2020-08-22 23:14:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:14:45,212 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-08-22 23:14:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:45,214 INFO L225 Difference]: With dead ends: 121 [2020-08-22 23:14:45,214 INFO L226 Difference]: Without dead ends: 77 [2020-08-22 23:14:45,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:14:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-22 23:14:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-08-22 23:14:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 23:14:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-08-22 23:14:45,226 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 39 [2020-08-22 23:14:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:45,227 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-08-22 23:14:45,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:14:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-08-22 23:14:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 23:14:45,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:45,229 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:45,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:14:45,229 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:45,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1152416818, now seen corresponding path program 5 times [2020-08-22 23:14:45,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:45,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229866474] [2020-08-22 23:14:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:45,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229866474] [2020-08-22 23:14:45,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:45,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:14:45,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245070058] [2020-08-22 23:14:45,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:14:45,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:45,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:14:45,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:14:45,554 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 13 states. [2020-08-22 23:14:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:45,979 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-08-22 23:14:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:14:45,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-08-22 23:14:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:45,982 INFO L225 Difference]: With dead ends: 129 [2020-08-22 23:14:45,982 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 23:14:45,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:14:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 23:14:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-08-22 23:14:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 23:14:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-08-22 23:14:45,996 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 43 [2020-08-22 23:14:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:45,996 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-08-22 23:14:45,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:14:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-08-22 23:14:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 23:14:45,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:45,998 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:45,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:14:45,999 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2041431791, now seen corresponding path program 6 times [2020-08-22 23:14:46,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:46,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367237330] [2020-08-22 23:14:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:46,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:46,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367237330] [2020-08-22 23:14:46,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:46,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:14:46,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980147351] [2020-08-22 23:14:46,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:14:46,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:46,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:14:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:14:46,280 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 15 states. [2020-08-22 23:14:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:46,761 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2020-08-22 23:14:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:14:46,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-08-22 23:14:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:46,764 INFO L225 Difference]: With dead ends: 137 [2020-08-22 23:14:46,764 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 23:14:46,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:14:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 23:14:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2020-08-22 23:14:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 23:14:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-08-22 23:14:46,776 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 47 [2020-08-22 23:14:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:46,777 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-08-22 23:14:46,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:14:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-08-22 23:14:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 23:14:46,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:46,778 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:46,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:14:46,779 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash 90008364, now seen corresponding path program 7 times [2020-08-22 23:14:46,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:46,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809636397] [2020-08-22 23:14:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:47,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:47,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809636397] [2020-08-22 23:14:47,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:47,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:14:47,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379379680] [2020-08-22 23:14:47,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:14:47,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:14:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:14:47,167 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 17 states. [2020-08-22 23:14:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:47,689 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2020-08-22 23:14:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 23:14:47,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-08-22 23:14:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:47,692 INFO L225 Difference]: With dead ends: 145 [2020-08-22 23:14:47,692 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 23:14:47,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:14:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 23:14:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2020-08-22 23:14:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 23:14:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-22 23:14:47,711 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 51 [2020-08-22 23:14:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:47,711 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-22 23:14:47,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:14:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-22 23:14:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 23:14:47,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:47,713 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:47,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:14:47,716 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:47,717 INFO L82 PathProgramCache]: Analyzing trace with hash 737585385, now seen corresponding path program 8 times [2020-08-22 23:14:47,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:47,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195671933] [2020-08-22 23:14:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:48,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:48,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195671933] [2020-08-22 23:14:48,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:48,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 23:14:48,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983160399] [2020-08-22 23:14:48,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:14:48,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:14:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:14:48,109 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 19 states. [2020-08-22 23:14:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:48,832 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-08-22 23:14:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 23:14:48,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-22 23:14:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:48,835 INFO L225 Difference]: With dead ends: 153 [2020-08-22 23:14:48,835 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 23:14:48,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:14:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 23:14:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-08-22 23:14:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 23:14:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-08-22 23:14:48,859 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 55 [2020-08-22 23:14:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:48,860 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-08-22 23:14:48,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:14:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-08-22 23:14:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 23:14:48,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:48,862 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:48,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:14:48,863 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:48,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:48,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1005535194, now seen corresponding path program 9 times [2020-08-22 23:14:48,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:48,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985757152] [2020-08-22 23:14:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:49,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:49,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985757152] [2020-08-22 23:14:49,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:49,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 23:14:49,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380773919] [2020-08-22 23:14:49,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 23:14:49,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:49,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 23:14:49,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:14:49,302 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 21 states. [2020-08-22 23:14:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:50,136 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2020-08-22 23:14:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 23:14:50,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-08-22 23:14:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:50,139 INFO L225 Difference]: With dead ends: 161 [2020-08-22 23:14:50,139 INFO L226 Difference]: Without dead ends: 97 [2020-08-22 23:14:50,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:14:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-22 23:14:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2020-08-22 23:14:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 23:14:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-08-22 23:14:50,150 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 59 [2020-08-22 23:14:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:50,150 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-08-22 23:14:50,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 23:14:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-08-22 23:14:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 23:14:50,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:50,155 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:50,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:14:50,155 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:50,156 INFO L82 PathProgramCache]: Analyzing trace with hash 111341795, now seen corresponding path program 10 times [2020-08-22 23:14:50,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:50,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827236132] [2020-08-22 23:14:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:50,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:50,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827236132] [2020-08-22 23:14:50,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:50,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 23:14:50,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244448177] [2020-08-22 23:14:50,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 23:14:50,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:50,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 23:14:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:14:50,828 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 25 states. [2020-08-22 23:14:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:52,080 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2020-08-22 23:14:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 23:14:52,081 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-08-22 23:14:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:52,084 INFO L225 Difference]: With dead ends: 161 [2020-08-22 23:14:52,084 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:14:52,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 23:14:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:14:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:14:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:14:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:14:52,089 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2020-08-22 23:14:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:52,090 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:14:52,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 23:14:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:14:52,090 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:14:52,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:14:52,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:14:52,734 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2020-08-22 23:14:52,953 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-08-22 23:14:53,140 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:14:53,140 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:14:53,140 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:14:53,140 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:14:53,140 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:14:53,141 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:14:53,141 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 10 25) the Hoare annotation is: true [2020-08-22 23:14:53,141 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,142 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,142 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 23:14:53,142 INFO L264 CegarLoopResult]: At program point L19-4(line 19) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,142 INFO L264 CegarLoopResult]: At program point L19-5(line 19) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,143 INFO L264 CegarLoopResult]: At program point L19-6(lines 19 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,143 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,143 INFO L264 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2020-08-22 23:14:53,143 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 23:14:53,143 INFO L264 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2020-08-22 23:14:53,143 INFO L264 CegarLoopResult]: At program point L20-5(lines 20 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,144 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,144 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (or (and (<= 3 main_~v~0) (<= main_~v~0 3)) (and (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= main_~v~0 7) (<= 7 main_~v~0)) (and (<= main_~v~0 8) (<= 8 main_~v~0)) (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= 2 main_~v~0) (<= main_~v~0 2)) (and (<= 4 main_~v~0) (<= main_~v~0 4)) (and (<= main_~v~0 1) (<= 1 main_~v~0)) (and (<= main_~v~0 5) (<= 5 main_~v~0)) (and (<= 6 main_~v~0) (<= main_~v~0 6))) [2020-08-22 23:14:53,144 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (< 0 (+ (div main_~v~0 4294967296) 1)) (<= main_~v~0 0)) [2020-08-22 23:14:53,145 INFO L264 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (or (and (<= 4 |main_#t~post4|) (<= 4 main_~v~0) (<= |main_#t~post4| 4) (<= main_~v~0 4)) (and (<= |main_#t~post4| 6) (<= 6 main_~v~0) (<= 6 |main_#t~post4|) (<= main_~v~0 6)) (and (<= main_~v~0 7) (<= |main_#t~post4| 7) (<= 7 |main_#t~post4|) (<= 7 main_~v~0)) (and (<= 2 main_~v~0) (<= main_~v~0 2) (<= |main_#t~post4| 2) (<= 2 |main_#t~post4|)) (and (<= main_~v~0 8) (<= 8 main_~v~0) (<= 8 |main_#t~post4|) (<= |main_#t~post4| 8)) (and (<= main_~v~0 1) (<= 1 main_~v~0) (<= |main_#t~post4| 1) (<= 1 |main_#t~post4|)) (and (<= 5 |main_#t~post4|) (<= main_~v~0 5) (<= 5 main_~v~0) (<= |main_#t~post4| 5)) (and (<= |main_#t~post4| 0) (<= 0 |main_#t~post4|) (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= 3 main_~v~0) (<= main_~v~0 3) (<= 3 |main_#t~post4|) (<= |main_#t~post4| 3)) (and (<= 9 |main_#t~post4|) (<= |main_#t~post4| 9) (<= main_~v~0 9) (<= 9 main_~v~0))) [2020-08-22 23:14:53,145 INFO L264 CegarLoopResult]: At program point L21-5(line 21) the Hoare annotation is: (or (and (<= 8 |main_#t~post4|) (<= |main_#t~post4| 8) (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= 2 main_~v~0) (<= |main_#t~post4| 1) (<= main_~v~0 2) (<= 1 |main_#t~post4|)) (and (<= 3 main_~v~0) (<= main_~v~0 3) (<= |main_#t~post4| 2) (<= 2 |main_#t~post4|)) (and (<= 4 main_~v~0) (<= 3 |main_#t~post4|) (<= |main_#t~post4| 3) (<= main_~v~0 4)) (and (<= 5 |main_#t~post4|) (<= 6 main_~v~0) (<= |main_#t~post4| 5) (<= main_~v~0 6)) (and (<= main_~v~0 5) (<= 4 |main_#t~post4|) (<= 5 main_~v~0) (<= |main_#t~post4| 4)) (and (<= main_~v~0 1) (<= |main_#t~post4| 0) (<= 0 |main_#t~post4|) (<= 1 main_~v~0)) (and (<= |main_#t~post4| 6) (<= main_~v~0 7) (<= 6 |main_#t~post4|) (<= 7 main_~v~0)) (and (<= main_~v~0 8) (<= 8 main_~v~0) (<= |main_#t~post4| 7) (<= 7 |main_#t~post4|)) (and (<= 9 |main_#t~post4|) (<= |main_#t~post4| 9) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2))) [2020-08-22 23:14:53,145 INFO L264 CegarLoopResult]: At program point L21-6(line 21) the Hoare annotation is: (or (and (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= main_~v~0 8) (< 0 (+ (div main_~v~0 4294967296) 1)))) [2020-08-22 23:14:53,145 INFO L264 CegarLoopResult]: At program point L21-7(line 21) the Hoare annotation is: (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2020-08-22 23:14:53,146 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,146 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-08-22 23:14:53,146 INFO L264 CegarLoopResult]: At program point L17-4(line 17) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,146 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 10 25) the Hoare annotation is: true [2020-08-22 23:14:53,146 INFO L264 CegarLoopResult]: At program point L17-5(line 17) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,146 INFO L264 CegarLoopResult]: At program point L17-6(lines 17 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,146 INFO L271 CegarLoopResult]: At program point L17-7(lines 17 23) the Hoare annotation is: true [2020-08-22 23:14:53,147 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-08-22 23:14:53,147 INFO L264 CegarLoopResult]: At program point L22(lines 20 23) the Hoare annotation is: (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2020-08-22 23:14:53,147 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,147 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,147 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 23:14:53,147 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,147 INFO L264 CegarLoopResult]: At program point L18-5(line 18) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,147 INFO L264 CegarLoopResult]: At program point L18-6(lines 18 23) the Hoare annotation is: (or (and (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 0))) [2020-08-22 23:14:53,148 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 23:14:53,148 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2020-08-22 23:14:53,148 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2020-08-22 23:14:53,148 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2020-08-22 23:14:53,149 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2020-08-22 23:14:53,149 INFO L264 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2020-08-22 23:14:53,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:14:53 BoogieIcfgContainer [2020-08-22 23:14:53,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:14:53,181 INFO L168 Benchmark]: Toolchain (without parser) took 11536.52 ms. Allocated memory was 141.6 MB in the beginning and 306.2 MB in the end (delta: 164.6 MB). Free memory was 102.9 MB in the beginning and 124.0 MB in the end (delta: -21.1 MB). Peak memory consumption was 143.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:14:53,182 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 141.6 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:14:53,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.69 ms. Allocated memory is still 141.6 MB. Free memory was 102.7 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:14:53,184 INFO L168 Benchmark]: Boogie Preprocessor took 182.78 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 93.1 MB in the beginning and 182.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:14:53,185 INFO L168 Benchmark]: RCFGBuilder took 410.34 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 167.6 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:14:53,185 INFO L168 Benchmark]: TraceAbstraction took 10611.35 ms. Allocated memory was 203.4 MB in the beginning and 306.2 MB in the end (delta: 102.8 MB). Free memory was 166.9 MB in the beginning and 124.0 MB in the end (delta: 42.9 MB). Peak memory consumption was 145.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:14:53,189 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 141.6 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.69 ms. Allocated memory is still 141.6 MB. Free memory was 102.7 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 182.78 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 93.1 MB in the beginning and 182.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.34 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 167.6 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10611.35 ms. Allocated memory was 203.4 MB in the beginning and 306.2 MB in the end (delta: 102.8 MB). Free memory was 166.9 MB in the beginning and 124.0 MB in the end (delta: 42.9 MB). Peak memory consumption was 145.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 17]: Loop Invariant Derived loop invariant: (10 <= v && v / 4 <= 2) || (0 <= v && v <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (10 <= v && v / 4 <= 2) || (0 <= v && v <= 0) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (10 <= v && v / 4 <= 2) || (0 <= v && v <= 0) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((v <= 9 && 9 <= v) || (10 <= v && v / 4 <= 2)) || (v <= 8 && 0 < v / 4294967296 + 1) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (10 <= v && v / 4 <= 2) || (0 <= v && v <= 0) - ProcedureContractResult [Line: 10]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (cond + 2 <= 0 || (!(2 <= \old(cond)) && !(\old(cond) + 2 <= 0))) || 2 <= cond - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.3s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 527 SDtfs, 496 SDslu, 4924 SDs, 0 SdLazy, 2941 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=10, 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, 11 MinimizatonAttempts, 190 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 46 LocationsWithAnnotation, 112 PreInvPairs, 201 NumberOfFragments, 796 HoareAnnotationTreeSize, 112 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 46 FomulaSimplificationsInter, 240 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 462 ConstructedInterpolants, 0 QuantifiedInterpolants, 94784 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/715 InterpolantCoveringCapability, 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...