/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/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:01:58,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:01:58,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:01:58,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:01:58,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:01:58,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:01:58,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:01:58,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:01:59,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:01:59,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:01:59,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:01:59,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:01:59,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:01:59,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:01:59,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:01:59,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:01:59,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:01:59,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:01:59,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:01:59,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:01:59,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:01:59,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:01:59,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:01:59,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:01:59,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 14:01:59,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 14:01:59,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 14:01:59,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 14:01:59,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 14:01:59,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 14:01:59,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 14:01:59,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 14:01:59,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 14:01:59,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 14:01:59,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 14:01:59,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 14:01:59,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 14:01:59,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 14:01:59,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:01:59,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:01:59,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:01:59,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:01:59,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:01:59,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:01:59,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:01:59,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:01:59,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:01:59,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:01:59,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:01:59,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:01:59,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:01:59,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:01:59,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:01:59,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:01:59,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:01:59,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:01:59,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:01:59,078 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:01:59,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:01:59,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:01:59,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:01:59,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:01:59,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:01:59,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:01:59,079 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:01:59,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:01:59,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:01:59,381 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:01:59,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:01:59,385 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:01:59,386 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-07 14:01:59,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8ed9e84/1d68973f5cb042f3ab5f380a210c8233/FLAG33ae4b92c [2020-07-07 14:01:59,965 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:01:59,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-07 14:01:59,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8ed9e84/1d68973f5cb042f3ab5f380a210c8233/FLAG33ae4b92c [2020-07-07 14:02:00,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8ed9e84/1d68973f5cb042f3ab5f380a210c8233 [2020-07-07 14:02:00,362 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:02:00,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:02:00,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:02:00,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:02:00,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:02:00,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1773a34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00, skipping insertion in model container [2020-07-07 14:02:00,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:02:00,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:02:00,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:02:00,575 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:02:00,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:02:00,610 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:02:00,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00 WrapperNode [2020-07-07 14:02:00,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:02:00,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:02:00,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:02:00,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:02:00,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (1/1) ... [2020-07-07 14:02:00,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:02:00,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:02:00,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:02:00,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:02:00,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:02:00,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:02:00,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:02:00,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:02:00,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:02:00,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:02:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:02:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:02:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:02:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:02:00,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:02:00,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:02:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:02:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:02:01,029 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:02:01,030 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 14:02:01,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:02:01 BoogieIcfgContainer [2020-07-07 14:02:01,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:02:01,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:02:01,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:02:01,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:02:01,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:02:00" (1/3) ... [2020-07-07 14:02:01,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a2f33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:02:01, skipping insertion in model container [2020-07-07 14:02:01,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:00" (2/3) ... [2020-07-07 14:02:01,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a2f33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:02:01, skipping insertion in model container [2020-07-07 14:02:01,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:02:01" (3/3) ... [2020-07-07 14:02:01,056 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-07 14:02:01,081 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:02:01,092 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:02:01,132 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:02:01,169 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:02:01,169 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:02:01,170 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:02:01,170 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:02:01,170 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:02:01,170 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:02:01,176 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:02:01,176 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:02:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-07 14:02:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 14:02:01,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:01,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:01,203 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:01,209 INFO L82 PathProgramCache]: Analyzing trace with hash 789700725, now seen corresponding path program 1 times [2020-07-07 14:02:01,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:01,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131781686] [2020-07-07 14:02:01,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:01,357 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:01,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131781686] [2020-07-07 14:02:01,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:01,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 14:02:01,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469838542] [2020-07-07 14:02:01,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 14:02:01,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 14:02:01,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:02:01,388 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-07 14:02:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:01,415 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-07-07 14:02:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 14:02:01,416 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-07-07 14:02:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:01,426 INFO L225 Difference]: With dead ends: 44 [2020-07-07 14:02:01,427 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 14:02:01,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:02:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 14:02:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 14:02:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 14:02:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 14:02:01,478 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2020-07-07 14:02:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:01,479 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 14:02:01,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 14:02:01,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 14:02:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 14:02:01,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:01,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:01,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:02:01,482 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash 774924389, now seen corresponding path program 1 times [2020-07-07 14:02:01,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:01,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762478546] [2020-07-07 14:02:01,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:01,748 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:01,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762478546] [2020-07-07 14:02:01,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:01,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:02:01,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464325106] [2020-07-07 14:02:01,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:02:01,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:01,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:02:01,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:02:01,751 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-07-07 14:02:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:01,933 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-07-07 14:02:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 14:02:01,934 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-07 14:02:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:01,937 INFO L225 Difference]: With dead ends: 43 [2020-07-07 14:02:01,937 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 14:02:01,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:02:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 14:02:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2020-07-07 14:02:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 14:02:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-07 14:02:01,949 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2020-07-07 14:02:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:01,949 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-07 14:02:01,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:02:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-07 14:02:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 14:02:01,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:01,951 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] [2020-07-07 14:02:01,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:02:01,951 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash 775379929, now seen corresponding path program 1 times [2020-07-07 14:02:01,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:01,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352700274] [2020-07-07 14:02:01,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:02,270 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:02,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352700274] [2020-07-07 14:02:02,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:02,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:02:02,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698162900] [2020-07-07 14:02:02,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:02:02,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:02:02,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:02:02,273 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 10 states. [2020-07-07 14:02:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:02,600 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-07-07 14:02:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 14:02:02,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-07-07 14:02:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:02,602 INFO L225 Difference]: With dead ends: 48 [2020-07-07 14:02:02,602 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 14:02:02,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:02:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 14:02:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-07-07 14:02:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 14:02:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-07-07 14:02:02,611 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-07-07 14:02:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:02,612 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-07-07 14:02:02,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:02:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-07-07 14:02:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 14:02:02,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:02,613 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] [2020-07-07 14:02:02,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:02:02,614 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1973531292, now seen corresponding path program 1 times [2020-07-07 14:02:02,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:02,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926113842] [2020-07-07 14:02:02,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:02,738 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:02,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926113842] [2020-07-07 14:02:02,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:02,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 14:02:02,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779640440] [2020-07-07 14:02:02,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 14:02:02,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:02,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 14:02:02,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:02:02,741 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-07-07 14:02:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:02,821 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-07-07 14:02:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 14:02:02,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-07-07 14:02:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:02,823 INFO L225 Difference]: With dead ends: 45 [2020-07-07 14:02:02,824 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 14:02:02,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:02:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 14:02:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-07-07 14:02:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-07 14:02:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-07 14:02:02,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 24 [2020-07-07 14:02:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:02,833 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-07 14:02:02,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 14:02:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-07 14:02:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 14:02:02,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:02,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:02,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:02:02,836 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1316851483, now seen corresponding path program 2 times [2020-07-07 14:02:02,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:02,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372638426] [2020-07-07 14:02:02,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:02,975 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:02,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372638426] [2020-07-07 14:02:02,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:02,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 14:02:02,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201010110] [2020-07-07 14:02:02,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 14:02:02,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:02,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 14:02:02,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 14:02:02,978 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 3 states. [2020-07-07 14:02:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:03,008 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-07-07 14:02:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 14:02:03,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-07 14:02:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:03,009 INFO L225 Difference]: With dead ends: 60 [2020-07-07 14:02:03,009 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 14:02:03,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 14:02:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 14:02:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-07-07 14:02:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-07 14:02:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-07-07 14:02:03,019 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-07-07 14:02:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:03,019 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-07-07 14:02:03,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 14:02:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-07-07 14:02:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 14:02:03,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:03,021 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] [2020-07-07 14:02:03,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:02:03,021 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:03,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1981883390, now seen corresponding path program 1 times [2020-07-07 14:02:03,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:03,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292952074] [2020-07-07 14:02:03,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:03,429 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:03,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292952074] [2020-07-07 14:02:03,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:03,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:02:03,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42297864] [2020-07-07 14:02:03,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:02:03,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:03,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:02:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:02:03,435 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 14 states. [2020-07-07 14:02:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:03,936 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-07-07 14:02:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 14:02:03,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-07-07 14:02:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:03,938 INFO L225 Difference]: With dead ends: 56 [2020-07-07 14:02:03,939 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 14:02:03,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-07-07 14:02:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 14:02:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-07-07 14:02:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 14:02:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-07 14:02:03,964 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 29 [2020-07-07 14:02:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:03,965 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-07 14:02:03,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:02:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-07 14:02:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 14:02:03,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:03,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:03,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:02:03,971 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1157374763, now seen corresponding path program 2 times [2020-07-07 14:02:03,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:03,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336846084] [2020-07-07 14:02:03,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:04,105 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:04,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336846084] [2020-07-07 14:02:04,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:04,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:02:04,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179653960] [2020-07-07 14:02:04,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:02:04,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:04,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:02:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:02:04,108 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-07-07 14:02:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:04,166 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-07-07 14:02:04,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 14:02:04,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-07-07 14:02:04,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:04,168 INFO L225 Difference]: With dead ends: 62 [2020-07-07 14:02:04,168 INFO L226 Difference]: Without dead ends: 41 [2020-07-07 14:02:04,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:02:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-07 14:02:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-07-07 14:02:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 14:02:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-07 14:02:04,177 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 37 [2020-07-07 14:02:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:04,178 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-07 14:02:04,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:02:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-07 14:02:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 14:02:04,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:04,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:04,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:02:04,180 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash -282773191, now seen corresponding path program 3 times [2020-07-07 14:02:04,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:04,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831231384] [2020-07-07 14:02:04,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:04,350 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:04,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831231384] [2020-07-07 14:02:04,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:04,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:02:04,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603461523] [2020-07-07 14:02:04,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:02:04,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:04,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:02:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:02:04,352 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2020-07-07 14:02:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:04,836 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-07-07 14:02:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 14:02:04,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-07 14:02:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:04,838 INFO L225 Difference]: With dead ends: 65 [2020-07-07 14:02:04,839 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 14:02:04,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-07-07 14:02:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 14:02:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2020-07-07 14:02:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 14:02:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-07-07 14:02:04,855 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 37 [2020-07-07 14:02:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:04,856 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-07-07 14:02:04,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:02:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-07-07 14:02:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 14:02:04,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:04,857 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:04,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 14:02:04,858 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:04,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1065873285, now seen corresponding path program 4 times [2020-07-07 14:02:04,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:04,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913178321] [2020-07-07 14:02:04,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:05,335 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:05,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913178321] [2020-07-07 14:02:05,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:05,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 14:02:05,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309456559] [2020-07-07 14:02:05,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 14:02:05,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:05,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 14:02:05,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:02:05,337 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 18 states. [2020-07-07 14:02:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:05,883 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-07-07 14:02:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 14:02:05,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-07-07 14:02:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:05,884 INFO L225 Difference]: With dead ends: 71 [2020-07-07 14:02:05,885 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 14:02:05,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:02:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 14:02:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 14:02:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 14:02:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 14:02:05,888 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2020-07-07 14:02:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:05,888 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 14:02:05,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 14:02:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 14:02:05,889 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 14:02:05,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 14:02:05,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 14:02:06,609 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:02:06,609 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:02:06,609 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:02:06,609 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 14:02:06,610 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 14:02:06,610 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:02:06,610 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:02:06,610 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:02:06,610 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-07 14:02:06,611 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-07-07 14:02:06,611 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:02:06,611 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 25) the Hoare annotation is: true [2020-07-07 14:02:06,611 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-07-07 14:02:06,611 INFO L264 CegarLoopResult]: At program point L19(lines 19 21) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= main_~n~0 main_~k~0))) (and (<= (+ main_~i~0 2) (* 2 main_~k~0)) (<= main_~i~0 .cse0) (<= .cse0 main_~i~0)))) [2020-07-07 14:02:06,612 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~n~0) (<= main_~n~0 0) (< 0 (+ (div main_~i~0 2) 1))) [2020-07-07 14:02:06,612 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-07-07 14:02:06,612 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= main_~i~0 0) (< 0 (+ (div main_~i~0 2) 1))) [2020-07-07 14:02:06,612 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 25) the Hoare annotation is: true [2020-07-07 14:02:06,612 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 25) the Hoare annotation is: true [2020-07-07 14:02:06,612 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (and (<= (+ main_~i~0 2) (* 2 main_~k~0)) (<= main_~i~0 .cse0) (<= .cse0 main_~i~0))) [2020-07-07 14:02:06,613 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0)) (.cse1 (* 2 |main_#t~post2|))) (and (<= (+ main_~i~0 2) (* 2 main_~k~0)) (<= main_~i~0 .cse0) (<= .cse1 main_~i~0) (<= .cse0 main_~i~0) (<= main_~i~0 .cse1))) [2020-07-07 14:02:06,613 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~n~0) (<= main_~n~0 0) (< 0 (+ (div main_~i~0 2) 1))) [2020-07-07 14:02:06,613 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0)) (.cse1 (+ main_~i~0 2)) (.cse2 (* 2 |main_#t~post2|))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 2 main_~k~0)) (<= .cse2 main_~i~0) (<= main_~i~0 .cse2))) [2020-07-07 14:02:06,613 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~n~0) (<= main_~n~0 0) (< 0 (+ (div main_~i~0 2) 1))) [2020-07-07 14:02:06,613 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~n~0) (<= main_~n~0 0) (< 0 (+ (div main_~i~0 2) 1))) [2020-07-07 14:02:06,614 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 22) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 2 main_~k~0)))) (let ((.cse2 (+ main_~i~0 1))) (and (<= .cse0 .cse2) (<= .cse2 .cse0) (<= main_~n~0 main_~k~0))))) [2020-07-07 14:02:06,614 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~n~0) (<= main_~n~0 0) (< 0 (+ (div main_~i~0 2) 1))) [2020-07-07 14:02:06,614 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 1)) (.cse2 (+ |main_#t~post1| 1))) (and (<= .cse0 .cse1) (<= .cse2 .cse0) (<= .cse1 .cse0) (<= .cse0 .cse2) (<= main_~n~0 main_~k~0))) (let ((.cse3 (+ main_~i~0 2)) (.cse4 (+ |main_#t~post1| 2))) (and (<= .cse0 .cse3) (<= .cse0 .cse4) (<= .cse3 .cse0) (<= .cse3 (* 2 main_~k~0)) (<= .cse4 .cse0))))) [2020-07-07 14:02:06,614 INFO L264 CegarLoopResult]: At program point L18-5(line 18) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse2 (+ |main_#t~post1| 2)) (.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 (* 2 main_~k~0)) (<= .cse0 .cse2) (<= .cse2 .cse0) (<= .cse1 .cse0))) (let ((.cse3 (+ |main_#t~post1| 1))) (and (<= .cse3 .cse0) (<= main_~i~0 .cse0) (<= .cse0 main_~i~0) (<= .cse0 .cse3) (<= main_~n~0 main_~k~0))))) [2020-07-07 14:02:06,615 INFO L264 CegarLoopResult]: At program point L18-6(lines 18 22) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0))) (let ((.cse0 (<= main_~i~0 .cse1))) (or (and (<= main_~n~0 0) .cse0 (< 0 (+ (div main_~i~0 2) 1))) (and .cse0 (<= .cse1 main_~i~0) (<= main_~n~0 main_~k~0)) (let ((.cse2 (+ main_~i~0 1))) (and (<= .cse1 .cse2) (<= .cse2 (* 2 main_~k~0)) (<= .cse2 .cse1)))))) [2020-07-07 14:02:06,615 INFO L264 CegarLoopResult]: At program point L18-7(lines 18 22) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0))) (or (and .cse0 (<= main_~n~0 main_~k~0)) (and (<= 0 main_~n~0) (<= main_~n~0 0) .cse0))) [2020-07-07 14:02:06,615 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-07 14:02:06,615 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-07-07 14:02:06,615 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:02:06,616 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:02:06,616 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-07-07 14:02:06,616 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:02:06,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 02:02:06 BoogieIcfgContainer [2020-07-07 14:02:06,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 14:02:06,637 INFO L168 Benchmark]: Toolchain (without parser) took 6273.09 ms. Allocated memory was 145.2 MB in the beginning and 280.0 MB in the end (delta: 134.7 MB). Free memory was 103.3 MB in the beginning and 246.8 MB in the end (delta: -143.5 MB). Peak memory consumption was 140.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:02:06,638 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 145.2 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 14:02:06,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.46 ms. Allocated memory is still 145.2 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 14:02:06,640 INFO L168 Benchmark]: Boogie Preprocessor took 35.81 ms. Allocated memory is still 145.2 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:02:06,641 INFO L168 Benchmark]: RCFGBuilder took 389.99 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 92.2 MB in the beginning and 168.8 MB in the end (delta: -76.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 14:02:06,642 INFO L168 Benchmark]: TraceAbstraction took 5594.54 ms. Allocated memory was 202.9 MB in the beginning and 280.0 MB in the end (delta: 77.1 MB). Free memory was 168.8 MB in the beginning and 246.8 MB in the end (delta: -78.0 MB). Peak memory consumption was 148.1 MB. Max. memory is 7.1 GB. [2020-07-07 14:02:06,646 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 145.2 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.46 ms. Allocated memory is still 145.2 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.81 ms. Allocated memory is still 145.2 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 389.99 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 92.2 MB in the beginning and 168.8 MB in the end (delta: -76.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5594.54 ms. Allocated memory was 202.9 MB in the beginning and 280.0 MB in the end (delta: 77.1 MB). Free memory was 168.8 MB in the beginning and 246.8 MB in the end (delta: -78.0 MB). Peak memory consumption was 148.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 18]: Loop Invariant Derived loop invariant: (((n <= 0 && i <= 2 * n) && 0 < i / 2 + 1) || ((i <= 2 * n && 2 * n <= i) && n <= k)) || ((2 * n <= i + 1 && i + 1 <= 2 * k) && i + 1 <= 2 * n) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 190 SDtfs, 166 SDslu, 714 SDs, 0 SdLazy, 742 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=8, 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, 9 MinimizatonAttempts, 52 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 86 PreInvPairs, 139 NumberOfFragments, 485 HoareAnnotationTreeSize, 86 FomulaSimplifications, 1499 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 32 FomulaSimplificationsInter, 765 FormulaSimplificationTreeSizeReductionInter, 0.5s 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...