/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/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:59:00,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:59:00,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:59:00,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:59:00,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:59:00,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:59:00,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:59:00,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:59:00,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:59:00,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:59:00,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:59:00,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:59:00,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:59:00,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:59:00,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:59:00,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:59:00,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:59:00,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:59:00,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:59:00,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:59:00,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:59:00,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:59:00,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:59:00,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:59:00,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:59:00,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:59:00,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:59:00,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:59:00,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:59:00,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:59:00,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:59:00,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:59:00,208 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:59:00,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:59:00,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:59:00,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:59:00,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:59:00,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:59:00,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:59:00,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:59:00,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:59:00,210 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:59:00,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:59:00,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:59:00,211 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:59:00,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:59:00,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:59:00,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:59:00,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:59:00,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:59:00,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:59:00,215 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:59:00,477 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:59:00,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:59:00,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:59:00,493 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:59:00,493 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:59:00,494 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-07-07 13:59:00,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfac5a59e/c85641b498fe4c7ba533dee4c78bcfe0/FLAGe3b9c3f06 [2020-07-07 13:59:01,010 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:59:01,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-07-07 13:59:01,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfac5a59e/c85641b498fe4c7ba533dee4c78bcfe0/FLAGe3b9c3f06 [2020-07-07 13:59:01,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfac5a59e/c85641b498fe4c7ba533dee4c78bcfe0 [2020-07-07 13:59:01,403 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:59:01,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:59:01,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:01,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:59:01,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:59:01,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d8804d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01, skipping insertion in model container [2020-07-07 13:59:01,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:59:01,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:59:01,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:01,633 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:59:01,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:01,658 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:59:01,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01 WrapperNode [2020-07-07 13:59:01,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:01,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:59:01,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:59:01,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:59:01,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (1/1) ... [2020-07-07 13:59:01,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:59:01,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:59:01,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:59:01,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:59:01,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:59:01,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:59:01,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:59:01,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:59:01,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:59:01,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:59:01,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:59:01,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:59:01,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:59:01,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:59:01,995 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:59:01,995 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 13:59:02,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:02 BoogieIcfgContainer [2020-07-07 13:59:02,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:59:02,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:59:02,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:59:02,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:59:02,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:59:01" (1/3) ... [2020-07-07 13:59:02,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318a82e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:02, skipping insertion in model container [2020-07-07 13:59:02,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:01" (2/3) ... [2020-07-07 13:59:02,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318a82e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:02, skipping insertion in model container [2020-07-07 13:59:02,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:02" (3/3) ... [2020-07-07 13:59:02,009 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-07-07 13:59:02,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:59:02,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:59:02,042 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:59:02,065 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:59:02,065 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:59:02,066 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:59:02,066 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:59:02,066 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:59:02,066 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:59:02,066 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:59:02,066 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:59:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-07 13:59:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-07 13:59:02,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:02,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:02,093 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:02,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:02,100 INFO L82 PathProgramCache]: Analyzing trace with hash 129992897, now seen corresponding path program 1 times [2020-07-07 13:59:02,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:02,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960091848] [2020-07-07 13:59:02,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:02,221 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:02,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960091848] [2020-07-07 13:59:02,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:02,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 13:59:02,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772581195] [2020-07-07 13:59:02,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 13:59:02,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:02,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 13:59:02,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 13:59:02,243 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-07-07 13:59:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:02,265 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-07-07 13:59:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 13:59:02,266 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-07 13:59:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:02,272 INFO L225 Difference]: With dead ends: 34 [2020-07-07 13:59:02,273 INFO L226 Difference]: Without dead ends: 17 [2020-07-07 13:59:02,276 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 13:59:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-07 13:59:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-07 13:59:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-07 13:59:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-07 13:59:02,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2020-07-07 13:59:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:02,312 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-07 13:59:02,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 13:59:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-07 13:59:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-07 13:59:02,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:02,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:02,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:59:02,314 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash 121681208, now seen corresponding path program 1 times [2020-07-07 13:59:02,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:02,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533750602] [2020-07-07 13:59:02,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:02,368 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:02,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533750602] [2020-07-07 13:59:02,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:02,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:59:02,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538359628] [2020-07-07 13:59:02,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:59:02,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:02,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:59:02,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:59:02,371 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2020-07-07 13:59:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:02,422 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-07-07 13:59:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:59:02,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-07 13:59:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:02,424 INFO L225 Difference]: With dead ends: 26 [2020-07-07 13:59:02,424 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 13:59:02,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:59:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 13:59:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-07-07 13:59:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 13:59:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-07 13:59:02,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-07-07 13:59:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:02,453 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-07 13:59:02,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:59:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-07 13:59:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 13:59:02,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:02,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:02,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:59:02,458 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash -917865259, now seen corresponding path program 1 times [2020-07-07 13:59:02,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:02,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414297658] [2020-07-07 13:59:02,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 [2020-07-07 13:59:04,743 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-07-07 13:59:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:05,106 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:05,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414297658] [2020-07-07 13:59:05,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:05,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 13:59:05,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847811490] [2020-07-07 13:59:05,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 13:59:05,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 13:59:05,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:59:05,110 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2020-07-07 13:59:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:05,256 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-07 13:59:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:59:05,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-07-07 13:59:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:05,258 INFO L225 Difference]: With dead ends: 29 [2020-07-07 13:59:05,259 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 13:59:05,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:59:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 13:59:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-07 13:59:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 13:59:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-07 13:59:05,268 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-07-07 13:59:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:05,269 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-07 13:59:05,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 13:59:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-07 13:59:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 13:59:05,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:05,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:05,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:59:05,271 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:05,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2060587176, now seen corresponding path program 2 times [2020-07-07 13:59:05,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:05,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955017297] [2020-07-07 13:59:05,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.001s / 0.001s total Resizing node table from 19 to 37 [2020-07-07 13:59:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:07,840 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:07,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955017297] [2020-07-07 13:59:07,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:07,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 13:59:07,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315339139] [2020-07-07 13:59:07,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 13:59:07,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:07,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 13:59:07,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-07-07 13:59:07,847 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2020-07-07 13:59:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:07,987 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-07 13:59:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:59:07,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-07-07 13:59:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:07,989 INFO L225 Difference]: With dead ends: 34 [2020-07-07 13:59:07,989 INFO L226 Difference]: Without dead ends: 29 [2020-07-07 13:59:07,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-07 13:59:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-07 13:59:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-07-07 13:59:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 13:59:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-07-07 13:59:08,004 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-07-07 13:59:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:08,005 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-07-07 13:59:08,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 13:59:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-07-07 13:59:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 13:59:08,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:08,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:08,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:59:08,008 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:08,009 INFO L82 PathProgramCache]: Analyzing trace with hash 657233589, now seen corresponding path program 3 times [2020-07-07 13:59:08,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:08,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537167839] [2020-07-07 13:59:08,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 [2020-07-07 13:59:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:10,661 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:10,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537167839] [2020-07-07 13:59:10,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:10,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-07-07 13:59:10,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749530489] [2020-07-07 13:59:10,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 13:59:10,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 13:59:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:59:10,664 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-07-07 13:59:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:10,843 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-07-07 13:59:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 13:59:10,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-07-07 13:59:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:10,845 INFO L225 Difference]: With dead ends: 39 [2020-07-07 13:59:10,845 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 13:59:10,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-07-07 13:59:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 13:59:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-07 13:59:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 13:59:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-07 13:59:10,853 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-07-07 13:59:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:10,853 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-07 13:59:10,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 13:59:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-07 13:59:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 13:59:10,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:10,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:10,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:59:10,855 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1410268808, now seen corresponding path program 4 times [2020-07-07 13:59:10,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:10,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675893215] [2020-07-07 13:59:10,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 [2020-07-07 13:59:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:13,624 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:13,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675893215] [2020-07-07 13:59:13,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:13,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-07-07 13:59:13,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864902298] [2020-07-07 13:59:13,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 13:59:13,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:13,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 13:59:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-07-07 13:59:13,627 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 23 states. [2020-07-07 13:59:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:13,808 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-07-07 13:59:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 13:59:13,809 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-07-07 13:59:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:13,810 INFO L225 Difference]: With dead ends: 44 [2020-07-07 13:59:13,810 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 13:59:13,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2020-07-07 13:59:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 13:59:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-07 13:59:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 13:59:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-07-07 13:59:13,823 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-07-07 13:59:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:13,824 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-07-07 13:59:13,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 13:59:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-07-07 13:59:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 13:59:13,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:13,829 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:13,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:59:13,836 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:13,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1340090219, now seen corresponding path program 5 times [2020-07-07 13:59:13,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:13,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478769563] [2020-07-07 13:59:13,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 [2020-07-07 13:59:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:16,730 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:16,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478769563] [2020-07-07 13:59:16,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:16,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-07-07 13:59:16,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223714717] [2020-07-07 13:59:16,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 13:59:16,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 13:59:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-07-07 13:59:16,733 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 27 states. [2020-07-07 13:59:16,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:16,940 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-07-07 13:59:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 13:59:16,940 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 37 [2020-07-07 13:59:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:16,941 INFO L225 Difference]: With dead ends: 49 [2020-07-07 13:59:16,942 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 13:59:16,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-07-07 13:59:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 13:59:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-07 13:59:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 13:59:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-07-07 13:59:16,952 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-07-07 13:59:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:16,953 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-07-07 13:59:16,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 13:59:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-07-07 13:59:16,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 13:59:16,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:16,954 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:16,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:59:16,955 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:16,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:16,955 INFO L82 PathProgramCache]: Analyzing trace with hash 740027288, now seen corresponding path program 6 times [2020-07-07 13:59:16,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:16,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48237300] [2020-07-07 13:59:16,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 [2020-07-07 13:59:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:20,069 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:20,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48237300] [2020-07-07 13:59:20,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:20,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-07-07 13:59:20,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984171526] [2020-07-07 13:59:20,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-07 13:59:20,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:20,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-07 13:59:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2020-07-07 13:59:20,073 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 31 states. [2020-07-07 13:59:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:20,262 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-07-07 13:59:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 13:59:20,262 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-07-07 13:59:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:20,264 INFO L225 Difference]: With dead ends: 54 [2020-07-07 13:59:20,264 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 13:59:20,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 13:59:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 13:59:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-07 13:59:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 13:59:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-07-07 13:59:20,272 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-07-07 13:59:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:20,273 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-07-07 13:59:20,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-07 13:59:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-07-07 13:59:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-07 13:59:20,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:20,275 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:20,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:59:20,276 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:20,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1053966965, now seen corresponding path program 7 times [2020-07-07 13:59:20,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:20,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870391187] [2020-07-07 13:59:20,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 [2020-07-07 13:59:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:23,549 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:23,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870391187] [2020-07-07 13:59:23,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:23,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-07-07 13:59:23,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367432755] [2020-07-07 13:59:23,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-07 13:59:23,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:23,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-07 13:59:23,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 13:59:23,553 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 35 states. [2020-07-07 13:59:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:23,796 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-07-07 13:59:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-07 13:59:23,797 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 47 [2020-07-07 13:59:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:23,798 INFO L225 Difference]: With dead ends: 59 [2020-07-07 13:59:23,798 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 13:59:23,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 13:59:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 13:59:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-07 13:59:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 13:59:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-07-07 13:59:23,811 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-07-07 13:59:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:23,813 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-07-07 13:59:23,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-07 13:59:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-07-07 13:59:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-07 13:59:23,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:23,818 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:23,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:59:23,818 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:23,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:23,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1480544840, now seen corresponding path program 8 times [2020-07-07 13:59:23,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:23,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823818591] [2020-07-07 13:59:23,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 [2020-07-07 13:59:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:27,325 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:27,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823818591] [2020-07-07 13:59:27,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:27,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-07-07 13:59:27,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314560297] [2020-07-07 13:59:27,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-07 13:59:27,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-07 13:59:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 13:59:27,330 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 39 states. [2020-07-07 13:59:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:27,581 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-07-07 13:59:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 13:59:27,582 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 52 [2020-07-07 13:59:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:27,582 INFO L225 Difference]: With dead ends: 53 [2020-07-07 13:59:27,583 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 13:59:27,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 13:59:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 13:59:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 13:59:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 13:59:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 13:59:27,585 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-07-07 13:59:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:27,585 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 13:59:27,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-07 13:59:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 13:59:27,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 13:59:27,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:59:27,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 13:59:27,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 13:59:27,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 13:59:27,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 13:59:27,905 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 13:59:27,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 13:59:27,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 13:59:27,905 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-07 13:59:27,906 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 11 17) the Hoare annotation is: true [2020-07-07 13:59:27,906 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (let ((.cse1 (* 2 main_~i~0)) (.cse0 (+ main_~sn~0 2))) (and (<= .cse0 .cse1) (<= main_~i~0 8) (<= .cse1 .cse0))) [2020-07-07 13:59:27,906 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= main_~sn~0 0) (<= 0 main_~sn~0)) [2020-07-07 13:59:27,906 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 11 17) the Hoare annotation is: true [2020-07-07 13:59:27,906 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-07-07 13:59:27,906 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= main_~sn~0 .cse0) (<= main_~i~0 8) (<= .cse0 main_~sn~0))) [2020-07-07 13:59:27,906 INFO L264 CegarLoopResult]: At program point L13-4(line 13) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= main_~sn~0 .cse0) (<= main_~i~0 8) (<= .cse0 main_~sn~0) (= |main_#t~post0| main_~i~0))) [2020-07-07 13:59:27,906 INFO L264 CegarLoopResult]: At program point L13-5(line 13) the Hoare annotation is: (let ((.cse0 (* 2 |main_#t~post0|))) (and (<= main_~sn~0 .cse0) (= main_~i~0 (+ |main_#t~post0| 1)) (<= .cse0 main_~sn~0) (<= |main_#t~post0| 8))) [2020-07-07 13:59:27,906 INFO L264 CegarLoopResult]: At program point L13-6(lines 13 15) the Hoare annotation is: (let ((.cse1 (* 2 main_~i~0)) (.cse0 (+ main_~sn~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= main_~i~0 9))) [2020-07-07 13:59:27,907 INFO L264 CegarLoopResult]: At program point L13-7(lines 13 15) the Hoare annotation is: (let ((.cse1 (* 2 main_~i~0)) (.cse0 (+ main_~sn~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (< 8 main_~i~0) (<= main_~i~0 9))) [2020-07-07 13:59:27,907 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-07 13:59:27,907 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-07-07 13:59:27,907 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 13:59:27,907 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 13:59:27,907 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 13:59:27,907 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-07-07 13:59:27,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:59:27 BoogieIcfgContainer [2020-07-07 13:59:27,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:59:27,927 INFO L168 Benchmark]: Toolchain (without parser) took 26521.38 ms. Allocated memory was 145.8 MB in the beginning and 293.1 MB in the end (delta: 147.3 MB). Free memory was 104.2 MB in the beginning and 185.1 MB in the end (delta: -80.9 MB). Peak memory consumption was 66.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:27,928 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:59:27,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.32 ms. Allocated memory is still 145.8 MB. Free memory was 104.0 MB in the beginning and 94.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:27,929 INFO L168 Benchmark]: Boogie Preprocessor took 109.05 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 94.6 MB in the beginning and 183.6 MB in the end (delta: -89.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:27,930 INFO L168 Benchmark]: RCFGBuilder took 231.62 ms. Allocated memory is still 203.4 MB. Free memory was 183.6 MB in the beginning and 170.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:27,931 INFO L168 Benchmark]: TraceAbstraction took 25922.75 ms. Allocated memory was 203.4 MB in the beginning and 293.1 MB in the end (delta: 89.7 MB). Free memory was 170.9 MB in the beginning and 185.1 MB in the end (delta: -14.2 MB). Peak memory consumption was 75.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:27,935 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.32 ms. Allocated memory is still 145.8 MB. Free memory was 104.0 MB in the beginning and 94.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.05 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 94.6 MB in the beginning and 183.6 MB in the end (delta: -89.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 231.62 ms. Allocated memory is still 203.4 MB. Free memory was 183.6 MB in the beginning and 170.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25922.75 ms. Allocated memory was 203.4 MB in the beginning and 293.1 MB in the end (delta: 89.7 MB). Free memory was 170.9 MB in the beginning and 185.1 MB in the end (delta: -14.2 MB). Peak memory consumption was 75.5 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: 13]: Loop Invariant Derived loop invariant: (sn + 2 <= 2 * i && 2 * i <= sn + 2) && i <= 9 - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.5s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 112 SDslu, 1078 SDs, 0 SdLazy, 974 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 303 GetRequests, 58 SyntacticMatches, 42 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=9, 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, 10 MinimizatonAttempts, 10 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 77 PreInvPairs, 136 NumberOfFragments, 141 HoareAnnotationTreeSize, 77 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 23 FomulaSimplificationsInter, 622 FormulaSimplificationTreeSizeReductionInter, 0.2s 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...