/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:15:59,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:15:59,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:15:59,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:15:59,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:15:59,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:15:59,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:15:59,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:15:59,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:15:59,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:15:59,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:15:59,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:15:59,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:15:59,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:15:59,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:15:59,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:15:59,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:15:59,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:15:59,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:15:59,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:15:59,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:15:59,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:15:59,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:15:59,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:15:59,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:15:59,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:15:59,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:15:59,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:15:59,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:15:59,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:15:59,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:15:59,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:15:59,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:15:59,239 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:15:59,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:15:59,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:15:59,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:15:59,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:15:59,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:15:59,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:15:59,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:15:59,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:15:59,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:15:59,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:15:59,241 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:15:59,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:15:59,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:15:59,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:15:59,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:15:59,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:15:59,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:15:59,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:15:59,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:15:59,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:15:59,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:15:59,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:15:59,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:15:59,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:15:59,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:15:59,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:15:59,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:15:59,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:15:59,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:15:59,555 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:15:59,556 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-07-17 12:15:59,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1716ab9/e5bdc60d039b4800bd5ca77d722d9f5a/FLAG5e0119d4c [2020-07-17 12:16:00,104 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:16:00,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-07-17 12:16:00,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1716ab9/e5bdc60d039b4800bd5ca77d722d9f5a/FLAG5e0119d4c [2020-07-17 12:16:00,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1716ab9/e5bdc60d039b4800bd5ca77d722d9f5a [2020-07-17 12:16:00,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:16:00,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:16:00,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:00,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:16:00,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:16:00,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723da32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00, skipping insertion in model container [2020-07-17 12:16:00,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:16:00,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:16:00,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:00,665 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:16:00,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:00,695 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:16:00,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00 WrapperNode [2020-07-17 12:16:00,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:00,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:16:00,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:16:00,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:16:00,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (1/1) ... [2020-07-17 12:16:00,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:16:00,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:16:00,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:16:00,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:16:00,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (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 [2020-07-17 12:16:00,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:16:00,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:16:00,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:16:00,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:16:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:16:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:16:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:16:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:16:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:16:01,041 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:16:01,041 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:16:01,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:01 BoogieIcfgContainer [2020-07-17 12:16:01,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:16:01,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:16:01,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:16:01,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:16:01,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:16:00" (1/3) ... [2020-07-17 12:16:01,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa370d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:01, skipping insertion in model container [2020-07-17 12:16:01,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:00" (2/3) ... [2020-07-17 12:16:01,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa370d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:01, skipping insertion in model container [2020-07-17 12:16:01,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:01" (3/3) ... [2020-07-17 12:16:01,053 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-07-17 12:16:01,063 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:16:01,070 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:16:01,085 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:16:01,108 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:16:01,108 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:16:01,108 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:16:01,109 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:16:01,109 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:16:01,109 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:16:01,109 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:16:01,109 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:16:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-17 12:16:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:16:01,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:01,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:01,132 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:01,137 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-07-17 12:16:01,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:01,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82259452] [2020-07-17 12:16:01,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:01,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82259452] [2020-07-17 12:16:01,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:01,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 12:16:01,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474521373] [2020-07-17 12:16:01,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 12:16:01,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:01,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 12:16:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:16:01,259 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-07-17 12:16:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:01,276 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-17 12:16:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 12:16:01,278 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-17 12:16:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:01,284 INFO L225 Difference]: With dead ends: 29 [2020-07-17 12:16:01,285 INFO L226 Difference]: Without dead ends: 12 [2020-07-17 12:16:01,288 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 [2020-07-17 12:16:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-17 12:16:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-17 12:16:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-17 12:16:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-17 12:16:01,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-17 12:16:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:01,317 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-17 12:16:01,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 12:16:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-17 12:16:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:16:01,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:01,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:01,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:16:01,319 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash -15914692, now seen corresponding path program 1 times [2020-07-17 12:16:01,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:01,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87712931] [2020-07-17 12:16:01,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:01,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87712931] [2020-07-17 12:16:01,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:01,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:16:01,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339376661] [2020-07-17 12:16:01,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:16:01,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:01,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:16:01,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:16:01,373 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-07-17 12:16:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:01,437 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-17 12:16:01,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:16:01,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-17 12:16:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:01,439 INFO L225 Difference]: With dead ends: 19 [2020-07-17 12:16:01,439 INFO L226 Difference]: Without dead ends: 14 [2020-07-17 12:16:01,441 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 [2020-07-17 12:16:01,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-17 12:16:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-07-17 12:16:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-17 12:16:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-17 12:16:01,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-07-17 12:16:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:01,449 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-17 12:16:01,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:16:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-17 12:16:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-17 12:16:01,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:01,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:01,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:16:01,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:01,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1244203718, now seen corresponding path program 1 times [2020-07-17 12:16:01,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:01,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924508831] [2020-07-17 12:16:01,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:01,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924508831] [2020-07-17 12:16:01,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875920737] [2020-07-17 12:16:01,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-17 12:16:01,564 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:01,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:01,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-07-17 12:16:01,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441834613] [2020-07-17 12:16:01,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:16:01,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:16:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:16:01,595 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-07-17 12:16:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:01,661 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-17 12:16:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:16:01,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-17 12:16:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:01,664 INFO L225 Difference]: With dead ends: 21 [2020-07-17 12:16:01,664 INFO L226 Difference]: Without dead ends: 16 [2020-07-17 12:16:01,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:16:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-17 12:16:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-17 12:16:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-17 12:16:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-17 12:16:01,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-17 12:16:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:01,675 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-17 12:16:01,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:16:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-17 12:16:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-17 12:16:01,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:01,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:01,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 12:16:01,878 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:01,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash -513951304, now seen corresponding path program 2 times [2020-07-17 12:16:01,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:01,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642270138] [2020-07-17 12:16:01,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:01,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642270138] [2020-07-17 12:16:01,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354808983] [2020-07-17 12:16:01,928 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:01,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:01,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:01,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 12:16:01,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:01,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:01,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-17 12:16:01,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812988526] [2020-07-17 12:16:01,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:16:01,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:16:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:16:01,985 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-07-17 12:16:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:02,012 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-07-17 12:16:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:16:02,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-17 12:16:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:02,014 INFO L225 Difference]: With dead ends: 23 [2020-07-17 12:16:02,014 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 12:16:02,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:16:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 12:16:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-17 12:16:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-17 12:16:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-17 12:16:02,020 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-17 12:16:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:02,020 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-17 12:16:02,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:16:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-17 12:16:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 12:16:02,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:02,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:02,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:02,235 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:02,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1178949302, now seen corresponding path program 3 times [2020-07-17 12:16:02,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:02,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722007521] [2020-07-17 12:16:02,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:02,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722007521] [2020-07-17 12:16:02,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749654996] [2020-07-17 12:16:02,314 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:02,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 12:16:02,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:02,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-17 12:16:02,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:02,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:02,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-17 12:16:02,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251789244] [2020-07-17 12:16:02,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:16:02,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:16:02,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:16:02,361 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-07-17 12:16:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:02,398 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-07-17 12:16:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:16:02,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-17 12:16:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:02,400 INFO L225 Difference]: With dead ends: 25 [2020-07-17 12:16:02,400 INFO L226 Difference]: Without dead ends: 20 [2020-07-17 12:16:02,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:16:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-17 12:16:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-17 12:16:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-17 12:16:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-17 12:16:02,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-17 12:16:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:02,406 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-17 12:16:02,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:16:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-17 12:16:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 12:16:02,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:02,408 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:02,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:02,624 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash 263826484, now seen corresponding path program 4 times [2020-07-17 12:16:02,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:02,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173236018] [2020-07-17 12:16:02,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:02,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173236018] [2020-07-17 12:16:02,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203411035] [2020-07-17 12:16:02,711 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-17 12:16:02,735 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:16:02,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:02,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:16:02,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:02,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:02,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-17 12:16:02,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468533075] [2020-07-17 12:16:02,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:16:02,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:16:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:02,751 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-07-17 12:16:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:02,789 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-17 12:16:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:16:02,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-17 12:16:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:02,791 INFO L225 Difference]: With dead ends: 27 [2020-07-17 12:16:02,791 INFO L226 Difference]: Without dead ends: 22 [2020-07-17 12:16:02,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-17 12:16:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-17 12:16:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 12:16:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-17 12:16:02,797 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-07-17 12:16:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:02,798 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-17 12:16:02,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:16:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-17 12:16:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 12:16:02,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:02,799 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:03,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:03,012 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1299094066, now seen corresponding path program 5 times [2020-07-17 12:16:03,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:03,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311413781] [2020-07-17 12:16:03,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:03,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311413781] [2020-07-17 12:16:03,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062501325] [2020-07-17 12:16:03,133 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:03,158 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-17 12:16:03,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:03,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 12:16:03,161 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:03,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:03,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-07-17 12:16:03,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631917911] [2020-07-17 12:16:03,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:16:03,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:03,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:16:03,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:16:03,173 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-07-17 12:16:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:03,214 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-17 12:16:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:16:03,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-17 12:16:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:03,216 INFO L225 Difference]: With dead ends: 29 [2020-07-17 12:16:03,216 INFO L226 Difference]: Without dead ends: 24 [2020-07-17 12:16:03,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:16:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-17 12:16:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-17 12:16:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 12:16:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-17 12:16:03,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-07-17 12:16:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:03,222 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-17 12:16:03,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:16:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-17 12:16:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:16:03,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:03,223 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:03,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-17 12:16:03,436 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash -241172304, now seen corresponding path program 6 times [2020-07-17 12:16:03,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:03,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529304227] [2020-07-17 12:16:03,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:03,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529304227] [2020-07-17 12:16:03,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546822044] [2020-07-17 12:16:03,506 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:03,531 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-17 12:16:03,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:03,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:16:03,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:03,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:03,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-07-17 12:16:03,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23058287] [2020-07-17 12:16:03,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:16:03,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:16:03,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:16:03,551 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-07-17 12:16:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:03,594 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-17 12:16:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 12:16:03,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-07-17 12:16:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:03,595 INFO L225 Difference]: With dead ends: 31 [2020-07-17 12:16:03,596 INFO L226 Difference]: Without dead ends: 26 [2020-07-17 12:16:03,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:16:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-17 12:16:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-17 12:16:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 12:16:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-07-17 12:16:03,601 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-07-17 12:16:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:03,602 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-07-17 12:16:03,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:16:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-07-17 12:16:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:16:03,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:03,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:03,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:03,815 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:03,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1326563246, now seen corresponding path program 7 times [2020-07-17 12:16:03,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:03,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600066413] [2020-07-17 12:16:03,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:03,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600066413] [2020-07-17 12:16:03,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471125269] [2020-07-17 12:16:03,940 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:03,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-17 12:16:03,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:03,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:03,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-07-17 12:16:03,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972062405] [2020-07-17 12:16:03,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:16:03,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:03,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:16:03,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:16:03,983 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-07-17 12:16:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:04,020 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-07-17 12:16:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:16:04,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-17 12:16:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:04,022 INFO L225 Difference]: With dead ends: 32 [2020-07-17 12:16:04,022 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 12:16:04,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:16:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 12:16:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-17 12:16:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 12:16:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-17 12:16:04,027 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-07-17 12:16:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:04,027 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-17 12:16:04,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:16:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-17 12:16:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:16:04,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:04,028 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:04,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:04,240 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:04,241 INFO L82 PathProgramCache]: Analyzing trace with hash 386905900, now seen corresponding path program 8 times [2020-07-17 12:16:04,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:04,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007382097] [2020-07-17 12:16:04,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:04,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007382097] [2020-07-17 12:16:04,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417602424] [2020-07-17 12:16:04,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:04,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:04,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:04,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-17 12:16:04,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:04,520 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:16:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:04,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:04,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-17 12:16:04,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035053712] [2020-07-17 12:16:04,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 12:16:04,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:04,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 12:16:04,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-17 12:16:04,579 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-17 12:16:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:04,695 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-17 12:16:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 12:16:04,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-07-17 12:16:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:04,697 INFO L225 Difference]: With dead ends: 34 [2020-07-17 12:16:04,697 INFO L226 Difference]: Without dead ends: 29 [2020-07-17 12:16:04,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:16:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-17 12:16:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-17 12:16:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-17 12:16:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-17 12:16:04,707 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-07-17 12:16:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:04,709 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-17 12:16:04,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 12:16:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-17 12:16:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:16:04,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:04,710 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:04,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-17 12:16:04,912 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash -680671446, now seen corresponding path program 9 times [2020-07-17 12:16:04,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:04,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558369760] [2020-07-17 12:16:04,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:05,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558369760] [2020-07-17 12:16:05,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:05,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 12:16:05,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805628344] [2020-07-17 12:16:05,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:16:05,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:05,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:16:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:16:05,030 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2020-07-17 12:16:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:05,068 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-17 12:16:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:16:05,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-17 12:16:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:05,069 INFO L225 Difference]: With dead ends: 29 [2020-07-17 12:16:05,069 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:16:05,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:16:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:16:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:16:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:16:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:16:05,071 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-07-17 12:16:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:05,071 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:16:05,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:16:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:16:05,071 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:16:05,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 12:16:05,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:16:05,183 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:16:05,183 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:05,183 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:05,183 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:16:05,184 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:16:05,184 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:16:05,184 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-17 12:16:05,184 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-17 12:16:05,184 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-07-17 12:16:05,184 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-07-17 12:16:05,185 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= 8 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 8) (<= main_~i~0 5)) (and (<= main_~sn~0 0) (<= 0 main_~sn~0) (<= main_~i~0 1) (<= 1 main_~i~0)) (and (<= main_~i~0 3) (<= 4 main_~sn~0) (<= 3 main_~i~0) (<= main_~sn~0 4)) (and (<= main_~sn~0 6) (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0)) (and (<= main_~sn~0 16) (<= 9 main_~i~0) (<= 16 main_~sn~0)) (and (<= 14 main_~sn~0) (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14)) (and (<= main_~sn~0 10) (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 12 main_~sn~0) (<= main_~i~0 7) (<= 7 main_~i~0) (<= main_~sn~0 12))) [2020-07-17 12:16:05,185 INFO L264 CegarLoopResult]: At program point L13-4(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (<= 16 main_~sn~0)) [2020-07-17 12:16:05,185 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-17 12:16:05,185 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-17 12:16:05,185 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-17 12:16:05,186 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-17 12:16:05,186 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-17 12:16:05,186 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-17 12:16:05,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:16:05 BoogieIcfgContainer [2020-07-17 12:16:05,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:16:05,208 INFO L168 Benchmark]: Toolchain (without parser) took 4741.35 ms. Allocated memory was 144.7 MB in the beginning and 245.9 MB in the end (delta: 101.2 MB). Free memory was 102.9 MB in the beginning and 187.5 MB in the end (delta: -84.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:05,209 INFO L168 Benchmark]: CDTParser took 1.48 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 12:16:05,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.49 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:05,210 INFO L168 Benchmark]: Boogie Preprocessor took 28.74 ms. Allocated memory is still 144.7 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:05,211 INFO L168 Benchmark]: RCFGBuilder took 319.61 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 170.4 MB in the end (delta: -78.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:05,212 INFO L168 Benchmark]: TraceAbstraction took 4159.50 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 169.7 MB in the beginning and 187.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:05,216 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.48 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.49 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.74 ms. Allocated memory is still 144.7 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 319.61 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 170.4 MB in the end (delta: -78.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4159.50 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 169.7 MB in the beginning and 187.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 26.2 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: ((((((((((8 <= sn && 5 <= i) && sn <= 8) && i <= 5) || (((sn <= 0 && 0 <= sn) && i <= 1) && 1 <= i)) || (((i <= 3 && 4 <= sn) && 3 <= i) && sn <= 4)) || (((sn <= 6 && i <= 4) && 6 <= sn) && 4 <= i)) || ((sn <= 16 && 9 <= i) && 16 <= sn)) || (((14 <= sn && i <= 8) && 8 <= i) && sn <= 14)) || (((sn <= 10 && 10 <= sn) && 6 <= i) && i <= 6)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((12 <= sn && i <= 7) && 7 <= i) && sn <= 12) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.9s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 37 SDslu, 380 SDs, 0 SdLazy, 276 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 352 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 333 ConstructedInterpolants, 0 QuantifiedInterpolants, 17729 SizeOfPredicates, 8 NumberOfNonLiveVariables, 368 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 81/489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...