/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/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:29:38,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:29:38,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:29:38,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:29:38,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:29:38,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:29:38,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:29:38,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:29:38,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:29:38,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:29:38,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:29:38,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:29:38,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:29:38,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:29:38,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:29:38,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:29:38,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:29:38,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:29:38,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:29:38,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:29:38,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:29:38,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:29:38,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:29:38,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:29:38,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:29:38,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:29:38,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:29:38,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:29:38,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:29:38,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:29:38,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:29:38,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:29:38,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:29:38,214 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:29:38,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:29:38,214 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:29:38,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:29:38,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:29:38,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:29:38,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:29:38,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:29:38,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:29:38,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:29:38,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:29:38,217 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:29:38,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:29:38,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:29:38,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:29:38,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:29:38,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:29:38,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:29:38,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:29:38,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:29:38,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:29:38,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:29:38,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:29:38,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:29:38,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:29:38,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:29:38,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:29:38,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:29:38,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:29:38,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:29:38,693 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:29:38,694 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-04 13:29:38,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a95c77426/d584a9c1beea45ea8b19f6e3f70a2a73/FLAG0e89a5fc3 [2020-09-04 13:29:39,360 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:29:39,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-04 13:29:39,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a95c77426/d584a9c1beea45ea8b19f6e3f70a2a73/FLAG0e89a5fc3 [2020-09-04 13:29:39,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a95c77426/d584a9c1beea45ea8b19f6e3f70a2a73 [2020-09-04 13:29:39,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:29:39,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:29:39,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:29:39,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:29:39,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:29:39,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500f2ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:39, skipping insertion in model container [2020-09-04 13:29:39,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:29:39" (1/1) ... [2020-09-04 13:29:39,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:29:39,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:29:39,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:29:39,983 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:29:40,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:29:40,113 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:29:40,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40 WrapperNode [2020-09-04 13:29:40,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:29:40,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:29:40,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:29:40,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:29:40,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (1/1) ... [2020-09-04 13:29:40,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (1/1) ... [2020-09-04 13:29:40,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (1/1) ... [2020-09-04 13:29:40,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (1/1) ... [2020-09-04 13:29:40,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (1/1) ... [2020-09-04 13:29:40,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (1/1) ... [2020-09-04 13:29:40,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (1/1) ... [2020-09-04 13:29:40,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:29:40,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:29:40,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:29:40,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:29:40,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:29:40,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:29:40,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:29:40,243 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-04 13:29:40,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:29:40,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:29:40,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:29:40,243 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 13:29:40,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 13:29:40,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:29:40,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:29:40,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:29:40,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:29:40,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 13:29:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:29:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:29:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:29:40,590 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:29:40,590 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 13:29:40,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:29:40 BoogieIcfgContainer [2020-09-04 13:29:40,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:29:40,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:29:40,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:29:40,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:29:40,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:29:39" (1/3) ... [2020-09-04 13:29:40,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2393ca39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:29:40, skipping insertion in model container [2020-09-04 13:29:40,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:29:40" (2/3) ... [2020-09-04 13:29:40,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2393ca39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:29:40, skipping insertion in model container [2020-09-04 13:29:40,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:29:40" (3/3) ... [2020-09-04 13:29:40,604 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-09-04 13:29:40,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:29:40,624 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:29:40,642 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:29:40,668 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:29:40,668 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:29:40,668 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:29:40,669 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:29:40,669 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:29:40,669 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:29:40,669 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:29:40,669 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:29:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-04 13:29:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-04 13:29:40,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:40,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:40,696 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-09-04 13:29:40,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:40,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177850960] [2020-09-04 13:29:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:29:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:40,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177850960] [2020-09-04 13:29:40,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:29:40,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:29:40,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715983997] [2020-09-04 13:29:40,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:29:40,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:29:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:29:40,997 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-09-04 13:29:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:41,109 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-09-04 13:29:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:29:41,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-04 13:29:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:41,123 INFO L225 Difference]: With dead ends: 42 [2020-09-04 13:29:41,124 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 13:29:41,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:29:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 13:29:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-04 13:29:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-04 13:29:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-04 13:29:41,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-09-04 13:29:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:41,170 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-04 13:29:41,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:29:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-04 13:29:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:29:41,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:41,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:41,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:29:41,172 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-09-04 13:29:41,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:41,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770580341] [2020-09-04 13:29:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 13:29:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:41,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770580341] [2020-09-04 13:29:41,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:29:41,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:29:41,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950092768] [2020-09-04 13:29:41,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:29:41,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:29:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:29:41,291 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-09-04 13:29:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:41,360 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-04 13:29:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:29:41,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-09-04 13:29:41,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:41,362 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:29:41,362 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 13:29:41,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:29:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 13:29:41,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-04 13:29:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:29:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 13:29:41,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-09-04 13:29:41,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:41,371 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 13:29:41,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:29:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 13:29:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 13:29:41,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:41,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:41,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:29:41,373 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2020-09-04 13:29:41,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:41,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876555482] [2020-09-04 13:29:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-04 13:29:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:41,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876555482] [2020-09-04 13:29:41,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193504282] [2020-09-04 13:29:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:29:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:29:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:41,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:41,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-09-04 13:29:41,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324444879] [2020-09-04 13:29:41,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:29:41,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:41,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:29:41,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:29:41,669 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-09-04 13:29:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:41,747 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-09-04 13:29:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:29:41,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-04 13:29:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:41,749 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:29:41,749 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:29:41,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:29:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:29:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-04 13:29:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-04 13:29:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-09-04 13:29:41,756 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-09-04 13:29:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:41,757 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-09-04 13:29:41,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:29:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-09-04 13:29:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:29:41,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:41,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:41,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:29:41,973 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash -9513713, now seen corresponding path program 2 times [2020-09-04 13:29:41,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:41,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094067237] [2020-09-04 13:29:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 13:29:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:42,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094067237] [2020-09-04 13:29:42,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360555064] [2020-09-04 13:29:42,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:29:42,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-09-04 13:29:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:42,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-04 13:29:42,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:42,250 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-09-04 13:29:42,251 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:29:42,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:29:42,273 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-09-04 13:29:42,273 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:29:42,285 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:29:42,285 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:29:42,286 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:35 [2020-09-04 13:29:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:29:42,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:29:42,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-09-04 13:29:42,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228160878] [2020-09-04 13:29:42,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:29:42,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:42,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:29:42,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:29:42,424 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-09-04 13:29:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:42,510 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-09-04 13:29:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:29:42,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-09-04 13:29:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:42,512 INFO L225 Difference]: With dead ends: 33 [2020-09-04 13:29:42,512 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 13:29:42,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:29:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 13:29:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 13:29:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 13:29:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-04 13:29:42,518 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-09-04 13:29:42,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:42,519 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-04 13:29:42,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:29:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-04 13:29:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:29:42,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:42,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:42,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:42,734 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:42,735 INFO L82 PathProgramCache]: Analyzing trace with hash -413303094, now seen corresponding path program 1 times [2020-09-04 13:29:42,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:42,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829243600] [2020-09-04 13:29:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 13:29:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:29:42,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829243600] [2020-09-04 13:29:42,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560425533] [2020-09-04 13:29:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:29:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:29:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:29:42,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:42,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-09-04 13:29:42,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720575180] [2020-09-04 13:29:42,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:29:42,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:29:42,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:29:42,929 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-09-04 13:29:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:42,988 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-04 13:29:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:29:42,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-04 13:29:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:42,990 INFO L225 Difference]: With dead ends: 42 [2020-09-04 13:29:42,990 INFO L226 Difference]: Without dead ends: 28 [2020-09-04 13:29:42,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:29:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-04 13:29:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-04 13:29:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:29:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 13:29:42,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-09-04 13:29:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:42,997 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 13:29:42,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:29:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 13:29:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:29:42,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:42,998 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:43,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:43,212 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash -50594516, now seen corresponding path program 2 times [2020-09-04 13:29:43,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:43,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588555] [2020-09-04 13:29:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:29:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:29:43,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588555] [2020-09-04 13:29:43,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552379374] [2020-09-04 13:29:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:43,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:29:43,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:43,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:29:43,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:29:43,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:43,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-09-04 13:29:43,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612960570] [2020-09-04 13:29:43,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:29:43,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:29:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:29:43,429 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-09-04 13:29:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:43,514 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-04 13:29:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:29:43,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-04 13:29:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:43,515 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:29:43,516 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:29:43,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:29:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:29:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-04 13:29:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-04 13:29:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-09-04 13:29:43,523 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-09-04 13:29:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:43,523 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-09-04 13:29:43,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:29:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-09-04 13:29:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:29:43,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:43,525 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:29:43,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:43,739 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash 619997966, now seen corresponding path program 3 times [2020-09-04 13:29:43,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:43,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602350138] [2020-09-04 13:29:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:29:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:29:43,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602350138] [2020-09-04 13:29:43,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684590194] [2020-09-04 13:29:43,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:29:43,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-04 13:29:43,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:29:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-04 13:29:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:43,994 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-09-04 13:29:43,995 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:29:44,005 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:29:44,011 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-09-04 13:29:44,012 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:29:44,021 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:29:44,025 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:29:44,025 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:43, output treesize:17 [2020-09-04 13:29:44,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:29:44,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:29:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 13:29:44,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:44,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-09-04 13:29:44,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853336387] [2020-09-04 13:29:44,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:29:44,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:44,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:29:44,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:29:44,295 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2020-09-04 13:29:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:44,609 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-09-04 13:29:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:29:44,609 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-09-04 13:29:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:44,610 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:29:44,610 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:29:44,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:29:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:29:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:29:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:29:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:29:44,612 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-09-04 13:29:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:44,612 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:29:44,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:29:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:29:44,613 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:29:44,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:29:44,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:29:44,919 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:29:44,919 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-04 13:29:44,919 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:29:44,920 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:29:44,920 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:29:44,920 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:29:44,920 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:29:44,922 INFO L264 CegarLoopResult]: At program point L37-4(lines 37 39) the Hoare annotation is: (let ((.cse0 (select (select |#memory_$Pointer$.base| |main_~#cont~0.base|) |main_~#cont~0.offset|)) (.cse1 (+ (select (select |#memory_$Pointer$.offset| |main_~#cont~0.base|) |main_~#cont~0.offset|) 4))) (and (= .cse0 main_~pa~0.base) (<= (select (select |#memory_int| .cse0) .cse1) main_~i~0) (= .cse1 main_~pa~0.offset) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)))) [2020-09-04 13:29:44,922 INFO L268 CegarLoopResult]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2020-09-04 13:29:44,922 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 50) no Hoare annotation was computed. [2020-09-04 13:29:44,922 INFO L271 CegarLoopResult]: At program point L27-3(lines 27 30) the Hoare annotation is: true [2020-09-04 13:29:44,922 INFO L268 CegarLoopResult]: For program point L27-4(lines 21 50) no Hoare annotation was computed. [2020-09-04 13:29:44,923 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 50) no Hoare annotation was computed. [2020-09-04 13:29:44,924 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-09-04 13:29:44,924 INFO L268 CegarLoopResult]: For program point L40-1(lines 40 42) no Hoare annotation was computed. [2020-09-04 13:29:44,924 INFO L268 CegarLoopResult]: For program point L32(lines 32 44) no Hoare annotation was computed. [2020-09-04 13:29:44,925 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2020-09-04 13:29:44,925 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 20 50) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-04 13:29:44,925 INFO L264 CegarLoopResult]: At program point L41(lines 21 50) the Hoare annotation is: false [2020-09-04 13:29:44,925 INFO L268 CegarLoopResult]: For program point L37-1(lines 37 39) no Hoare annotation was computed. [2020-09-04 13:29:44,925 INFO L268 CegarLoopResult]: For program point L35(lines 35 43) no Hoare annotation was computed. [2020-09-04 13:29:44,925 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 39) the Hoare annotation is: (and (= (select (select |#memory_$Pointer$.base| |main_~#cont~0.base|) |main_~#cont~0.offset|) main_~pa~0.base) (= (+ (select (select |#memory_$Pointer$.offset| |main_~#cont~0.base|) |main_~#cont~0.offset|) 4) main_~pa~0.offset) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) [2020-09-04 13:29:44,926 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 15 18) the Hoare annotation is: true [2020-09-04 13:29:44,926 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 15 18) no Hoare annotation was computed. [2020-09-04 13:29:44,926 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 15 18) no Hoare annotation was computed. [2020-09-04 13:29:44,942 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-04 13:29:44,944 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-04 13:29:44,947 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-04 13:29:44,947 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-04 13:29:44,947 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-04 13:29:44,950 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-04 13:29:44,951 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-04 13:29:44,952 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-04 13:29:44,952 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-04 13:29:44,952 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-04 13:29:44,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:29:44 BoogieIcfgContainer [2020-09-04 13:29:44,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:29:44,960 INFO L168 Benchmark]: Toolchain (without parser) took 5261.22 ms. Allocated memory was 139.5 MB in the beginning and 245.9 MB in the end (delta: 106.4 MB). Free memory was 101.3 MB in the beginning and 124.5 MB in the end (delta: -23.3 MB). Peak memory consumption was 83.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:44,961 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:29:44,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 415.10 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.9 MB in the beginning and 181.8 MB in the end (delta: -81.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:44,968 INFO L168 Benchmark]: Boogie Preprocessor took 53.48 ms. Allocated memory is still 202.9 MB. Free memory was 181.8 MB in the beginning and 179.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:44,969 INFO L168 Benchmark]: RCFGBuilder took 426.08 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 161.3 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:44,971 INFO L168 Benchmark]: TraceAbstraction took 4361.03 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 161.3 MB in the beginning and 124.5 MB in the end (delta: 36.8 MB). Peak memory consumption was 79.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:44,984 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 415.10 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.9 MB in the beginning and 181.8 MB in the end (delta: -81.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 53.48 ms. Allocated memory is still 202.9 MB. Free memory was 181.8 MB in the beginning and 179.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 426.08 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 161.3 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4361.03 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 161.3 MB in the beginning and 124.5 MB in the end (delta: 36.8 MB). Peak memory consumption was 79.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: 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: 37]: Loop Invariant [2020-09-04 13:29:45,000 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-04 13:29:45,000 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-04 13:29:45,001 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-04 13:29:45,001 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-04 13:29:45,001 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-04 13:29:45,002 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-04 13:29:45,002 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-04 13:29:45,002 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-04 13:29:45,003 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-04 13:29:45,005 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (#memory_$Pointer$[cont][cont] == pa && #memory_$Pointer$[cont][cont] + 4 == pa) && i <= unknown-#memory_int-unknown[pa][pa] - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 33 SDslu, 256 SDs, 0 SdLazy, 342 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, 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, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 16 PreInvPairs, 24 NumberOfFragments, 83 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 74 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 275 NumberOfCodeBlocks, 265 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 263 ConstructedInterpolants, 2 QuantifiedInterpolants, 17852 SizeOfPredicates, 25 NumberOfNonLiveVariables, 589 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 31/80 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...