/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:37,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:37,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:37,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:37,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:37,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:37,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:37,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:37,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:37,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:37,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:37,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 22:45:37,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:37,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:37,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:37,255 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 [2020-11-06 22:45:37,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:37,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:37,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:37,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:37,291 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:37,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:37,292 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:37,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:37,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:37,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:37,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:37,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:37,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:37,294 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:37,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:37,295 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:37,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:37,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:37,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:37,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:37,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:37,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:37,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:37,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:37,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:37,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:37,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:37,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:37,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:37,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:37,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:37,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:37,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:37,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:37,812 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:37,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-11-06 22:45:37,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45b486e13/eab90b986801492f9dd37d8040da476b/FLAG1ad9d485f [2020-11-06 22:45:38,610 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:38,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-11-06 22:45:38,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45b486e13/eab90b986801492f9dd37d8040da476b/FLAG1ad9d485f [2020-11-06 22:45:38,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45b486e13/eab90b986801492f9dd37d8040da476b [2020-11-06 22:45:38,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:39,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:39,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:39,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:39,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:39,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:39,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723f04c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39, skipping insertion in model container [2020-11-06 22:45:39,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:39,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:39,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:39,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:39,373 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:39,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:39,421 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:39,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39 WrapperNode [2020-11-06 22:45:39,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:39,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:39,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:39,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:39,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (1/1) ... [2020-11-06 22:45:39,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (1/1) ... [2020-11-06 22:45:39,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (1/1) ... [2020-11-06 22:45:39,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (1/1) ... [2020-11-06 22:45:39,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (1/1) ... [2020-11-06 22:45:39,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (1/1) ... [2020-11-06 22:45:39,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (1/1) ... [2020-11-06 22:45:39,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:39,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:39,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:39,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:39,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (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 [2020-11-06 22:45:39,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:39,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:39,600 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:39,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:39,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:39,601 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:39,601 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:39,601 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:39,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:39,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:39,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:39,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:39,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:39,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:40,013 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:40,014 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:40,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:40 BoogieIcfgContainer [2020-11-06 22:45:40,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:40,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:40,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:40,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:40,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:38" (1/3) ... [2020-11-06 22:45:40,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc9522f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:40, skipping insertion in model container [2020-11-06 22:45:40,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:39" (2/3) ... [2020-11-06 22:45:40,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc9522f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:40, skipping insertion in model container [2020-11-06 22:45:40,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:40" (3/3) ... [2020-11-06 22:45:40,027 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-11-06 22:45:40,046 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:40,050 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:40,066 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:40,112 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:40,112 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:40,114 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:40,114 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:40,114 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:40,114 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:40,114 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:40,115 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:45:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:40,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:40,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:40,152 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:40,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:40,163 INFO L82 PathProgramCache]: Analyzing trace with hash 665310781, now seen corresponding path program 1 times [2020-11-06 22:45:40,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:40,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442758464] [2020-11-06 22:45:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:40,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442758464] [2020-11-06 22:45:40,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:40,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:40,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671629628] [2020-11-06 22:45:40,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:40,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:40,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:40,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:40,522 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-11-06 22:45:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:40,638 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-11-06 22:45:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:40,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-06 22:45:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:40,658 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:45:40,658 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:45:40,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:45:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:45:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:45:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-06 22:45:40,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-06 22:45:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:40,735 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-06 22:45:40,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-06 22:45:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:40,737 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:40,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:40,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:40,738 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:40,740 INFO L82 PathProgramCache]: Analyzing trace with hash -364744009, now seen corresponding path program 1 times [2020-11-06 22:45:40,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:40,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877815569] [2020-11-06 22:45:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:40,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877815569] [2020-11-06 22:45:40,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:40,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:45:40,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544208737] [2020-11-06 22:45:40,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:45:40,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:40,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:45:40,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:45:40,953 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-11-06 22:45:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:41,020 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-11-06 22:45:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:45:41,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-06 22:45:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:41,022 INFO L225 Difference]: With dead ends: 24 [2020-11-06 22:45:41,022 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:45:41,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:45:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:45:41,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-11-06 22:45:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:45:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-06 22:45:41,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-11-06 22:45:41,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:41,033 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-06 22:45:41,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:45:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-06 22:45:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:45:41,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:41,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:41,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:41,035 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1375402741, now seen corresponding path program 1 times [2020-11-06 22:45:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:41,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989002955] [2020-11-06 22:45:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:41,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:41,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989002955] [2020-11-06 22:45:41,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288210656] [2020-11-06 22:45:41,232 INFO L95 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 [2020-11-06 22:45:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:41,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:45:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:41,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:41,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:45:41,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521272594] [2020-11-06 22:45:41,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:41,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:41,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:41,507 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2020-11-06 22:45:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:41,614 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-11-06 22:45:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:41,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:45:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:41,615 INFO L225 Difference]: With dead ends: 26 [2020-11-06 22:45:41,615 INFO L226 Difference]: Without dead ends: 19 [2020-11-06 22:45:41,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-06 22:45:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-11-06 22:45:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:45:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-06 22:45:41,623 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-11-06 22:45:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:41,623 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-06 22:45:41,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-06 22:45:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:45:41,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:41,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:41,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:45:41,840 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:41,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1380815949, now seen corresponding path program 2 times [2020-11-06 22:45:41,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:41,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039849954] [2020-11-06 22:45:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:41,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:42,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039849954] [2020-11-06 22:45:42,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052612719] [2020-11-06 22:45:42,006 INFO L93 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 [2020-11-06 22:45:42,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:42,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:45:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:42,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:42,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-06 22:45:42,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765644477] [2020-11-06 22:45:42,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:45:42,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:42,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:45:42,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:42,106 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-11-06 22:45:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:42,171 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-11-06 22:45:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:42,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-06 22:45:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:42,173 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:45:42,173 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:45:42,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:45:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-06 22:45:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:45:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-11-06 22:45:42,181 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-11-06 22:45:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:42,181 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-11-06 22:45:42,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:45:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-11-06 22:45:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:45:42,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:42,183 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:42,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:42,398 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -112155407, now seen corresponding path program 3 times [2020-11-06 22:45:42,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:42,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732177931] [2020-11-06 22:45:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:42,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:42,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732177931] [2020-11-06 22:45:42,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376640927] [2020-11-06 22:45:42,490 INFO L93 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 [2020-11-06 22:45:42,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:45:42,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:42,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:45:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:42,607 INFO L382 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 [2020-11-06 22:45:42,608 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:45:42,616 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:45:42,617 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:45:42,618 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-11-06 22:45:42,739 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:45:42,740 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2020-11-06 22:45:42,741 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-06 22:45:42,760 INFO L625 ElimStorePlain]: treesize reduction 11, result has 47.6 percent of original size [2020-11-06 22:45:42,762 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:45:42,762 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:27, output treesize:7 [2020-11-06 22:45:42,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:45:42,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:45:42,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2020-11-06 22:45:42,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248886590] [2020-11-06 22:45:42,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:45:42,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:42,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:45:42,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:45:42,877 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-11-06 22:45:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:45,139 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-06 22:45:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:45:45,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-06 22:45:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:45,140 INFO L225 Difference]: With dead ends: 20 [2020-11-06 22:45:45,140 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:45:45,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:45:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:45:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:45:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:45:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:45:45,142 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-06 22:45:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:45,143 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:45:45,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:45:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:45:45,143 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:45:45,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:45,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:45:45,483 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:45:45,483 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:45:45,484 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:45:45,484 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:45:45,484 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:45,484 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:45:45,484 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:45,485 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:45,485 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:45:45,485 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:45:45,485 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:45,485 INFO L262 CegarLoopResult]: At program point mainENTRY(lines 12 21) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-11-06 22:45:45,485 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 12 21) no Hoare annotation was computed. [2020-11-06 22:45:45,486 INFO L262 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (exists ((v_main_~i~0_10 Int)) (and (<= main_~i~0 (+ v_main_~i~0_10 1)) (< v_main_~i~0_10 1024) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))))) (<= 1023 |main_#t~mem8|) (< |main_#t~mem8| 1024) (exists ((v_main_~i~0_10 Int)) (and (< v_main_~i~0_10 1024) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))) (<= 1023 v_main_~i~0_10)))) [2020-11-06 22:45:45,486 INFO L266 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-11-06 22:45:45,486 INFO L266 CegarLoopResult]: For program point L16-2(lines 16 18) no Hoare annotation was computed. [2020-11-06 22:45:45,486 INFO L262 CegarLoopResult]: At program point L16-3(lines 16 18) the Hoare annotation is: (or (exists ((v_main_~i~0_10 Int)) (and (<= main_~i~0 (+ v_main_~i~0_10 1)) (< v_main_~i~0_10 1024) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))))) (= main_~i~0 0)) [2020-11-06 22:45:45,486 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 12 21) no Hoare annotation was computed. [2020-11-06 22:45:45,487 INFO L266 CegarLoopResult]: For program point L16-4(lines 16 18) no Hoare annotation was computed. [2020-11-06 22:45:45,487 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-11-06 22:45:45,487 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-11-06 22:45:45,487 INFO L262 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-11-06 22:45:45,487 INFO L266 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-11-06 22:45:45,487 INFO L266 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-11-06 22:45:45,487 INFO L266 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-11-06 22:45:45,497 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,499 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,499 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,499 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,501 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:45:45,508 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,508 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,509 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,509 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,509 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:45:45,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:45 BoogieIcfgContainer [2020-11-06 22:45:45,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:45,514 INFO L168 Benchmark]: Toolchain (without parser) took 6515.10 ms. Allocated memory is still 152.0 MB. Free memory was 127.5 MB in the beginning and 103.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:45,515 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:45,516 INFO L168 Benchmark]: CACSL2BoogieTranslator took 412.24 ms. Allocated memory is still 152.0 MB. Free memory was 126.9 MB in the beginning and 117.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:45,517 INFO L168 Benchmark]: Boogie Preprocessor took 72.17 ms. Allocated memory is still 152.0 MB. Free memory was 117.6 MB in the beginning and 116.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:45,518 INFO L168 Benchmark]: RCFGBuilder took 515.17 ms. Allocated memory is still 152.0 MB. Free memory was 116.0 MB in the beginning and 103.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:45,518 INFO L168 Benchmark]: TraceAbstraction took 5494.17 ms. Allocated memory is still 152.0 MB. Free memory was 102.8 MB in the beginning and 103.1 MB in the end (delta: -387.9 kB). Peak memory consumption was 1.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:45,522 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 412.24 ms. Allocated memory is still 152.0 MB. Free memory was 126.9 MB in the beginning and 117.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.17 ms. Allocated memory is still 152.0 MB. Free memory was 117.6 MB in the beginning and 116.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 515.17 ms. Allocated memory is still 152.0 MB. Free memory was 116.0 MB in the beginning and 103.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5494.17 ms. Allocated memory is still 152.0 MB. Free memory was 102.8 MB in the beginning and 103.1 MB in the end (delta: -387.9 kB). Peak memory consumption was 1.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 16]: Loop Invariant [2020-11-06 22:45:45,531 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,531 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,531 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,531 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,532 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:45:45,532 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,532 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,532 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,533 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-11-06 22:45:45,533 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (\exists v_main_~i~0_10 : int :: (i <= v_main_~i~0_10 + 1 && v_main_~i~0_10 < 1024) && v_main_~i~0_10 == unknown-#memory_int-unknown[A][v_main_~i~0_10 * 4 + A]) || i == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 24 SDslu, 83 SDs, 0 SdLazy, 117 SolverSat, 15 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, 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, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 21 PreInvPairs, 25 NumberOfFragments, 118 HoareAnnotationTreeSize, 21 FomulaSimplifications, 50 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 62 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 128 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 120 ConstructedInterpolants, 2 QuantifiedInterpolants, 5880 SizeOfPredicates, 8 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 9/28 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...