/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-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:15,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:15,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:16,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:46:16,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:16,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:16,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:16,156 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 22:46:16,210 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:16,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:16,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:16,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:16,215 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:16,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:16,216 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:16,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:16,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:16,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:16,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:16,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:16,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:16,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:16,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:16,218 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:16,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:16,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:16,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:16,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:16,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:16,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:16,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:16,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:16,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:16,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:16,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:16,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:16,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:16,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:16,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:16,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:16,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:16,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:16,660 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:16,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-11-06 22:46:16,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8481cb5/1032e0f74e8343d5b1a4be4878d27dac/FLAGe3d75c0c8 [2020-11-06 22:46:17,381 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:17,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-11-06 22:46:17,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8481cb5/1032e0f74e8343d5b1a4be4878d27dac/FLAGe3d75c0c8 [2020-11-06 22:46:17,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8481cb5/1032e0f74e8343d5b1a4be4878d27dac [2020-11-06 22:46:17,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:17,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:17,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:17,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:17,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:17,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:17" (1/1) ... [2020-11-06 22:46:17,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec433c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:17, skipping insertion in model container [2020-11-06 22:46:17,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:17" (1/1) ... [2020-11-06 22:46:17,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:17,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:17,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:17,977 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:18,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:18,035 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:18,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18 WrapperNode [2020-11-06 22:46:18,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:18,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:18,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:18,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:18,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (1/1) ... [2020-11-06 22:46:18,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (1/1) ... [2020-11-06 22:46:18,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (1/1) ... [2020-11-06 22:46:18,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (1/1) ... [2020-11-06 22:46:18,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (1/1) ... [2020-11-06 22:46:18,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (1/1) ... [2020-11-06 22:46:18,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (1/1) ... [2020-11-06 22:46:18,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:18,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:18,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:18,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:18,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (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 22:46:18,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:18,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:46:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:46:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:46:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:46:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:46:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:18,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:18,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:18,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:18,569 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:18,569 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:46:18,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:18 BoogieIcfgContainer [2020-11-06 22:46:18,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:18,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:18,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:18,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:18,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:17" (1/3) ... [2020-11-06 22:46:18,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fb08e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:18, skipping insertion in model container [2020-11-06 22:46:18,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:18" (2/3) ... [2020-11-06 22:46:18,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fb08e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:18, skipping insertion in model container [2020-11-06 22:46:18,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:18" (3/3) ... [2020-11-06 22:46:18,603 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2020-11-06 22:46:18,620 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:18,624 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:18,639 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:18,669 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:18,670 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:18,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:18,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:18,670 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:18,670 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:18,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:18,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-06 22:46:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:46:18,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:18,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:18,698 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1398405025, now seen corresponding path program 1 times [2020-11-06 22:46:18,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:18,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573855540] [2020-11-06 22:46:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:18,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,013 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 22:46:19,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573855540] [2020-11-06 22:46:19,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:19,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:46:19,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131487961] [2020-11-06 22:46:19,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:46:19,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:46:19,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:46:19,056 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-11-06 22:46:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:19,245 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-11-06 22:46:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:46:19,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-06 22:46:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:19,255 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:46:19,255 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:46:19,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:46:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:46:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:46:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:46:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-06 22:46:19,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-06 22:46:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:19,302 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-06 22:46:19,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:46:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-06 22:46:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:46:19,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:19,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:19,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:46:19,304 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1611202977, now seen corresponding path program 1 times [2020-11-06 22:46:19,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:19,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362660570] [2020-11-06 22:46:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,426 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 22:46:19,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362660570] [2020-11-06 22:46:19,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002160830] [2020-11-06 22:46:19,427 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 22:46:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:46:19,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:19,633 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 22:46:19,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:19,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-06 22:46:19,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574414637] [2020-11-06 22:46:19,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:46:19,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:46:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:46:19,638 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-11-06 22:46:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:19,771 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-06 22:46:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:46:19,772 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-06 22:46:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:19,774 INFO L225 Difference]: With dead ends: 23 [2020-11-06 22:46:19,774 INFO L226 Difference]: Without dead ends: 16 [2020-11-06 22:46:19,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:46:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-06 22:46:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-06 22:46:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:46:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-06 22:46:19,784 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-11-06 22:46:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:19,784 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-06 22:46:19,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:46:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-06 22:46:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:46:19,785 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:19,785 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:19,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:46:19,999 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:20,001 INFO L82 PathProgramCache]: Analyzing trace with hash 381995103, now seen corresponding path program 2 times [2020-11-06 22:46:20,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:20,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261129425] [2020-11-06 22:46:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:20,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:20,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261129425] [2020-11-06 22:46:20,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789532048] [2020-11-06 22:46:20,155 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 22:46:20,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:46:20,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:46:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:20,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:20,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-06 22:46:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369168548] [2020-11-06 22:46:20,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:46:20,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:46:20,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:46:20,351 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-11-06 22:46:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:20,542 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-11-06 22:46:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:46:20,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-11-06 22:46:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:20,543 INFO L225 Difference]: With dead ends: 24 [2020-11-06 22:46:20,543 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:46:20,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:46:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:46:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-06 22:46:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:46:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-06 22:46:20,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-11-06 22:46:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:20,551 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-06 22:46:20,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:46:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-06 22:46:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:46:20,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:20,553 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:20,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:20,768 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2041593439, now seen corresponding path program 3 times [2020-11-06 22:46:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:20,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484382298] [2020-11-06 22:46:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:21,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:21,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484382298] [2020-11-06 22:46:21,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319677861] [2020-11-06 22:46:21,132 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 22:46:21,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:46:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:46:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:21,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:21,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-06 22:46:21,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090096117] [2020-11-06 22:46:21,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:46:21,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:21,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:46:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:46:21,314 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-11-06 22:46:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:21,515 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-11-06 22:46:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:46:21,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-11-06 22:46:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:21,517 INFO L225 Difference]: With dead ends: 25 [2020-11-06 22:46:21,517 INFO L226 Difference]: Without dead ends: 18 [2020-11-06 22:46:21,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:46:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-06 22:46:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-06 22:46:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:46:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-06 22:46:21,524 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-11-06 22:46:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:21,525 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-06 22:46:21,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:46:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-06 22:46:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:46:21,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:21,526 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:21,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:21,739 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1949534303, now seen corresponding path program 4 times [2020-11-06 22:46:21,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:21,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895406035] [2020-11-06 22:46:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:21,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:21,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895406035] [2020-11-06 22:46:21,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178987824] [2020-11-06 22:46:21,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:22,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:46:22,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:22,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 22:46:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:22,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:46:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:22,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:22,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-11-06 22:46:22,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205407550] [2020-11-06 22:46:22,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:46:22,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:22,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:46:22,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:46:22,179 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 16 states. [2020-11-06 22:46:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:22,643 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-06 22:46:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:46:22,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2020-11-06 22:46:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:22,644 INFO L225 Difference]: With dead ends: 22 [2020-11-06 22:46:22,644 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:46:22,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:46:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:46:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:46:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:46:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:46:22,646 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-06 22:46:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:22,647 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:46:22,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:46:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:46:22,647 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:46:22,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:22,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:46:23,153 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-11-06 22:46:23,155 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-11-06 22:46:23,155 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-06 22:46:23,156 INFO L266 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-11-06 22:46:23,156 INFO L266 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-06 22:46:23,156 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-06 22:46:23,156 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:23,156 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-06 22:46:23,156 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:23,156 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:23,157 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:46:23,157 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:46:23,157 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:23,157 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-06 22:46:23,157 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:23,157 INFO L266 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:23,157 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:23,157 INFO L266 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-11-06 22:46:23,158 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 24 34) the Hoare annotation is: true [2020-11-06 22:46:23,158 INFO L262 CegarLoopResult]: At program point L28-2(lines 28 31) the Hoare annotation is: (let ((.cse0 (<= 7 main_~i~0))) (or (and (= main_~j~0 9) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (= main_~j~0 10) (= main_~i~0 1)) (and (<= 5 main_~i~0) (<= main_~i~0 5) (= main_~j~0 8)) (and .cse0 (<= main_~i~0 7) (= 7 main_~j~0)) (and .cse0 (<= main_~j~0 6) (<= 6 main_~j~0)))) [2020-11-06 22:46:23,158 INFO L262 CegarLoopResult]: At program point L28-3(lines 28 31) the Hoare annotation is: (and (<= 7 main_~i~0) (<= main_~j~0 6) (<= 6 main_~j~0)) [2020-11-06 22:46:23,158 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 24 34) no Hoare annotation was computed. [2020-11-06 22:46:23,158 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 24 34) no Hoare annotation was computed. [2020-11-06 22:46:23,158 INFO L266 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:23,159 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-06 22:46:23,159 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:23,159 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-11-06 22:46:23,159 INFO L266 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-06 22:46:23,159 INFO L266 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-06 22:46:23,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:46:23 BoogieIcfgContainer [2020-11-06 22:46:23,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:46:23,177 INFO L168 Benchmark]: Toolchain (without parser) took 5468.24 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.4 MB in the beginning and 125.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 83.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:23,178 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 99.5 MB in the beginning and 99.4 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:46:23,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.39 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:23,180 INFO L168 Benchmark]: Boogie Preprocessor took 64.47 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:23,181 INFO L168 Benchmark]: RCFGBuilder took 464.71 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 102.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:23,182 INFO L168 Benchmark]: TraceAbstraction took 4602.12 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 101.7 MB in the beginning and 125.4 MB in the end (delta: -23.7 MB). Peak memory consumption was 59.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:23,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 99.5 MB in the beginning and 99.4 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 320.39 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.47 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 464.71 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 102.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4602.12 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 101.7 MB in the beginning and 125.4 MB in the end (delta: -23.7 MB). Peak memory consumption was 59.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 28]: Loop Invariant Derived loop invariant: (((((j == 9 && 3 <= i) && i <= 3) || (j == 10 && i == 1)) || ((5 <= i && i <= 5) && j == 8)) || ((7 <= i && i <= 7) && 7 == j)) || ((7 <= i && j <= 6) && 6 <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 39 SDslu, 121 SDs, 0 SdLazy, 169 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 23 PreInvPairs, 29 NumberOfFragments, 92 HoareAnnotationTreeSize, 23 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 248 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 137 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 5978 SizeOfPredicates, 8 NumberOfNonLiveVariables, 335 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 3/40 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...