/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-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:31,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:31,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:31,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:46:31,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:31,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:31,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:31,419 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 22:46:31,445 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:31,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:31,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:31,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:31,448 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:31,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:31,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:31,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:31,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:31,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:31,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:31,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:31,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:31,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:31,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:31,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:31,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:31,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:31,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:31,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:31,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:31,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:31,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:31,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:31,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:31,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:31,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:31,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:31,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:31,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:31,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:31,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:31,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:31,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:31,869 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:31,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-11-06 22:46:31,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2124cb6b4/f308d5147b4845698a4c4391f5fbd61a/FLAGe8b4d3486 [2020-11-06 22:46:32,656 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:32,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-11-06 22:46:32,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2124cb6b4/f308d5147b4845698a4c4391f5fbd61a/FLAGe8b4d3486 [2020-11-06 22:46:32,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2124cb6b4/f308d5147b4845698a4c4391f5fbd61a [2020-11-06 22:46:32,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:33,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:33,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:33,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:33,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:33,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:32" (1/1) ... [2020-11-06 22:46:33,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276e0545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33, skipping insertion in model container [2020-11-06 22:46:33,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:32" (1/1) ... [2020-11-06 22:46:33,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:33,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:33,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:33,205 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:33,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:33,245 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:33,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33 WrapperNode [2020-11-06 22:46:33,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:33,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:33,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:33,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:33,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2020-11-06 22:46:33,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2020-11-06 22:46:33,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2020-11-06 22:46:33,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2020-11-06 22:46:33,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2020-11-06 22:46:33,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2020-11-06 22:46:33,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2020-11-06 22:46:33,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:33,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:33,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:33,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:33,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (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 22:46:33,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:33,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:33,370 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:46:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:46:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:46:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:46:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:46:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:33,645 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:33,645 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:46:33,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:33 BoogieIcfgContainer [2020-11-06 22:46:33,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:33,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:33,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:33,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:33,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:32" (1/3) ... [2020-11-06 22:46:33,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65dd545c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:33, skipping insertion in model container [2020-11-06 22:46:33,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (2/3) ... [2020-11-06 22:46:33,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65dd545c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:33, skipping insertion in model container [2020-11-06 22:46:33,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:33" (3/3) ... [2020-11-06 22:46:33,658 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2020-11-06 22:46:33,680 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:33,685 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:33,709 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:33,804 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:33,807 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:33,807 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:33,808 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:33,808 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:33,808 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:33,808 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:33,808 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-11-06 22:46:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:46:33,863 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:33,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:33,868 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1531997128, now seen corresponding path program 1 times [2020-11-06 22:46:33,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:33,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585242053] [2020-11-06 22:46:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:34,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:34,168 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 22:46:34,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585242053] [2020-11-06 22:46:34,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:34,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:46:34,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355429169] [2020-11-06 22:46:34,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:46:34,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:46:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:46:34,195 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-11-06 22:46:34,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:34,260 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-11-06 22:46:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:46:34,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-06 22:46:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:34,269 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:46:34,270 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:46:34,273 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 22:46:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:46:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-06 22:46:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:46:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-06 22:46:34,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-11-06 22:46:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:34,317 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-06 22:46:34,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:46:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-06 22:46:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:46:34,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:34,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:34,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:46:34,319 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash 359391229, now seen corresponding path program 1 times [2020-11-06 22:46:34,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:34,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731907171] [2020-11-06 22:46:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:34,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:34,512 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 22:46:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731907171] [2020-11-06 22:46:34,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:34,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:46:34,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791278392] [2020-11-06 22:46:34,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:46:34,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:34,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:46:34,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:46:34,517 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2020-11-06 22:46:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:34,756 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-06 22:46:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:46:34,757 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-11-06 22:46:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:34,758 INFO L225 Difference]: With dead ends: 32 [2020-11-06 22:46:34,758 INFO L226 Difference]: Without dead ends: 19 [2020-11-06 22:46:34,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:46:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-06 22:46:34,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-06 22:46:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-06 22:46:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-11-06 22:46:34,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-11-06 22:46:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:34,769 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-11-06 22:46:34,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:46:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-11-06 22:46:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:46:34,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:34,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:34,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:46:34,771 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:34,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1040391040, now seen corresponding path program 1 times [2020-11-06 22:46:34,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:34,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326893838] [2020-11-06 22:46:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:34,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:34,917 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 22:46:34,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326893838] [2020-11-06 22:46:34,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755730129] [2020-11-06 22:46:34,919 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 22:46:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:46:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:35,102 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 22:46:35,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:35,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-06 22:46:35,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025542965] [2020-11-06 22:46:35,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:46:35,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:35,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:46:35,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:46:35,106 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2020-11-06 22:46:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:35,338 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-06 22:46:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:46:35,338 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-06 22:46:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:35,339 INFO L225 Difference]: With dead ends: 30 [2020-11-06 22:46:35,340 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:46:35,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:46:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:46:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-11-06 22:46:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-06 22:46:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-06 22:46:35,347 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-11-06 22:46:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:35,348 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-06 22:46:35,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:46:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-06 22:46:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:46:35,349 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:35,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:35,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:46:35,565 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:35,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:35,567 INFO L82 PathProgramCache]: Analyzing trace with hash -719745763, now seen corresponding path program 2 times [2020-11-06 22:46:35,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:35,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313009530] [2020-11-06 22:46:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:35,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:35,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313009530] [2020-11-06 22:46:35,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777476970] [2020-11-06 22:46:35,760 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 22:46:35,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:46:35,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:35,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:46:35,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:35,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:35,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:46:35,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343612659] [2020-11-06 22:46:35,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:46:35,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:46:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:46:35,840 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-11-06 22:46:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:35,973 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-06 22:46:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:46:35,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-06 22:46:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:35,975 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:46:35,975 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:46:35,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:46:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:46:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-11-06 22:46:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-06 22:46:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-06 22:46:35,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-11-06 22:46:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:35,982 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-06 22:46:35,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:46:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-06 22:46:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:46:35,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:35,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:36,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:36,188 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:36,189 INFO L82 PathProgramCache]: Analyzing trace with hash -39687393, now seen corresponding path program 1 times [2020-11-06 22:46:36,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:36,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190216894] [2020-11-06 22:46:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:36,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190216894] [2020-11-06 22:46:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549400342] [2020-11-06 22:46:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:46:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:36,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:46:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:36,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:46:36,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:46:36,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:46:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:36,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:36,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2020-11-06 22:46:36,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290588854] [2020-11-06 22:46:36,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:46:36,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:36,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:46:36,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:46:36,823 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 18 states. [2020-11-06 22:46:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:37,645 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-06 22:46:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:46:37,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-11-06 22:46:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:37,648 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:46:37,649 INFO L226 Difference]: Without dead ends: 29 [2020-11-06 22:46:37,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:46:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-06 22:46:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-11-06 22:46:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-06 22:46:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-06 22:46:37,657 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-11-06 22:46:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:37,657 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-06 22:46:37,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:46:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-06 22:46:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:46:37,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:37,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:37,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:37,862 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash 558638366, now seen corresponding path program 2 times [2020-11-06 22:46:37,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:37,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439879415] [2020-11-06 22:46:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:38,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:38,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439879415] [2020-11-06 22:46:38,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072868491] [2020-11-06 22:46:38,047 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 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 22:46:38,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:46:38,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-06 22:46:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:38,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:38,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-11-06 22:46:38,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017163826] [2020-11-06 22:46:38,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:46:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:46:38,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:46:38,233 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 16 states. [2020-11-06 22:46:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:39,121 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-11-06 22:46:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:46:39,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-11-06 22:46:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:39,124 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:46:39,124 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:46:39,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:46:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:46:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-11-06 22:46:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-06 22:46:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-06 22:46:39,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2020-11-06 22:46:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:39,148 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-06 22:46:39,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:46:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-06 22:46:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:46:39,153 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:39,153 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:39,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:39,355 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1847104705, now seen corresponding path program 3 times [2020-11-06 22:46:39,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:39,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224159236] [2020-11-06 22:46:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:39,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:46:39,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224159236] [2020-11-06 22:46:39,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682384434] [2020-11-06 22:46:39,655 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:39,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-06 22:46:39,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-06 22:46:39,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:40,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:46:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:40,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:40,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2020-11-06 22:46:40,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115060784] [2020-11-06 22:46:40,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-06 22:46:40,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:40,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-06 22:46:40,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-11-06 22:46:40,162 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 25 states. [2020-11-06 22:46:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:41,305 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-06 22:46:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-06 22:46:41,311 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2020-11-06 22:46:41,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:41,312 INFO L225 Difference]: With dead ends: 43 [2020-11-06 22:46:41,312 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:46:41,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2020-11-06 22:46:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:46:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:46:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:46:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:46:41,315 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-11-06 22:46:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:41,315 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:46:41,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-06 22:46:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:46:41,316 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:46:41,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:46:41,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:46:41,938 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 22 [2020-11-06 22:46:41,941 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-11-06 22:46:41,942 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-06 22:46:41,942 INFO L266 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-11-06 22:46:41,942 INFO L266 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-06 22:46:41,942 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-06 22:46:41,942 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:41,943 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 22:46:41,943 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:41,943 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:41,943 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:46:41,943 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:46:41,943 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:41,943 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-06 22:46:41,944 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:41,944 INFO L266 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:41,944 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:41,944 INFO L266 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-11-06 22:46:41,944 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 24 36) the Hoare annotation is: true [2020-11-06 22:46:41,944 INFO L266 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-11-06 22:46:41,944 INFO L266 CegarLoopResult]: For program point L29-2(lines 29 33) no Hoare annotation was computed. [2020-11-06 22:46:41,945 INFO L262 CegarLoopResult]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 2 main_~k~0)))) (and (= main_~i~0 0) (= main_~n~0 0)) (and (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) (< main_~n~0 (+ main_~k~0 1))))) [2020-11-06 22:46:41,945 INFO L262 CegarLoopResult]: At program point L29-4(lines 29 33) the Hoare annotation is: (or (and (<= main_~k~0 main_~n~0) (< main_~n~0 (+ main_~k~0 1))) (and (= main_~i~0 0) (= main_~n~0 0) (<= main_~k~0 0))) [2020-11-06 22:46:41,945 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 24 36) no Hoare annotation was computed. [2020-11-06 22:46:41,945 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 24 36) no Hoare annotation was computed. [2020-11-06 22:46:41,945 INFO L266 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-11-06 22:46:41,945 INFO L266 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:41,946 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-06 22:46:41,946 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:41,946 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-06 22:46:41,946 INFO L266 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-06 22:46:41,946 INFO L266 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-06 22:46:41,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:46:41 BoogieIcfgContainer [2020-11-06 22:46:41,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:46:41,965 INFO L168 Benchmark]: Toolchain (without parser) took 8965.46 ms. Allocated memory was 160.4 MB in the beginning and 245.4 MB in the end (delta: 84.9 MB). Free memory was 135.7 MB in the beginning and 192.3 MB in the end (delta: -56.5 MB). Peak memory consumption was 136.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:41,966 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 160.4 MB. Free memory is still 131.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:46:41,967 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.43 ms. Allocated memory is still 160.4 MB. Free memory was 135.1 MB in the beginning and 125.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:41,968 INFO L168 Benchmark]: Boogie Preprocessor took 38.00 ms. Allocated memory is still 160.4 MB. Free memory was 125.6 MB in the beginning and 124.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:41,968 INFO L168 Benchmark]: RCFGBuilder took 362.31 ms. Allocated memory is still 160.4 MB. Free memory was 124.0 MB in the beginning and 110.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:41,970 INFO L168 Benchmark]: TraceAbstraction took 8313.93 ms. Allocated memory was 160.4 MB in the beginning and 245.4 MB in the end (delta: 84.9 MB). Free memory was 109.9 MB in the beginning and 192.3 MB in the end (delta: -82.3 MB). Peak memory consumption was 109.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:41,973 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 160.4 MB. Free memory is still 131.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.43 ms. Allocated memory is still 160.4 MB. Free memory was 135.1 MB in the beginning and 125.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.00 ms. Allocated memory is still 160.4 MB. Free memory was 125.6 MB in the beginning and 124.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 362.31 ms. Allocated memory is still 160.4 MB. Free memory was 124.0 MB in the beginning and 110.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8313.93 ms. Allocated memory was 160.4 MB in the beginning and 245.4 MB in the end (delta: 84.9 MB). Free memory was 109.9 MB in the beginning and 192.3 MB in the end (delta: -82.3 MB). Peak memory consumption was 109.7 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: 29]: Loop Invariant Derived loop invariant: (((2 * n <= i + 1 && i + 1 <= 2 * n) && i + 1 <= 2 * k) || (i == 0 && n == 0)) || ((2 * n <= i && i <= 2 * n) && n < k + 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.7s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 174 SDslu, 254 SDs, 0 SdLazy, 745 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 225 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 35 PreInvPairs, 47 NumberOfFragments, 99 HoareAnnotationTreeSize, 35 FomulaSimplifications, 237 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 538 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 228 ConstructedInterpolants, 0 QuantifiedInterpolants, 26096 SizeOfPredicates, 11 NumberOfNonLiveVariables, 497 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 7/90 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...