/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:24:35,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:24:35,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:24:35,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:24:35,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:24:35,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:24:35,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:24:35,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:24:35,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:24:35,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:24:35,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:24:35,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:24:35,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:24:35,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:24:35,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:24:35,605 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:24:35,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:24:35,605 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:24:35,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:24:35,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:24:35,606 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:24:35,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:24:35,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:24:35,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:24:35,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:24:35,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:24:35,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:24:35,608 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:24:36,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:24:36,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:24:36,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:24:36,064 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:24:36,065 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:24:36,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-10-24 02:24:36,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c673a4c5/5ee1a05314304afdaaa1ca6f7369f62a/FLAGb9487fc25 [2020-10-24 02:24:36,910 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:24:36,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-10-24 02:24:36,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c673a4c5/5ee1a05314304afdaaa1ca6f7369f62a/FLAGb9487fc25 [2020-10-24 02:24:37,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c673a4c5/5ee1a05314304afdaaa1ca6f7369f62a [2020-10-24 02:24:37,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:24:37,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:24:37,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:37,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:24:37,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:24:37,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443b8856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37, skipping insertion in model container [2020-10-24 02:24:37,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:24:37,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:24:37,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:37,566 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:24:37,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:37,603 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:24:37,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37 WrapperNode [2020-10-24 02:24:37,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:37,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:24:37,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:24:37,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:24:37,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (1/1) ... [2020-10-24 02:24:37,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:24:37,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:24:37,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:24:37,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:24:37,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (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 [2020-10-24 02:24:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:24:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:24:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:24:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:24:37,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:24:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:24:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:24:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:24:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:24:37,726 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:24:37,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:24:37,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:24:37,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-24 02:24:37,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:24:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:24:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:24:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:24:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:24:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:24:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:24:38,012 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:24:38,012 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:24:38,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:38 BoogieIcfgContainer [2020-10-24 02:24:38,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:24:38,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:24:38,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:24:38,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:24:38,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:24:37" (1/3) ... [2020-10-24 02:24:38,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5280adb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:38, skipping insertion in model container [2020-10-24 02:24:38,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:37" (2/3) ... [2020-10-24 02:24:38,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5280adb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:38, skipping insertion in model container [2020-10-24 02:24:38,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:38" (3/3) ... [2020-10-24 02:24:38,027 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-10-24 02:24:38,046 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:24:38,053 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:24:38,072 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:24:38,122 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:24:38,122 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:24:38,122 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:24:38,122 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:24:38,123 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:24:38,123 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:24:38,123 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:24:38,123 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:24:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-24 02:24:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-24 02:24:38,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:38,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:38,184 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:38,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1030168209, now seen corresponding path program 1 times [2020-10-24 02:24:38,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:38,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384259080] [2020-10-24 02:24:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:38,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:38,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384259080] [2020-10-24 02:24:38,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:38,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:24:38,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516730956] [2020-10-24 02:24:38,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:24:38,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:24:38,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:38,709 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2020-10-24 02:24:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:39,186 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-24 02:24:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:24:39,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-24 02:24:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:39,205 INFO L225 Difference]: With dead ends: 72 [2020-10-24 02:24:39,205 INFO L226 Difference]: Without dead ends: 42 [2020-10-24 02:24:39,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:24:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-24 02:24:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-24 02:24:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-24 02:24:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-24 02:24:39,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 24 [2020-10-24 02:24:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:39,300 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-24 02:24:39,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:24:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-24 02:24:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 02:24:39,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:39,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:39,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:24:39,306 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash 540023015, now seen corresponding path program 1 times [2020-10-24 02:24:39,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:39,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786458407] [2020-10-24 02:24:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:39,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786458407] [2020-10-24 02:24:39,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:39,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:24:39,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551952486] [2020-10-24 02:24:39,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:24:39,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:24:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:39,643 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 12 states. [2020-10-24 02:24:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:40,273 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-24 02:24:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:24:40,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-24 02:24:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:40,278 INFO L225 Difference]: With dead ends: 71 [2020-10-24 02:24:40,278 INFO L226 Difference]: Without dead ends: 64 [2020-10-24 02:24:40,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:24:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-24 02:24:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-10-24 02:24:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 02:24:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-24 02:24:40,300 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2020-10-24 02:24:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:40,301 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-24 02:24:40,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:24:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-24 02:24:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-24 02:24:40,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:40,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:40,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:24:40,303 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash 577297853, now seen corresponding path program 1 times [2020-10-24 02:24:40,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:40,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530913623] [2020-10-24 02:24:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:40,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530913623] [2020-10-24 02:24:40,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:40,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:24:40,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912206752] [2020-10-24 02:24:40,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:24:40,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:24:40,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:24:40,562 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 9 states. [2020-10-24 02:24:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:41,030 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-10-24 02:24:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:24:41,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-24 02:24:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:41,034 INFO L225 Difference]: With dead ends: 71 [2020-10-24 02:24:41,034 INFO L226 Difference]: Without dead ends: 47 [2020-10-24 02:24:41,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:24:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-24 02:24:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-24 02:24:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-24 02:24:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-24 02:24:41,048 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-10-24 02:24:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:41,049 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-24 02:24:41,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:24:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-24 02:24:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 02:24:41,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:41,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:41,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:24:41,051 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:41,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1714669679, now seen corresponding path program 2 times [2020-10-24 02:24:41,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:41,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997171654] [2020-10-24 02:24:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:41,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997171654] [2020-10-24 02:24:41,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:41,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 02:24:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43819084] [2020-10-24 02:24:41,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 02:24:41,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 02:24:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:24:41,494 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 15 states. [2020-10-24 02:24:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:42,635 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-24 02:24:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:24:42,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-24 02:24:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:42,638 INFO L225 Difference]: With dead ends: 66 [2020-10-24 02:24:42,640 INFO L226 Difference]: Without dead ends: 59 [2020-10-24 02:24:42,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:24:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-24 02:24:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-10-24 02:24:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-24 02:24:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-24 02:24:42,656 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 42 [2020-10-24 02:24:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:42,657 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-24 02:24:42,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 02:24:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-24 02:24:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 02:24:42,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:42,659 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:42,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:24:42,659 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1101563205, now seen corresponding path program 2 times [2020-10-24 02:24:42,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:42,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550659263] [2020-10-24 02:24:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:42,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:42,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550659263] [2020-10-24 02:24:42,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:42,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:24:42,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992255014] [2020-10-24 02:24:42,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:24:42,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:24:42,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:24:42,896 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 13 states. [2020-10-24 02:24:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:43,656 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-24 02:24:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:24:43,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-24 02:24:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:43,659 INFO L225 Difference]: With dead ends: 72 [2020-10-24 02:24:43,659 INFO L226 Difference]: Without dead ends: 56 [2020-10-24 02:24:43,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:24:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-24 02:24:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-24 02:24:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 02:24:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-24 02:24:43,676 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-24 02:24:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:43,676 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-24 02:24:43,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:24:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-24 02:24:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-24 02:24:43,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:43,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:43,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:24:43,679 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash 787026407, now seen corresponding path program 3 times [2020-10-24 02:24:43,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:43,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17050277] [2020-10-24 02:24:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-24 02:24:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17050277] [2020-10-24 02:24:44,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:44,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:24:44,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848084598] [2020-10-24 02:24:44,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:24:44,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:24:44,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:24:44,133 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 17 states. [2020-10-24 02:24:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:45,360 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-24 02:24:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:24:45,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-24 02:24:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:45,364 INFO L225 Difference]: With dead ends: 74 [2020-10-24 02:24:45,364 INFO L226 Difference]: Without dead ends: 67 [2020-10-24 02:24:45,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:24:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-24 02:24:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-24 02:24:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-24 02:24:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-24 02:24:45,382 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 51 [2020-10-24 02:24:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:45,383 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-24 02:24:45,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:24:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-24 02:24:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 02:24:45,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:45,384 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:45,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:24:45,385 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1994860867, now seen corresponding path program 3 times [2020-10-24 02:24:45,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:45,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366200377] [2020-10-24 02:24:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:45,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:45,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366200377] [2020-10-24 02:24:45,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:45,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:24:45,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722423815] [2020-10-24 02:24:45,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:24:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:24:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:24:45,662 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 17 states. [2020-10-24 02:24:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:46,742 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-24 02:24:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-24 02:24:46,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-24 02:24:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:46,744 INFO L225 Difference]: With dead ends: 90 [2020-10-24 02:24:46,744 INFO L226 Difference]: Without dead ends: 74 [2020-10-24 02:24:46,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:24:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-24 02:24:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-24 02:24:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-24 02:24:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-24 02:24:46,765 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-10-24 02:24:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:46,766 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-24 02:24:46,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:24:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-24 02:24:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-24 02:24:46,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:46,768 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:46,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:24:46,768 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:46,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1591782469, now seen corresponding path program 4 times [2020-10-24 02:24:46,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:46,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025597164] [2020-10-24 02:24:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:47,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:47,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025597164] [2020-10-24 02:24:47,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:47,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 02:24:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870611874] [2020-10-24 02:24:47,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 02:24:47,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:47,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 02:24:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:24:47,118 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 21 states. [2020-10-24 02:24:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:48,579 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-10-24 02:24:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-24 02:24:48,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-10-24 02:24:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:48,581 INFO L225 Difference]: With dead ends: 98 [2020-10-24 02:24:48,581 INFO L226 Difference]: Without dead ends: 82 [2020-10-24 02:24:48,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=508, Invalid=1654, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:24:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-24 02:24:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-24 02:24:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-24 02:24:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-24 02:24:48,624 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 68 [2020-10-24 02:24:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:48,625 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-24 02:24:48,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 02:24:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-24 02:24:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-24 02:24:48,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:48,629 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:48,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:24:48,630 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash -82014275, now seen corresponding path program 5 times [2020-10-24 02:24:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:48,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222208906] [2020-10-24 02:24:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:24:48,678 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:24:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:24:48,730 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:24:48,777 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:24:48,777 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:24:48,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:24:48,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:24:48 BoogieIcfgContainer [2020-10-24 02:24:48,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:24:48,873 INFO L168 Benchmark]: Toolchain (without parser) took 11598.63 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 131.7 MB in the beginning and 186.5 MB in the end (delta: -54.8 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:48,876 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 102.4 MB in the end (delta: 66.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:24:48,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.93 ms. Allocated memory is still 155.2 MB. Free memory was 131.1 MB in the beginning and 121.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:48,878 INFO L168 Benchmark]: Boogie Preprocessor took 36.59 ms. Allocated memory is still 155.2 MB. Free memory was 121.7 MB in the beginning and 120.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:48,880 INFO L168 Benchmark]: RCFGBuilder took 372.76 ms. Allocated memory is still 155.2 MB. Free memory was 120.3 MB in the beginning and 139.0 MB in the end (delta: -18.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:48,885 INFO L168 Benchmark]: TraceAbstraction took 10851.55 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 138.6 MB in the beginning and 186.5 MB in the end (delta: -47.9 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:48,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 102.4 MB in the end (delta: 66.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 317.93 ms. Allocated memory is still 155.2 MB. Free memory was 131.1 MB in the beginning and 121.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.59 ms. Allocated memory is still 155.2 MB. Free memory was 121.7 MB in the beginning and 120.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 372.76 ms. Allocated memory is still 155.2 MB. Free memory was 120.3 MB in the beginning and 139.0 MB in the end (delta: -18.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10851.55 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 138.6 MB in the beginning and 186.5 MB in the end (delta: -47.9 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=6, j=10, n=6] [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [j=10, n=6, n=0] [L24] i=1 VAL [i=1, j=10, n=0, n=6] [L24] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L25] COND TRUE i