/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/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:23:15,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:23:15,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:23:15,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:23:16,044 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 02:23:16,070 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:23:16,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:23:16,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:23:16,076 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:23:16,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:23:16,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:23:16,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:23:16,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:23:16,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:23:16,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:23:16,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:23:16,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:23:16,079 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:23:16,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:23:16,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:23:16,081 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:23:16,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:23:16,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:23:16,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:16,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:23:16,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:23:16,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:23:16,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:23:16,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:23:16,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:23:16,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:23:16,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:23:16,549 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:23:16,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-10-24 02:23:16,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54a8ad6f1/401658f18c6943adad16dfcee1647b36/FLAG05ad542da [2020-10-24 02:23:17,271 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:23:17,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-10-24 02:23:17,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54a8ad6f1/401658f18c6943adad16dfcee1647b36/FLAG05ad542da [2020-10-24 02:23:17,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54a8ad6f1/401658f18c6943adad16dfcee1647b36 [2020-10-24 02:23:17,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:23:17,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:23:17,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:17,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:23:17,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:23:17,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57907db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17, skipping insertion in model container [2020-10-24 02:23:17,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:23:17,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:23:17,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:17,903 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:23:17,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:17,947 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:23:17,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17 WrapperNode [2020-10-24 02:23:17,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:17,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:23:17,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:23:17,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:23:17,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (1/1) ... [2020-10-24 02:23:17,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:23:17,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:23:17,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:23:17,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:23:17,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (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 02:23:18,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:23:18,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:23:18,103 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:23:18,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:23:18,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:23:18,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:23:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:23:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:23:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:23:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:23:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:23:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:23:18,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:23:18,105 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:23:18,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:23:18,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:23:18,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:23:18,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:23:18,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:23:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:23:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:23:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:23:18,424 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:23:18,424 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-24 02:23:18,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:18 BoogieIcfgContainer [2020-10-24 02:23:18,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:23:18,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:23:18,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:23:18,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:23:18,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:17" (1/3) ... [2020-10-24 02:23:18,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206f9e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:18, skipping insertion in model container [2020-10-24 02:23:18,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:17" (2/3) ... [2020-10-24 02:23:18,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206f9e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:18, skipping insertion in model container [2020-10-24 02:23:18,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:18" (3/3) ... [2020-10-24 02:23:18,437 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-10-24 02:23:18,450 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:23:18,456 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:23:18,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:23:18,497 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:23:18,497 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:23:18,498 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:23:18,498 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:23:18,498 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:23:18,498 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:23:18,498 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:23:18,498 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:23:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-24 02:23:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:23:18,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:18,534 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, 1, 1, 1] [2020-10-24 02:23:18,534 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-10-24 02:23:18,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:18,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803883249] [2020-10-24 02:23:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,915 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 02:23:18,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803883249] [2020-10-24 02:23:18,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:18,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:23:18,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391035337] [2020-10-24 02:23:18,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:23:18,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:18,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:23:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:18,946 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-10-24 02:23:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:19,230 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-24 02:23:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:23:19,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-10-24 02:23:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:19,241 INFO L225 Difference]: With dead ends: 111 [2020-10-24 02:23:19,242 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:23:19,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:23:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-24 02:23:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 02:23:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-24 02:23:19,300 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-10-24 02:23:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:19,300 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-24 02:23:19,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:23:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-24 02:23:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:23:19,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:19,303 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, 1, 1, 1] [2020-10-24 02:23:19,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:23:19,303 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-10-24 02:23:19,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:19,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403830802] [2020-10-24 02:23:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,463 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 02:23:19,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403830802] [2020-10-24 02:23:19,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:19,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:23:19,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850552579] [2020-10-24 02:23:19,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:23:19,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:19,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:23:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:23:19,469 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 5 states. [2020-10-24 02:23:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:19,697 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-24 02:23:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:23:19,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-24 02:23:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:19,700 INFO L225 Difference]: With dead ends: 88 [2020-10-24 02:23:19,700 INFO L226 Difference]: Without dead ends: 62 [2020-10-24 02:23:19,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:23:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-24 02:23:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-24 02:23:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-24 02:23:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-24 02:23:19,717 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2020-10-24 02:23:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:19,717 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-24 02:23:19,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:23:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-24 02:23:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 02:23:19,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:19,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:19,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:23:19,720 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:19,721 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-10-24 02:23:19,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:19,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150047293] [2020-10-24 02:23:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:23:19,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150047293] [2020-10-24 02:23:19,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:19,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 02:23:19,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074713113] [2020-10-24 02:23:19,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:23:19,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:19,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:23:19,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:23:19,938 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 8 states. [2020-10-24 02:23:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:20,272 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-24 02:23:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:23:20,273 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-24 02:23:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:20,275 INFO L225 Difference]: With dead ends: 73 [2020-10-24 02:23:20,275 INFO L226 Difference]: Without dead ends: 66 [2020-10-24 02:23:20,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:23:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-24 02:23:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-24 02:23:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-24 02:23:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-24 02:23:20,288 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 48 [2020-10-24 02:23:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:20,289 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-24 02:23:20,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:23:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-24 02:23:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-24 02:23:20,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:20,291 INFO L422 BasicCegarLoop]: trace histogram [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, 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 02:23:20,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:23:20,292 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:20,292 INFO L82 PathProgramCache]: Analyzing trace with hash -20855722, now seen corresponding path program 1 times [2020-10-24 02:23:20,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:20,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568130941] [2020-10-24 02:23:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:20,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568130941] [2020-10-24 02:23:20,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:20,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:23:20,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181451198] [2020-10-24 02:23:20,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:23:20,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:23:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:23:20,507 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 10 states. [2020-10-24 02:23:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:20,827 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-24 02:23:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:23:20,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-24 02:23:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:20,829 INFO L225 Difference]: With dead ends: 101 [2020-10-24 02:23:20,829 INFO L226 Difference]: Without dead ends: 71 [2020-10-24 02:23:20,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:23:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-24 02:23:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-24 02:23:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 02:23:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-24 02:23:20,842 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-10-24 02:23:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:20,843 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-24 02:23:20,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:23:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-24 02:23:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 02:23:20,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:20,845 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:20,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:23:20,845 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:20,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1036949453, now seen corresponding path program 2 times [2020-10-24 02:23:20,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:20,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598151895] [2020-10-24 02:23:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-24 02:23:20,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598151895] [2020-10-24 02:23:20,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:20,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:23:20,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758436635] [2020-10-24 02:23:20,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:23:20,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:20,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:23:20,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:23:20,994 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 6 states. [2020-10-24 02:23:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:21,172 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-24 02:23:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:23:21,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-24 02:23:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:21,173 INFO L225 Difference]: With dead ends: 101 [2020-10-24 02:23:21,174 INFO L226 Difference]: Without dead ends: 69 [2020-10-24 02:23:21,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:23:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-24 02:23:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-24 02:23:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-24 02:23:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-24 02:23:21,186 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-10-24 02:23:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:21,187 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-24 02:23:21,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:23:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-24 02:23:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 02:23:21,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:21,188 INFO L422 BasicCegarLoop]: trace histogram [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, 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 02:23:21,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:23:21,189 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:21,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1144764371, now seen corresponding path program 1 times [2020-10-24 02:23:21,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:21,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240763341] [2020-10-24 02:23:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:21,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:21,249 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:21,282 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:23:21,282 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:23:21,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:23:21,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:23:21 BoogieIcfgContainer [2020-10-24 02:23:21,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:23:21,350 INFO L168 Benchmark]: Toolchain (without parser) took 3697.33 ms. Allocated memory was 162.5 MB in the beginning and 221.2 MB in the end (delta: 58.7 MB). Free memory was 145.6 MB in the beginning and 132.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 72.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:21,350 INFO L168 Benchmark]: CDTParser took 0.93 ms. Allocated memory is still 162.5 MB. Free memory is still 135.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:23:21,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.13 ms. Allocated memory is still 162.5 MB. Free memory was 145.0 MB in the beginning and 135.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:21,352 INFO L168 Benchmark]: Boogie Preprocessor took 42.40 ms. Allocated memory is still 162.5 MB. Free memory was 135.3 MB in the beginning and 133.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:21,353 INFO L168 Benchmark]: RCFGBuilder took 434.96 ms. Allocated memory is still 162.5 MB. Free memory was 133.6 MB in the beginning and 128.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:21,355 INFO L168 Benchmark]: TraceAbstraction took 2918.02 ms. Allocated memory was 162.5 MB in the beginning and 221.2 MB in the end (delta: 58.7 MB). Free memory was 127.9 MB in the beginning and 132.2 MB in the end (delta: -4.2 MB). Peak memory consumption was 56.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:21,359 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.93 ms. Allocated memory is still 162.5 MB. Free memory is still 135.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.13 ms. Allocated memory is still 162.5 MB. Free memory was 145.0 MB in the beginning and 135.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.40 ms. Allocated memory is still 162.5 MB. Free memory was 135.3 MB in the beginning and 133.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 434.96 ms. Allocated memory is still 162.5 MB. Free memory was 133.6 MB in the beginning and 128.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2918.02 ms. Allocated memory was 162.5 MB in the beginning and 221.2 MB in the end (delta: 58.7 MB). Free memory was 127.9 MB in the beginning and 132.2 MB in the end (delta: -4.2 MB). Peak memory consumption was 56.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=2, N=2] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; VAL [\old(N)=0, N=2] [L28] long long sum[1]; VAL [\old(N)=0, N=2, sum={5:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=2, sum={5:0}] [L31] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={5:0}] [L31] COND TRUE i