/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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:31,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:31,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:31,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:31,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:16:31,823 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:31,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:31,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:31,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:31,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:31,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:31,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:31,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:31,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:31,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:31,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:31,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:31,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:31,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:31,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:31,833 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:31,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:31,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:31,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:31,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:31,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:31,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:31,834 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:32,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:32,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:32,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:32,320 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:32,320 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:32,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-24 00:16:32,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3717ff8c4/afa7ff17df094f018b32814054f0ecff/FLAG87ec38b9f [2021-02-24 00:16:33,087 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:33,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-24 00:16:33,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3717ff8c4/afa7ff17df094f018b32814054f0ecff/FLAG87ec38b9f [2021-02-24 00:16:33,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3717ff8c4/afa7ff17df094f018b32814054f0ecff [2021-02-24 00:16:33,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:33,447 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:33,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:33,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:33,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:33,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524d1609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33, skipping insertion in model container [2021-02-24 00:16:33,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:33,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:33,644 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2021-02-24 00:16:33,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:33,670 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:33,686 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2021-02-24 00:16:33,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:33,709 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:33,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33 WrapperNode [2021-02-24 00:16:33,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:33,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:33,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:33,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:33,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (1/1) ... [2021-02-24 00:16:33,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:33,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:33,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:33,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:33,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:33,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:33,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:33,887 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:33,887 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:16:33,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:33,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:33,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:33,889 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:16:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:33,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:34,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:34,436 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:16:34,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:34 BoogieIcfgContainer [2021-02-24 00:16:34,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:34,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:34,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:34,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:34,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:33" (1/3) ... [2021-02-24 00:16:34,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4571a3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:34, skipping insertion in model container [2021-02-24 00:16:34,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:33" (2/3) ... [2021-02-24 00:16:34,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4571a3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:34, skipping insertion in model container [2021-02-24 00:16:34,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:34" (3/3) ... [2021-02-24 00:16:34,448 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-02-24 00:16:34,456 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:34,461 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:34,485 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:34,512 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:34,512 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:34,512 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:34,513 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:34,513 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:34,513 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:34,513 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:34,513 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-24 00:16:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-24 00:16:34,542 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:34,543 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] [2021-02-24 00:16:34,543 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash -478128650, now seen corresponding path program 1 times [2021-02-24 00:16:34,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:34,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882288145] [2021-02-24 00:16:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:34,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:34,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:34,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:34,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:34,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:34,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:34,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:34,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882288145] [2021-02-24 00:16:34,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:34,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:34,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338528511] [2021-02-24 00:16:34,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:34,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:34,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:34,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:34,898 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2021-02-24 00:16:35,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:35,127 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-02-24 00:16:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:35,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-24 00:16:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:35,144 INFO L225 Difference]: With dead ends: 70 [2021-02-24 00:16:35,144 INFO L226 Difference]: Without dead ends: 39 [2021-02-24 00:16:35,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-24 00:16:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-02-24 00:16:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-24 00:16:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-24 00:16:35,217 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 25 [2021-02-24 00:16:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:35,217 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-24 00:16:35,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-24 00:16:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-24 00:16:35,219 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:35,220 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] [2021-02-24 00:16:35,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:35,220 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:35,222 INFO L82 PathProgramCache]: Analyzing trace with hash -496599070, now seen corresponding path program 1 times [2021-02-24 00:16:35,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:35,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222299036] [2021-02-24 00:16:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:35,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:35,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:35,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:35,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:35,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:35,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:35,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222299036] [2021-02-24 00:16:35,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:35,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:35,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202341032] [2021-02-24 00:16:35,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:35,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:35,466 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2021-02-24 00:16:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:35,777 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-24 00:16:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:16:35,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2021-02-24 00:16:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:35,779 INFO L225 Difference]: With dead ends: 57 [2021-02-24 00:16:35,780 INFO L226 Difference]: Without dead ends: 50 [2021-02-24 00:16:35,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:16:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-24 00:16:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-02-24 00:16:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-24 00:16:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-02-24 00:16:35,797 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2021-02-24 00:16:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:35,798 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-02-24 00:16:35,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-02-24 00:16:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-24 00:16:35,799 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:35,799 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] [2021-02-24 00:16:35,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:35,800 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1797658403, now seen corresponding path program 1 times [2021-02-24 00:16:35,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:35,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264648009] [2021-02-24 00:16:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:35,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:35,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:35,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:35,909 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-24 00:16:35,910 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-24 00:16:35,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:35,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:35,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:35,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:35,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:35,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:35,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264648009] [2021-02-24 00:16:35,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:35,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 00:16:35,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624448376] [2021-02-24 00:16:36,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:16:36,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:36,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:16:36,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:16:36,002 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 7 states. [2021-02-24 00:16:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:36,296 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-02-24 00:16:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:16:36,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-24 00:16:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:36,298 INFO L225 Difference]: With dead ends: 53 [2021-02-24 00:16:36,298 INFO L226 Difference]: Without dead ends: 51 [2021-02-24 00:16:36,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:16:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-24 00:16:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-02-24 00:16:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-24 00:16:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-02-24 00:16:36,315 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2021-02-24 00:16:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:36,316 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-02-24 00:16:36,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:16:36,316 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-02-24 00:16:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:16:36,317 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:36,318 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 00:16:36,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:36,318 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:36,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:36,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1418508499, now seen corresponding path program 1 times [2021-02-24 00:16:36,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:36,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413551936] [2021-02-24 00:16:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:36,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:36,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:36,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:36,388 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 00:16:36,389 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 00:16:36,394 WARN L141 QuantifierPusher]: treesize reduction 12, result has 69.2 percent of original size [2021-02-24 00:16:36,395 WARN L147 QuantifierPusher]: treesize reduction 12, result has 69.2 percent of original size 27 [2021-02-24 00:16:36,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:16:36,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:36,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:36,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:36,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:36,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:36,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-24 00:16:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:36,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:36,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:36,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413551936] [2021-02-24 00:16:36,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:36,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 00:16:36,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031073325] [2021-02-24 00:16:36,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:16:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:16:36,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:16:36,514 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 9 states. [2021-02-24 00:16:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:36,896 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-02-24 00:16:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 00:16:36,896 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-02-24 00:16:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:36,898 INFO L225 Difference]: With dead ends: 64 [2021-02-24 00:16:36,898 INFO L226 Difference]: Without dead ends: 62 [2021-02-24 00:16:36,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:16:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-24 00:16:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-02-24 00:16:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-24 00:16:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-02-24 00:16:36,916 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 36 [2021-02-24 00:16:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:36,917 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-02-24 00:16:36,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:16:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-02-24 00:16:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 00:16:36,918 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:36,919 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:36,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:16:36,919 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1153665475, now seen corresponding path program 1 times [2021-02-24 00:16:36,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:36,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622439481] [2021-02-24 00:16:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:36,941 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:36,961 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:36,996 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:16:36,996 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:36,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:16:37,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:37 BoogieIcfgContainer [2021-02-24 00:16:37,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:37,058 INFO L168 Benchmark]: Toolchain (without parser) took 3622.09 ms. Allocated memory was 168.8 MB in the beginning and 206.6 MB in the end (delta: 37.7 MB). Free memory was 144.8 MB in the beginning and 101.7 MB in the end (delta: 43.1 MB). Peak memory consumption was 82.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:37,058 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 168.8 MB. Free memory is still 143.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:37,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.94 ms. Allocated memory is still 168.8 MB. Free memory was 143.8 MB in the beginning and 134.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:37,060 INFO L168 Benchmark]: Boogie Preprocessor took 40.84 ms. Allocated memory is still 168.8 MB. Free memory was 134.4 MB in the beginning and 132.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:37,061 INFO L168 Benchmark]: RCFGBuilder took 685.04 ms. Allocated memory is still 168.8 MB. Free memory was 132.7 MB in the beginning and 117.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:37,062 INFO L168 Benchmark]: TraceAbstraction took 2616.64 ms. Allocated memory was 168.8 MB in the beginning and 206.6 MB in the end (delta: 37.7 MB). Free memory was 116.5 MB in the beginning and 101.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 54.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:37,065 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 168.8 MB. Free memory is still 143.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 260.94 ms. Allocated memory is still 168.8 MB. Free memory was 143.8 MB in the beginning and 134.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.84 ms. Allocated memory is still 168.8 MB. Free memory was 134.4 MB in the beginning and 132.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 685.04 ms. Allocated memory is still 168.8 MB. Free memory was 132.7 MB in the beginning and 117.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2616.64 ms. Allocated memory was 168.8 MB in the beginning and 206.6 MB in the end (delta: 37.7 MB). Free memory was 116.5 MB in the beginning and 101.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 54.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; VAL [i=0, x=0, y=0] [L20] int n=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, i=0, n=1, x=0, y=0] [L21] COND FALSE !(!(n>0)) VAL [i=0, n=1, x=0, y=0] [L22] i=0 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i