/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 0.1.25-72570d3 [2020-08-22 22:59:34,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:59:34,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:59:34,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:59:34,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:59:34,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:59:34,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:59:34,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:59:34,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:59:34,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:59:34,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:59:34,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:59:34,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:59:34,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:59:34,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:59:34,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:59:34,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:59:34,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:59:34,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:59:34,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:59:34,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:59:34,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:59:34,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:59:34,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:59:34,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:59:34,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:59:34,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:59:34,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:59:34,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:59:34,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:59:34,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:59:34,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:59:34,283 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:59:34,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:59:34,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:59:34,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:59:34,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:59:34,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:59:34,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:59:34,285 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:59:34,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:59:34,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:59:34,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:59:34,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:59:34,286 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:59:34,286 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:59:34,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:59:34,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:59:34,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:59:34,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:59:34,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:59:34,289 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-08-22 22:59:34,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:59:34,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:59:34,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:59:34,599 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:59:34,600 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:59:34,600 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-22 22:59:34,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8544b91fd/7a8732d18dba4268a7a051d765228872/FLAGa94b7b225 [2020-08-22 22:59:35,165 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:59:35,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-22 22:59:35,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8544b91fd/7a8732d18dba4268a7a051d765228872/FLAGa94b7b225 [2020-08-22 22:59:35,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8544b91fd/7a8732d18dba4268a7a051d765228872 [2020-08-22 22:59:35,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:59:35,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:59:35,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:35,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:59:35,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:59:35,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:35,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bb1976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35, skipping insertion in model container [2020-08-22 22:59:35,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:35,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:59:35,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:59:35,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:35,822 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:59:35,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:35,870 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:59:35,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35 WrapperNode [2020-08-22 22:59:35,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:35,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:59:35,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:59:35,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:59:35,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:35,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:35,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:35,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:35,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:35,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:35,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (1/1) ... [2020-08-22 22:59:36,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:59:36,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:59:36,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:59:36,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:59:36,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (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 [2020-08-22 22:59:36,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:59:36,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:59:36,071 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 22:59:36,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 22:59:36,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:59:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:59:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:59:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 22:59:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 22:59:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:59:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:59:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:59:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:59:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:59:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:59:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:59:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:59:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:59:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:59:36,407 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:59:36,408 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 22:59:36,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:36 BoogieIcfgContainer [2020-08-22 22:59:36,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:59:36,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:59:36,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:59:36,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:59:36,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:59:35" (1/3) ... [2020-08-22 22:59:36,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eec912b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:36, skipping insertion in model container [2020-08-22 22:59:36,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:35" (2/3) ... [2020-08-22 22:59:36,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eec912b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:36, skipping insertion in model container [2020-08-22 22:59:36,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:36" (3/3) ... [2020-08-22 22:59:36,422 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-08-22 22:59:36,433 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:59:36,441 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:59:36,454 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:59:36,478 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:59:36,478 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:59:36,479 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:59:36,479 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:59:36,479 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:59:36,479 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:59:36,479 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:59:36,479 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:59:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-08-22 22:59:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 22:59:36,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:36,512 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] [2020-08-22 22:59:36,512 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-08-22 22:59:36,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:36,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481457260] [2020-08-22 22:59:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:36,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481457260] [2020-08-22 22:59:36,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:36,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:59:36,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768770422] [2020-08-22 22:59:36,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:59:36,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:36,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:59:36,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:59:36,772 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-08-22 22:59:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:36,975 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-08-22 22:59:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:59:36,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 22:59:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:36,988 INFO L225 Difference]: With dead ends: 101 [2020-08-22 22:59:36,988 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 22:59:36,992 INFO L675 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 [2020-08-22 22:59:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 22:59:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-22 22:59:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 22:59:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-08-22 22:59:37,047 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-08-22 22:59:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:37,048 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-08-22 22:59:37,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:59:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-08-22 22:59:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 22:59:37,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:37,050 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] [2020-08-22 22:59:37,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:59:37,051 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:37,052 INFO L82 PathProgramCache]: Analyzing trace with hash -151091841, now seen corresponding path program 1 times [2020-08-22 22:59:37,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:37,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924625033] [2020-08-22 22:59:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:37,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924625033] [2020-08-22 22:59:37,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:37,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:59:37,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852561870] [2020-08-22 22:59:37,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:59:37,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:59:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:59:37,242 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-08-22 22:59:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:37,457 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-08-22 22:59:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:59:37,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 22:59:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:37,459 INFO L225 Difference]: With dead ends: 81 [2020-08-22 22:59:37,460 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 22:59:37,461 INFO L675 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 [2020-08-22 22:59:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 22:59:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-08-22 22:59:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 22:59:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-22 22:59:37,477 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 30 [2020-08-22 22:59:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:37,477 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-22 22:59:37,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:59:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-22 22:59:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 22:59:37,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:37,480 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] [2020-08-22 22:59:37,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:59:37,480 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-08-22 22:59:37,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:37,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143583291] [2020-08-22 22:59:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:59:37,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143583291] [2020-08-22 22:59:37,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:37,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 22:59:37,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368106631] [2020-08-22 22:59:37,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:59:37,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:59:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:59:37,671 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 8 states. [2020-08-22 22:59:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:37,915 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-08-22 22:59:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:59:37,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-22 22:59:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:37,918 INFO L225 Difference]: With dead ends: 66 [2020-08-22 22:59:37,918 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 22:59:37,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:59:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 22:59:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-08-22 22:59:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 22:59:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-22 22:59:37,931 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 42 [2020-08-22 22:59:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:37,932 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-22 22:59:37,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:59:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-22 22:59:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:59:37,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:37,934 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] [2020-08-22 22:59:37,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:59:37,935 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1747495296, now seen corresponding path program 1 times [2020-08-22 22:59:37,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:37,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749949393] [2020-08-22 22:59:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:38,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749949393] [2020-08-22 22:59:38,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:38,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:59:38,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172925574] [2020-08-22 22:59:38,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:59:38,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:38,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:59:38,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:59:38,117 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 10 states. [2020-08-22 22:59:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:38,397 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-08-22 22:59:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:59:38,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-08-22 22:59:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:38,400 INFO L225 Difference]: With dead ends: 94 [2020-08-22 22:59:38,401 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 22:59:38,402 INFO L675 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 [2020-08-22 22:59:38,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 22:59:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-08-22 22:59:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 22:59:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-08-22 22:59:38,427 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 52 [2020-08-22 22:59:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:38,429 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-08-22 22:59:38,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:59:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-08-22 22:59:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 22:59:38,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:38,433 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] [2020-08-22 22:59:38,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:59:38,434 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:38,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1872706551, now seen corresponding path program 2 times [2020-08-22 22:59:38,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:38,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563384045] [2020-08-22 22:59:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 22:59:38,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563384045] [2020-08-22 22:59:38,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:38,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:59:38,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029693655] [2020-08-22 22:59:38,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:59:38,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:38,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:59:38,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:59:38,646 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 6 states. [2020-08-22 22:59:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:38,814 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-08-22 22:59:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:59:38,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-08-22 22:59:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:38,816 INFO L225 Difference]: With dead ends: 94 [2020-08-22 22:59:38,816 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 22:59:38,817 INFO L675 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 [2020-08-22 22:59:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 22:59:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 22:59:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 22:59:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-08-22 22:59:38,828 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-08-22 22:59:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:38,829 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-08-22 22:59:38,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:59:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-08-22 22:59:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 22:59:38,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:38,830 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] [2020-08-22 22:59:38,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:59:38,831 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:38,831 INFO L82 PathProgramCache]: Analyzing trace with hash -557611095, now seen corresponding path program 1 times [2020-08-22 22:59:38,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:38,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046789690] [2020-08-22 22:59:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:59:38,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:59:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:59:38,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:59:38,920 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:59:38,920 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:59:38,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:59:38,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:59:38 BoogieIcfgContainer [2020-08-22 22:59:38,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:59:38,978 INFO L168 Benchmark]: Toolchain (without parser) took 3438.50 ms. Allocated memory was 136.8 MB in the beginning and 249.6 MB in the end (delta: 112.7 MB). Free memory was 99.3 MB in the beginning and 202.7 MB in the end (delta: -103.4 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:38,979 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 136.8 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:59:38,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.77 ms. Allocated memory is still 136.8 MB. Free memory was 99.1 MB in the beginning and 88.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:38,981 INFO L168 Benchmark]: Boogie Preprocessor took 128.42 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 88.6 MB in the beginning and 177.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:38,982 INFO L168 Benchmark]: RCFGBuilder took 412.50 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 158.5 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:38,983 INFO L168 Benchmark]: TraceAbstraction took 2560.24 ms. Allocated memory was 200.3 MB in the beginning and 249.6 MB in the end (delta: 49.3 MB). Free memory was 158.5 MB in the beginning and 202.7 MB in the end (delta: -44.2 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:38,987 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 136.8 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.77 ms. Allocated memory is still 136.8 MB. Free memory was 99.1 MB in the beginning and 88.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.42 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 88.6 MB in the beginning and 177.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 412.50 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 158.5 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2560.24 ms. Allocated memory was 200.3 MB in the beginning and 249.6 MB in the end (delta: 49.3 MB). Free memory was 158.5 MB in the beginning and 202.7 MB in the end (delta: -44.2 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=32, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=2, N=2] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; VAL [\old(N)=0, N=2] [L26] long long sum[1]; VAL [\old(N)=0, N=2, sum={2:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L29] COND TRUE i