/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/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:00:30,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:00:30,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:00:30,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:00:30,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:00:30,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:00:30,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:00:30,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:00:30,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:00:30,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:00:30,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:00:30,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:00:30,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:00:30,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:00:30,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:00:30,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:00:30,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:00:30,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:00:30,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:00:30,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:00:30,299 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 23:00:30,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:00:30,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:00:30,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:00:30,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:00:30,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:00:30,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:00:30,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:00:30,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:00:30,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:00:30,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:00:30,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:00:30,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:00:30,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:00:30,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:00:30,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:00:30,320 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:00:30,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:00:30,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:00:30,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:00:30,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:00:30,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:00:30,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:00:30,321 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 23:00:30,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:00:30,676 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:00:30,680 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:00:30,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:00:30,682 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:00:30,683 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-08-22 23:00:30,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccd09150/a0e8e99e32a14bc68ae79bf23e311ba0/FLAGca564472b [2020-08-22 23:00:31,263 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:00:31,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2020-08-22 23:00:31,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccd09150/a0e8e99e32a14bc68ae79bf23e311ba0/FLAGca564472b [2020-08-22 23:00:31,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccd09150/a0e8e99e32a14bc68ae79bf23e311ba0 [2020-08-22 23:00:31,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:00:31,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:00:31,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:31,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:00:31,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:00:31,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:31,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500f2ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31, skipping insertion in model container [2020-08-22 23:00:31,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:31,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:00:31,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:00:31,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:31,901 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:00:31,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:31,941 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:00:31,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31 WrapperNode [2020-08-22 23:00:31,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:31,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:00:31,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:00:31,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:00:32,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:32,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:32,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:32,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:32,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:32,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:32,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (1/1) ... [2020-08-22 23:00:32,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:00:32,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:00:32,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:00:32,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:00:32,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (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 23:00:32,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:00:32,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:00:32,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:00:32,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:00:32,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:00:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:00:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:00:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:00:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:00:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:00:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 23:00:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:00:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:00:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 23:00:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:00:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:00:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:00:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:00:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:00:32,486 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:00:32,487 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 23:00:32,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:32 BoogieIcfgContainer [2020-08-22 23:00:32,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:00:32,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:00:32,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:00:32,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:00:32,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:00:31" (1/3) ... [2020-08-22 23:00:32,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df93af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:32, skipping insertion in model container [2020-08-22 23:00:32,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:31" (2/3) ... [2020-08-22 23:00:32,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df93af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:32, skipping insertion in model container [2020-08-22 23:00:32,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:32" (3/3) ... [2020-08-22 23:00:32,500 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-08-22 23:00:32,511 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:00:32,518 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:00:32,532 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:00:32,555 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:00:32,555 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:00:32,555 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:00:32,555 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:00:32,556 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:00:32,556 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:00:32,556 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:00:32,556 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:00:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-08-22 23:00:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 23:00:32,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:32,588 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] [2020-08-22 23:00:32,589 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times [2020-08-22 23:00:32,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:32,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972698769] [2020-08-22 23:00:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:32,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:32,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:32,825 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 23:00:32,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972698769] [2020-08-22 23:00:32,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:32,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:00:32,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645443159] [2020-08-22 23:00:32,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:00:32,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:00:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:00:32,849 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-08-22 23:00:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:33,040 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2020-08-22 23:00:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:00:33,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 23:00:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:33,052 INFO L225 Difference]: With dead ends: 113 [2020-08-22 23:00:33,053 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 23:00:33,057 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 23:00:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 23:00:33,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 23:00:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 23:00:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-08-22 23:00:33,104 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31 [2020-08-22 23:00:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:33,105 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-08-22 23:00:33,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:00:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-08-22 23:00:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 23:00:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:33,108 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] [2020-08-22 23:00:33,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:00:33,108 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times [2020-08-22 23:00:33,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:33,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722122465] [2020-08-22 23:00:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:33,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:33,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:33,236 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 23:00:33,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722122465] [2020-08-22 23:00:33,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:33,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:00:33,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307848078] [2020-08-22 23:00:33,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:00:33,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:00:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:00:33,245 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states. [2020-08-22 23:00:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:33,441 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-08-22 23:00:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:00:33,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-22 23:00:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:33,444 INFO L225 Difference]: With dead ends: 99 [2020-08-22 23:00:33,444 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 23:00:33,446 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 23:00:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 23:00:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-08-22 23:00:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 23:00:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-08-22 23:00:33,462 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31 [2020-08-22 23:00:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:33,463 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-08-22 23:00:33,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:00:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-08-22 23:00:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 23:00:33,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:33,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:33,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:00:33,466 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:33,466 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times [2020-08-22 23:00:33,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:33,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616097083] [2020-08-22 23:00:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:34,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:34,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:00:34,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616097083] [2020-08-22 23:00:34,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:34,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 23:00:34,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952796561] [2020-08-22 23:00:34,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 23:00:34,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:34,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 23:00:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:00:34,050 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 20 states. [2020-08-22 23:00:35,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:35,179 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-08-22 23:00:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 23:00:35,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-22 23:00:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:35,186 INFO L225 Difference]: With dead ends: 107 [2020-08-22 23:00:35,187 INFO L226 Difference]: Without dead ends: 101 [2020-08-22 23:00:35,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:00:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-22 23:00:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2020-08-22 23:00:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 23:00:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-08-22 23:00:35,216 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 48 [2020-08-22 23:00:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:35,217 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-08-22 23:00:35,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 23:00:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-08-22 23:00:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 23:00:35,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:35,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:35,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:00:35,220 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1272927570, now seen corresponding path program 1 times [2020-08-22 23:00:35,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:35,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173607103] [2020-08-22 23:00:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:35,263 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 23:00:35,263 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-22 23:00:35,263 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:00:35,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:00:35,287 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 23:00:35,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:00:35 BoogieIcfgContainer [2020-08-22 23:00:35,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:00:35,290 INFO L168 Benchmark]: Toolchain (without parser) took 3654.40 ms. Allocated memory was 147.3 MB in the beginning and 243.8 MB in the end (delta: 96.5 MB). Free memory was 104.1 MB in the beginning and 125.8 MB in the end (delta: -21.6 MB). Peak memory consumption was 74.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:35,291 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:00:35,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.73 ms. Allocated memory is still 147.3 MB. Free memory was 103.9 MB in the beginning and 93.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:35,293 INFO L168 Benchmark]: Boogie Preprocessor took 146.31 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.6 MB in the beginning and 180.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:35,294 INFO L168 Benchmark]: RCFGBuilder took 402.49 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:35,295 INFO L168 Benchmark]: TraceAbstraction took 2794.75 ms. Allocated memory was 203.4 MB in the beginning and 243.8 MB in the end (delta: 40.4 MB). Free memory was 161.0 MB in the beginning and 125.8 MB in the end (delta: 35.3 MB). Peak memory consumption was 75.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:35,299 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.73 ms. Allocated memory is still 147.3 MB. Free memory was 103.9 MB in the beginning and 93.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.31 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.6 MB in the beginning and 180.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.49 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2794.75 ms. Allocated memory was 203.4 MB in the beginning and 243.8 MB in the end (delta: 40.4 MB). Free memory was 161.0 MB in the beginning and 125.8 MB in the end (delta: 35.3 MB). Peak memory consumption was 75.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 [L30] COND TRUE i