/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/modpf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:00:08,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:00:08,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:00:08,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:00:08,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:00:08,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:00:08,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:00:08,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:00:08,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:00:08,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:00:08,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:00:08,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:00:08,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:00:08,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:00:08,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:00:08,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:00:08,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:00:08,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:00:08,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:00:08,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:00:08,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:00:08,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:00:08,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:00:08,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:00:08,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:00:08,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:00:08,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:00:08,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:00:08,100 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 23:00:08,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:00:08,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:00:08,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:00:08,112 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:00:08,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:00:08,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:00:08,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:00:08,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:00:08,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:00:08,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:00:08,113 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:00:08,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:00:08,114 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:00:08,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:00:08,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:00:08,115 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:00:08,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:00:08,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:00:08,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:00:08,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:00:08,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:00:08,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:00:08,116 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 23:00:08,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:00:08,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:00:08,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:00:08,499 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:00:08,499 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:00:08,500 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modpf.c [2020-08-22 23:00:08,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1641fc8e8/cd632bb3eb104b0da822570db2a6bc54/FLAGb900476f6 [2020-08-22 23:00:09,070 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:00:09,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modpf.c [2020-08-22 23:00:09,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1641fc8e8/cd632bb3eb104b0da822570db2a6bc54/FLAGb900476f6 [2020-08-22 23:00:09,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1641fc8e8/cd632bb3eb104b0da822570db2a6bc54 [2020-08-22 23:00:09,414 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:00:09,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:00:09,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:09,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:00:09,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:00:09,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2af7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09, skipping insertion in model container [2020-08-22 23:00:09,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:00:09,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:00:09,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:09,687 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:00:09,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:09,725 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:00:09,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09 WrapperNode [2020-08-22 23:00:09,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:09,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:00:09,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:00:09,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:00:09,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (1/1) ... [2020-08-22 23:00:09,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:00:09,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:00:09,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:00:09,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:00:09,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (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 23:00:09,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:00:09,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:00:09,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:00:09,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:00:09,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:00:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 23:00:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:00:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:00:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:00:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:00:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:00:10,274 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:00:10,275 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 23:00:10,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:10 BoogieIcfgContainer [2020-08-22 23:00:10,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:00:10,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:00:10,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:00:10,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:00:10,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:00:09" (1/3) ... [2020-08-22 23:00:10,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73005b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:10, skipping insertion in model container [2020-08-22 23:00:10,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:09" (2/3) ... [2020-08-22 23:00:10,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73005b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:10, skipping insertion in model container [2020-08-22 23:00:10,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:10" (3/3) ... [2020-08-22 23:00:10,288 INFO L109 eAbstractionObserver]: Analyzing ICFG modpf.c [2020-08-22 23:00:10,298 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:00:10,305 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:00:10,317 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:00:10,338 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:00:10,339 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:00:10,339 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:00:10,339 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:00:10,339 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:00:10,340 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:00:10,340 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:00:10,340 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:00:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-22 23:00:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:10,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:10,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:10,368 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:10,374 INFO L82 PathProgramCache]: Analyzing trace with hash 864246722, now seen corresponding path program 1 times [2020-08-22 23:00:10,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:10,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847302063] [2020-08-22 23:00:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:10,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:10,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:10,658 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 23:00:10,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847302063] [2020-08-22 23:00:10,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:10,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:00:10,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159474510] [2020-08-22 23:00:10,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:00:10,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:10,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:00:10,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:00:10,698 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 3 states. [2020-08-22 23:00:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:10,886 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2020-08-22 23:00:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:00:10,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 23:00:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:10,898 INFO L225 Difference]: With dead ends: 105 [2020-08-22 23:00:10,898 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 23:00:10,903 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 23:00:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 23:00:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 23:00:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 23:00:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-08-22 23:00:10,952 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 33 [2020-08-22 23:00:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:10,953 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-08-22 23:00:10,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:00:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-08-22 23:00:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:10,955 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:10,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:10,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:00:10,956 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:10,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:10,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1269072019, now seen corresponding path program 1 times [2020-08-22 23:00:10,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:10,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153616630] [2020-08-22 23:00:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:11,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:11,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:11,102 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 23:00:11,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153616630] [2020-08-22 23:00:11,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:11,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:00:11,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140811408] [2020-08-22 23:00:11,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:00:11,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:11,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:00:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:00:11,107 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 5 states. [2020-08-22 23:00:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:11,383 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-08-22 23:00:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:00:11,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-22 23:00:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:11,388 INFO L225 Difference]: With dead ends: 92 [2020-08-22 23:00:11,388 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 23:00:11,390 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 23:00:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 23:00:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-08-22 23:00:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 23:00:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-08-22 23:00:11,413 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 33 [2020-08-22 23:00:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:11,414 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-08-22 23:00:11,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:00:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-08-22 23:00:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 23:00:11,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:11,417 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] [2020-08-22 23:00:11,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:00:11,417 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:11,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1661969402, now seen corresponding path program 1 times [2020-08-22 23:00:11,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:11,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987087217] [2020-08-22 23:00:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:11,457 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 23:00:11,457 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-22 23:00:11,458 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:00:11,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:00:11,493 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 23:00:11,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:00:11 BoogieIcfgContainer [2020-08-22 23:00:11,496 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:00:11,504 INFO L168 Benchmark]: Toolchain (without parser) took 2085.44 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 101.7 MB in the beginning and 87.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 77.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:11,507 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:00:11,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.69 ms. Allocated memory is still 136.8 MB. Free memory was 101.5 MB in the beginning and 91.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:11,510 INFO L168 Benchmark]: Boogie Preprocessor took 122.18 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 91.0 MB in the beginning and 177.4 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:11,512 INFO L168 Benchmark]: RCFGBuilder took 430.55 ms. Allocated memory is still 199.8 MB. Free memory was 177.4 MB in the beginning and 157.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:11,514 INFO L168 Benchmark]: TraceAbstraction took 1218.68 ms. Allocated memory is still 199.8 MB. Free memory was 157.9 MB in the beginning and 87.4 MB in the end (delta: 70.5 MB). Peak memory consumption was 70.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:11,529 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.69 ms. Allocated memory is still 136.8 MB. Free memory was 101.5 MB in the beginning and 91.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.18 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 91.0 MB in the beginning and 177.4 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.55 ms. Allocated memory is still 199.8 MB. Free memory was 177.4 MB in the beginning and 157.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1218.68 ms. Allocated memory is still 199.8 MB. Free memory was 157.9 MB in the beginning and 87.4 MB in the end (delta: 70.5 MB). Peak memory consumption was 70.5 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] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 [L30] COND TRUE i