/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:29,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:29,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:29,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:29,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:29,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:29,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:29,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:29,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:29,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:29,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:29,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:29,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:29,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:29,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:29,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:29,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:29,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:29,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:29,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:29,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:29,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:29,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:29,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:29,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:29,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:29,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:29,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:29,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:56:29,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:29,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:29,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:29,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:29,502 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:29,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:29,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:29,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:29,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:29,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:29,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:29,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:29,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:29,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:29,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:29,505 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:29,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:29,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:29,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:29,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:29,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:29,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:29,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:29,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:29,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:29,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:29,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:29,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:29,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:29,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:29,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:29,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:29,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:29,834 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:29,835 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:29,836 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2020-08-22 16:56:29,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515f51bd7/0061c42aef584bcca8ee03b412596093/FLAGbae1638b5 [2020-08-22 16:56:30,369 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:30,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c [2020-08-22 16:56:30,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515f51bd7/0061c42aef584bcca8ee03b412596093/FLAGbae1638b5 [2020-08-22 16:56:30,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515f51bd7/0061c42aef584bcca8ee03b412596093 [2020-08-22 16:56:30,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:30,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:30,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:30,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:30,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:30,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:30" (1/1) ... [2020-08-22 16:56:30,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9d9efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:30, skipping insertion in model container [2020-08-22 16:56:30,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:30" (1/1) ... [2020-08-22 16:56:30,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:30,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:31,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:31,026 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:31,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:31,057 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:31,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31 WrapperNode [2020-08-22 16:56:31,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:31,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:31,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:31,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:31,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (1/1) ... [2020-08-22 16:56:31,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (1/1) ... [2020-08-22 16:56:31,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (1/1) ... [2020-08-22 16:56:31,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (1/1) ... [2020-08-22 16:56:31,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (1/1) ... [2020-08-22 16:56:31,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (1/1) ... [2020-08-22 16:56:31,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (1/1) ... [2020-08-22 16:56:31,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:31,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:31,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:31,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:31,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (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 16:56:31,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:31,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:31,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:56:31,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:56:31,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:56:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:56:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:56:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:56:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:56:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:56:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:31,517 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:31,518 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:56:31,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:31 BoogieIcfgContainer [2020-08-22 16:56:31,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:31,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:31,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:31,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:31,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:30" (1/3) ... [2020-08-22 16:56:31,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f713c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:31, skipping insertion in model container [2020-08-22 16:56:31,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:31" (2/3) ... [2020-08-22 16:56:31,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f713c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:31, skipping insertion in model container [2020-08-22 16:56:31,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:31" (3/3) ... [2020-08-22 16:56:31,533 INFO L109 eAbstractionObserver]: Analyzing ICFG modnf.c [2020-08-22 16:56:31,545 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:31,552 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:31,569 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:31,596 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:31,596 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:31,596 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:31,596 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:31,596 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:31,597 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:31,597 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:31,597 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-22 16:56:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:31,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:31,625 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] [2020-08-22 16:56:31,626 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:31,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-08-22 16:56:31,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:31,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790864807] [2020-08-22 16:56:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:31,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:31,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:31,884 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 16:56:31,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790864807] [2020-08-22 16:56:31,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:31,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:31,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722304777] [2020-08-22 16:56:31,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:31,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:31,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:31,906 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-08-22 16:56:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:32,029 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-08-22 16:56:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:32,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:56:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:32,040 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:56:32,040 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 16:56:32,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 16:56:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 16:56:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-22 16:56:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 16:56:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-08-22 16:56:32,083 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-08-22 16:56:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:32,083 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-08-22 16:56:32,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-08-22 16:56:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:32,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:32,085 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] [2020-08-22 16:56:32,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:56:32,086 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-08-22 16:56:32,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:32,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598783742] [2020-08-22 16:56:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:32,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:32,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:32,221 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 16:56:32,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598783742] [2020-08-22 16:56:32,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:32,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:56:32,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687617431] [2020-08-22 16:56:32,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:56:32,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:32,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:56:32,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:56:32,225 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-08-22 16:56:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:32,366 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-22 16:56:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:56:32,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-22 16:56:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:32,370 INFO L225 Difference]: With dead ends: 51 [2020-08-22 16:56:32,370 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 16:56:32,371 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 16:56:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 16:56:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-08-22 16:56:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 16:56:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-08-22 16:56:32,385 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-08-22 16:56:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:32,385 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-08-22 16:56:32,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:56:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-08-22 16:56:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:56:32,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:32,387 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] [2020-08-22 16:56:32,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:56:32,387 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:32,388 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-08-22 16:56:32,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:32,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825644823] [2020-08-22 16:56:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:32,406 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:32,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735576215] [2020-08-22 16:56:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:32,470 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:32,487 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:32,516 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:56:32,517 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:56:32,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:56:32,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:56:32 BoogieIcfgContainer [2020-08-22 16:56:32,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:56:32,773 INFO L168 Benchmark]: Toolchain (without parser) took 2042.58 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.8 MB in the beginning and 96.7 MB in the end (delta: 6.0 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:32,774 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:32,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.48 ms. Allocated memory is still 140.5 MB. Free memory was 102.6 MB in the beginning and 92.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:32,777 INFO L168 Benchmark]: Boogie Preprocessor took 138.63 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.0 MB in the beginning and 181.4 MB in the end (delta: -89.4 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:32,777 INFO L168 Benchmark]: RCFGBuilder took 325.77 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 164.3 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:32,778 INFO L168 Benchmark]: TraceAbstraction took 1245.72 ms. Allocated memory is still 203.4 MB. Free memory was 163.7 MB in the beginning and 96.7 MB in the end (delta: 66.9 MB). Peak memory consumption was 66.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:32,783 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.48 ms. Allocated memory is still 140.5 MB. Free memory was 102.6 MB in the beginning and 92.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.63 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.0 MB in the beginning and 181.4 MB in the end (delta: -89.4 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.77 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 164.3 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1245.72 ms. Allocated memory is still 203.4 MB. Free memory was 163.7 MB in the beginning and 96.7 MB in the end (delta: 66.9 MB). Peak memory consumption was 66.9 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)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i