/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/s4liff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:43,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:43,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:43,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:43,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:43,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:43,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:43,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:43,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:43,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:43,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:43,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:43,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:43,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:43,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:43,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:43,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:43,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:43,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:43,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:43,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:43,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:43,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:43,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:43,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:43,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:43,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:43,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:43,332 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 16:56:43,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:43,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:43,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:43,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:43,380 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:43,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:43,381 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:43,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:43,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:43,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:43,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:43,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:43,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:43,384 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:43,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:43,385 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:43,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:43,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:43,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:43,385 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:43,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:43,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:43,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:43,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:43,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:43,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:43,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:43,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:43,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:43,389 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:43,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:43,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:43,692 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:43,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:43,694 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:43,694 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4liff.c [2020-08-22 16:56:43,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab71a758/a780e6be6ffa4af2ae1a7685cbb74e43/FLAG3902ae602 [2020-08-22 16:56:44,182 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:44,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4liff.c [2020-08-22 16:56:44,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab71a758/a780e6be6ffa4af2ae1a7685cbb74e43/FLAG3902ae602 [2020-08-22 16:56:44,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab71a758/a780e6be6ffa4af2ae1a7685cbb74e43 [2020-08-22 16:56:44,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:44,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:44,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:44,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:44,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:44,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:44,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa7062e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44, skipping insertion in model container [2020-08-22 16:56:44,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:44,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:44,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:44,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:44,850 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:44,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:44,966 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:44,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44 WrapperNode [2020-08-22 16:56:44,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:44,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:44,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:44,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:44,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:44,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:44,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:44,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:44,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:45,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:45,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (1/1) ... [2020-08-22 16:56:45,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:45,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:45,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:45,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:45,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (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 16:56:45,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:45,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:45,091 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:56:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:56:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:56:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:56:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:56:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:56:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:56:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:56:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:45,439 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:45,440 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:56:45,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:45 BoogieIcfgContainer [2020-08-22 16:56:45,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:45,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:45,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:45,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:45,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:44" (1/3) ... [2020-08-22 16:56:45,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abb6277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:45, skipping insertion in model container [2020-08-22 16:56:45,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:44" (2/3) ... [2020-08-22 16:56:45,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abb6277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:45, skipping insertion in model container [2020-08-22 16:56:45,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:45" (3/3) ... [2020-08-22 16:56:45,452 INFO L109 eAbstractionObserver]: Analyzing ICFG s4liff.c [2020-08-22 16:56:45,462 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:45,469 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:45,483 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:45,507 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:45,507 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:45,508 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:45,508 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:45,508 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:45,508 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:45,508 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:45,508 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 16:56:45,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:56:45,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:45,535 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] [2020-08-22 16:56:45,536 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-08-22 16:56:45,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:45,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8831062] [2020-08-22 16:56:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:45,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:45,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:45,744 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 16:56:45,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8831062] [2020-08-22 16:56:45,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:45,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:45,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832075081] [2020-08-22 16:56:45,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:45,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:45,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:45,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:45,771 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-22 16:56:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:45,877 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-08-22 16:56:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:45,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:56:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:45,888 INFO L225 Difference]: With dead ends: 60 [2020-08-22 16:56:45,888 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 16:56:45,892 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 16:56:45,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 16:56:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 16:56:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 16:56:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-22 16:56:45,929 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-08-22 16:56:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:45,929 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-22 16:56:45,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-22 16:56:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:56:45,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:45,931 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] [2020-08-22 16:56:45,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:56:45,932 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-08-22 16:56:45,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:45,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137956069] [2020-08-22 16:56:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:46,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:46,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:46,086 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 16:56:46,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137956069] [2020-08-22 16:56:46,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:46,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:56:46,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807169549] [2020-08-22 16:56:46,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:56:46,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:56:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:56:46,091 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-08-22 16:56:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:46,224 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-08-22 16:56:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:56:46,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-22 16:56:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:46,226 INFO L225 Difference]: With dead ends: 48 [2020-08-22 16:56:46,226 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 16:56:46,227 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 16:56:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 16:56:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-22 16:56:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 16:56:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-22 16:56:46,237 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-08-22 16:56:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:46,237 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-22 16:56:46,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:56:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-22 16:56:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 16:56:46,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:46,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:46,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:56:46,240 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:46,240 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-08-22 16:56:46,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:46,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76961714] [2020-08-22 16:56:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:46,288 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:46,323 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:46,368 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:56:46,368 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:56:46,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:56:46,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:56:46 BoogieIcfgContainer [2020-08-22 16:56:46,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:56:46,425 INFO L168 Benchmark]: Toolchain (without parser) took 1819.53 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 102.1 MB in the beginning and 100.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:46,426 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:46,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.39 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 101.9 MB in the beginning and 179.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:46,428 INFO L168 Benchmark]: Boogie Preprocessor took 42.53 ms. Allocated memory is still 200.8 MB. Free memory was 179.7 MB in the beginning and 177.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:46,429 INFO L168 Benchmark]: RCFGBuilder took 433.16 ms. Allocated memory is still 200.8 MB. Free memory was 177.1 MB in the beginning and 159.2 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:46,430 INFO L168 Benchmark]: TraceAbstraction took 977.66 ms. Allocated memory is still 200.8 MB. Free memory was 159.2 MB in the beginning and 100.1 MB in the end (delta: 59.1 MB). Peak memory consumption was 59.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:46,435 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.39 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 101.9 MB in the beginning and 179.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.53 ms. Allocated memory is still 200.8 MB. Free memory was 179.7 MB in the beginning and 177.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.16 ms. Allocated memory is still 200.8 MB. Free memory was 177.1 MB in the beginning and 159.2 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 977.66 ms. Allocated memory is still 200.8 MB. Free memory was 159.2 MB in the beginning and 100.1 MB in the end (delta: 59.1 MB). Peak memory consumption was 59.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=10, 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] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = N [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