/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/modpf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:42:30,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:30,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:30,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:30,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:30,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:30,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:30,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:30,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:30,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:30,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:30,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:30,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:30,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:30,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:30,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:30,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:30,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:30,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:30,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:30,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:30,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:30,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:30,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:30,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:42:30,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:42:30,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:42:30,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:42:30,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:42:30,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:42:30,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:42:30,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:42:30,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:42:30,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:30,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:30,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:30,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:42:30,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:30,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:30,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:30,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:30,916 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:30,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:30,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:30,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:30,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:30,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:30,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:30,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:30,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:30,917 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:30,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:30,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:30,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:30,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:30,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:30,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:30,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:30,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:30,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:30,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:30,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:30,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:30,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:30,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:30,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:30,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:31,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:31,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:31,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:31,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:31,387 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:31,389 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modpf.c [2020-09-04 13:42:31,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4ce8636c/6ff1d0282ed44ba3a9ebf0a32729f53b/FLAGa70ef099d [2020-09-04 13:42:32,030 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:32,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/modpf.c [2020-09-04 13:42:32,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4ce8636c/6ff1d0282ed44ba3a9ebf0a32729f53b/FLAGa70ef099d [2020-09-04 13:42:32,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4ce8636c/6ff1d0282ed44ba3a9ebf0a32729f53b [2020-09-04 13:42:32,398 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:32,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:32,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:32,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:32,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:32,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55f363a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32, skipping insertion in model container [2020-09-04 13:42:32,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:32,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:32,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:32,698 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:32,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:32,740 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:32,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32 WrapperNode [2020-09-04 13:42:32,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:32,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:32,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:32,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:32,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (1/1) ... [2020-09-04 13:42:32,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:32,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:32,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:32,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:32,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:32,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:32,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:32,972 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:42:32,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:42:32,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:42:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:42:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:42:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 13:42:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:42:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 13:42:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:33,310 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:33,310 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 13:42:33,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:33 BoogieIcfgContainer [2020-09-04 13:42:33,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:33,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:33,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:33,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:33,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:32" (1/3) ... [2020-09-04 13:42:33,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b71220a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:33, skipping insertion in model container [2020-09-04 13:42:33,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:32" (2/3) ... [2020-09-04 13:42:33,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b71220a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:33, skipping insertion in model container [2020-09-04 13:42:33,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:33" (3/3) ... [2020-09-04 13:42:33,327 INFO L109 eAbstractionObserver]: Analyzing ICFG modpf.c [2020-09-04 13:42:33,339 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:33,349 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:33,372 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:33,402 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:33,402 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:33,403 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:33,403 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:33,403 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:33,403 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:33,403 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:33,403 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-04 13:42:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:33,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:33,432 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] [2020-09-04 13:42:33,433 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:33,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-09-04 13:42:33,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:33,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996848047] [2020-09-04 13:42:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:33,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:33,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:33,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996848047] [2020-09-04 13:42:33,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:33,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:42:33,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687563479] [2020-09-04 13:42:33,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:33,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:33,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:33,712 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-09-04 13:42:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:33,860 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-09-04 13:42:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:33,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 13:42:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:33,872 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:42:33,872 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 13:42:33,877 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 [2020-09-04 13:42:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 13:42:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-04 13:42:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-04 13:42:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-09-04 13:42:33,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-09-04 13:42:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:33,924 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-09-04 13:42:33,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-09-04 13:42:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:33,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:33,926 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] [2020-09-04 13:42:33,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:42:33,926 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:33,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-09-04 13:42:33,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:33,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766075833] [2020-09-04 13:42:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:33,958 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:33,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111518620] [2020-09-04 13:42:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:34,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:34,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766075833] [2020-09-04 13:42:34,110 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:34,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111518620] [2020-09-04 13:42:34,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:34,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:42:34,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853425463] [2020-09-04 13:42:34,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:34,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:34,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:34,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:34,114 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-09-04 13:42:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:34,208 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-04 13:42:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:34,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-04 13:42:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:34,213 INFO L225 Difference]: With dead ends: 51 [2020-09-04 13:42:34,213 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 13:42:34,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 13:42:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-09-04 13:42:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 13:42:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-04 13:42:34,229 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-09-04 13:42:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:34,230 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-04 13:42:34,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:34,230 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-04 13:42:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:42:34,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:34,231 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] [2020-09-04 13:42:34,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:42:34,442 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-09-04 13:42:34,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:34,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539653061] [2020-09-04 13:42:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:34,471 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:34,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413135007] [2020-09-04 13:42:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:34,538 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:34,560 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:34,600 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:42:34,601 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:42:34,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:34,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:42:34 BoogieIcfgContainer [2020-09-04 13:42:34,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:42:34,876 INFO L168 Benchmark]: Toolchain (without parser) took 2474.85 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 101.2 MB in the beginning and 96.5 MB in the end (delta: 4.8 MB). Peak memory consumption was 67.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:34,877 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-04 13:42:34,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.86 ms. Allocated memory is still 140.0 MB. Free memory was 101.2 MB in the beginning and 90.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:34,880 INFO L168 Benchmark]: Boogie Preprocessor took 148.03 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 90.7 MB in the beginning and 179.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:34,881 INFO L168 Benchmark]: RCFGBuilder took 426.81 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 163.4 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:34,881 INFO L168 Benchmark]: TraceAbstraction took 1555.02 ms. Allocated memory is still 202.4 MB. Free memory was 162.5 MB in the beginning and 96.5 MB in the end (delta: 66.0 MB). Peak memory consumption was 66.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:34,886 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.86 ms. Allocated memory is still 140.0 MB. Free memory was 101.2 MB in the beginning and 90.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.03 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 90.7 MB in the beginning and 179.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 426.81 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 163.4 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1555.02 ms. Allocated memory is still 202.4 MB. Free memory was 162.5 MB in the beginning and 96.5 MB in the end (delta: 66.0 MB). Peak memory consumption was 66.0 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