/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark18_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:34:56,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:34:56,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:34:56,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:34:56,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:34:56,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:34:56,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:34:56,909 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 [2021-05-02 13:34:56,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:34:56,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:34:56,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:34:56,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:34:56,943 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:34:56,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:34:56,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:34:56,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:34:56,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:34:56,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:34:56,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:34:56,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:34:56,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:34:56,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:34:56,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:34:56,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:34:56,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:34:56,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:34:56,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:34:56,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:34:56,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:34:57,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:34:57,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:34:57,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:34:57,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:34:57,241 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:34:57,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark18_conjunctive.i [2021-05-02 13:34:57,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a5dd6d0/9481d345dd81429e904c53a9117982e0/FLAG81655fdac [2021-05-02 13:34:57,888 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:34:57,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark18_conjunctive.i [2021-05-02 13:34:57,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a5dd6d0/9481d345dd81429e904c53a9117982e0/FLAG81655fdac [2021-05-02 13:34:58,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a5dd6d0/9481d345dd81429e904c53a9117982e0 [2021-05-02 13:34:58,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:34:58,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:34:58,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:34:58,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:34:58,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:34:58,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50245056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58, skipping insertion in model container [2021-05-02 13:34:58,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:34:58,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:34:58,181 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark18_conjunctive.i[873,886] [2021-05-02 13:34:58,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:34:58,201 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:34:58,210 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark18_conjunctive.i[873,886] [2021-05-02 13:34:58,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:34:58,226 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:34:58,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58 WrapperNode [2021-05-02 13:34:58,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:34:58,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:34:58,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:34:58,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:34:58,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (1/1) ... [2021-05-02 13:34:58,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:34:58,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:34:58,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:34:58,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:34:58,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (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 [2021-05-02 13:34:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:34:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:34:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:34:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:34:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:34:58,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:34:58,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 13:34:58,364 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 13:34:58,364 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:34:58,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:34:58,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:34:58,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 13:34:58,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:34:58,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:34:58,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:34:58,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:34:58,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:34:58,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:34:58,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:34:58,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:34:58,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:34:58,604 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:34:58,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:34:58 BoogieIcfgContainer [2021-05-02 13:34:58,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:34:58,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:34:58,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:34:58,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:34:58,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:34:58" (1/3) ... [2021-05-02 13:34:58,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ceb358d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:34:58, skipping insertion in model container [2021-05-02 13:34:58,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:58" (2/3) ... [2021-05-02 13:34:58,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ceb358d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:34:58, skipping insertion in model container [2021-05-02 13:34:58,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:34:58" (3/3) ... [2021-05-02 13:34:58,610 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark18_conjunctive.i [2021-05-02 13:34:58,614 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:34:58,616 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:34:58,627 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:34:58,657 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:34:58,658 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:34:58,658 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:34:58,658 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:34:58,658 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:34:58,658 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:34:58,658 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:34:58,658 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:34:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:34:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:34:58,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:34:58,672 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:34:58,672 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:34:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:34:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2021-05-02 13:34:58,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:34:58,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646292064] [2021-05-02 13:34:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:34:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:34:58,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:34:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:34:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:34:58,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:34:58,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646292064] [2021-05-02 13:34:58,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646292064] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:34:58,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:34:58,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:34:58,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092809077] [2021-05-02 13:34:58,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:34:58,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:34:58,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:34:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:34:58,886 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:34:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:34:58,973 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-02 13:34:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:34:58,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:34:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:34:58,979 INFO L225 Difference]: With dead ends: 33 [2021-05-02 13:34:58,980 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 13:34:58,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:34:58,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 13:34:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 13:34:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:34:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 13:34:59,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 13:34:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:34:59,010 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 13:34:59,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:34:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 13:34:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 13:34:59,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:34:59,011 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:34:59,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:34:59,012 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:34:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:34:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2021-05-02 13:34:59,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:34:59,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570803196] [2021-05-02 13:34:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:34:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:34:59,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:34:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:34:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:34:59,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:34:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570803196] [2021-05-02 13:34:59,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570803196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:34:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35440502] [2021-05-02 13:34:59,210 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 [2021-05-02 13:34:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:34:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:34:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:34:59,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:34:59,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:34:59,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:34:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:34:59,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35440502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:34:59,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:34:59,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-02 13:34:59,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440302102] [2021-05-02 13:34:59,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:34:59,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:34:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:34:59,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:34:59,487 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 13 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:34:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:34:59,713 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-05-02 13:34:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:34:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 13:34:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:34:59,715 INFO L225 Difference]: With dead ends: 16 [2021-05-02 13:34:59,715 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:34:59,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:34:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:34:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:34:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:34:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:34:59,718 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-05-02 13:34:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:34:59,720 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:34:59,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:34:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:34:59,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:34:59,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:34:59,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:35:00,069 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2021-05-02 13:35:00,069 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 11) no Hoare annotation was computed. [2021-05-02 13:35:00,069 INFO L198 CegarLoopUtils]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-05-02 13:35:00,069 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:35:00,069 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 13:35:00,069 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:35:00,070 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:35:00,070 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:35:00,070 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:35:00,070 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:35:00,070 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 19 29) the Hoare annotation is: true [2021-05-02 13:35:00,070 INFO L198 CegarLoopUtils]: For program point L27(line 27) no Hoare annotation was computed. [2021-05-02 13:35:00,070 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 29) no Hoare annotation was computed. [2021-05-02 13:35:00,070 INFO L198 CegarLoopUtils]: For program point L23(line 23) no Hoare annotation was computed. [2021-05-02 13:35:00,070 INFO L194 CegarLoopUtils]: At program point L24-2(lines 24 26) the Hoare annotation is: (and (< main_~i~0 (+ main_~k~0 1)) (< main_~k~0 (+ main_~n~0 1)) (<= main_~k~0 main_~i~0)) [2021-05-02 13:35:00,070 INFO L194 CegarLoopUtils]: At program point L24-3(lines 24 26) the Hoare annotation is: (and (< main_~i~0 (+ main_~k~0 1)) (<= main_~n~0 main_~k~0) (< main_~k~0 (+ main_~n~0 1)) (<= main_~k~0 main_~i~0)) [2021-05-02 13:35:00,070 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 29) no Hoare annotation was computed. [2021-05-02 13:35:00,070 INFO L198 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-05-02 13:35:00,070 INFO L198 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-05-02 13:35:00,071 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2021-05-02 13:35:00,071 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 18) no Hoare annotation was computed. [2021-05-02 13:35:00,071 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 18) no Hoare annotation was computed. [2021-05-02 13:35:00,071 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-02 13:35:00,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:35:00 BoogieIcfgContainer [2021-05-02 13:35:00,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:35:00,081 INFO L168 Benchmark]: Toolchain (without parser) took 2017.02 ms. Allocated memory is still 189.8 MB. Free memory was 153.9 MB in the beginning and 126.5 MB in the end (delta: 27.4 MB). Peak memory consumption was 28.9 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:00,081 INFO L168 Benchmark]: CDTParser took 2.56 ms. Allocated memory is still 189.8 MB. Free memory is still 170.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:35:00,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.38 ms. Allocated memory is still 189.8 MB. Free memory was 153.7 MB in the beginning and 144.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:00,081 INFO L168 Benchmark]: Boogie Preprocessor took 70.32 ms. Allocated memory is still 189.8 MB. Free memory was 144.2 MB in the beginning and 172.3 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:00,082 INFO L168 Benchmark]: RCFGBuilder took 306.65 ms. Allocated memory is still 189.8 MB. Free memory was 171.8 MB in the beginning and 157.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:00,082 INFO L168 Benchmark]: TraceAbstraction took 1473.67 ms. Allocated memory is still 189.8 MB. Free memory was 157.1 MB in the beginning and 126.5 MB in the end (delta: 30.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:00,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.56 ms. Allocated memory is still 189.8 MB. Free memory is still 170.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 159.38 ms. Allocated memory is still 189.8 MB. Free memory was 153.7 MB in the beginning and 144.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.32 ms. Allocated memory is still 189.8 MB. Free memory was 144.2 MB in the beginning and 172.3 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 306.65 ms. Allocated memory is still 189.8 MB. Free memory was 171.8 MB in the beginning and 157.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1473.67 ms. Allocated memory is still 189.8 MB. Free memory was 157.1 MB in the beginning and 126.5 MB in the end (delta: 30.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1282.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.8ms, AutomataDifference: 333.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 130.3ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25 SDtfs, 21 SDslu, 46 SDs, 0 SdLazy, 66 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 410.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 60 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 38.1ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 216 FormulaSimplificationTreeSizeReductionInter, 78.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 22.0ms SsaConstructionTime, 76.6ms SatisfiabilityAnalysisTime, 488.3ms InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 167 SizeOfPredicates, 1 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (i < k + 1 && k < n + 1) && k <= i RESULT: Ultimate proved your program to be correct! Received shutdown request...