/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/benchmark32_linear.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:35:10,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:35:10,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:35:10,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:35:10,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:35:10,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:35:10,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:35:10,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:35:10,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:35:10,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:35:10,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:35:10,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:35:10,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:35:10,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:35:10,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:35:10,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:35:10,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:35:10,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:35:10,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:35:10,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:35:10,413 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 13:35:10,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:35:10,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:35:10,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:35:10,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:35:10,461 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:35:10,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:35:10,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:35:10,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:35:10,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:35:10,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:35:10,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:35:10,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:35:10,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:35:10,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:35:10,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:35:10,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:35:10,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:35:10,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:35:10,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:35:10,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:35:10,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:35:10,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:35:10,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:35:10,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:35:10,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:35:10,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:35:10,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:35:10,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:35:10,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:35:10,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:35:10,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:35:10,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:35:10,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:35:10,776 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:35:10,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark32_linear.i [2021-05-02 13:35:10,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78535d14f/474f121aff8b48b09e1933d7aafca313/FLAG5b9801571 [2021-05-02 13:35:11,195 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:35:11,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark32_linear.i [2021-05-02 13:35:11,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78535d14f/474f121aff8b48b09e1933d7aafca313/FLAG5b9801571 [2021-05-02 13:35:11,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78535d14f/474f121aff8b48b09e1933d7aafca313 [2021-05-02 13:35:11,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:35:11,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:35:11,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:35:11,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:35:11,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:35:11,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d762e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11, skipping insertion in model container [2021-05-02 13:35:11,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:35:11,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:35:11,352 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/benchmark32_linear.i[868,881] [2021-05-02 13:35:11,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:35:11,365 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:35:11,375 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/benchmark32_linear.i[868,881] [2021-05-02 13:35:11,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:35:11,422 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:35:11,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11 WrapperNode [2021-05-02 13:35:11,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:35:11,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:35:11,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:35:11,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:35:11,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (1/1) ... [2021-05-02 13:35:11,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:35:11,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:35:11,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:35:11,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:35:11,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (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 13:35:11,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:35:11,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:35:11,533 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:35:11,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:35:11,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:35:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:35:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 13:35:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 13:35:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:35:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:35:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:35:11,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 13:35:11,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:35:11,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:35:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:35:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:35:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:35:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:35:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:35:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:35:11,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:35:11,703 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:35:11,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:35:11 BoogieIcfgContainer [2021-05-02 13:35:11,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:35:11,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:35:11,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:35:11,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:35:11,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:35:11" (1/3) ... [2021-05-02 13:35:11,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a097e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:35:11, skipping insertion in model container [2021-05-02 13:35:11,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:35:11" (2/3) ... [2021-05-02 13:35:11,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a097e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:35:11, skipping insertion in model container [2021-05-02 13:35:11,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:35:11" (3/3) ... [2021-05-02 13:35:11,709 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark32_linear.i [2021-05-02 13:35:11,713 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:35:11,715 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:35:11,725 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:35:11,739 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:35:11,739 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:35:11,739 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:35:11,739 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:35:11,739 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:35:11,739 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:35:11,739 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:35:11,739 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:35:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 13:35:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:35:11,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:35:11,753 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:35:11,753 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:35:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:35:11,756 INFO L82 PathProgramCache]: Analyzing trace with hash -35238852, now seen corresponding path program 1 times [2021-05-02 13:35:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:35:11,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100863321] [2021-05-02 13:35:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:35:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:35:11,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:35:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:35:11,891 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 13:35:11,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:35:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100863321] [2021-05-02 13:35:11,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100863321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:35:11,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:35:11,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:35:11,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042094395] [2021-05-02 13:35:11,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:35:11,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:35:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:35:11,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:35:11,904 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 13:35:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:35:11,935 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 13:35:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:35:11,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 13:35:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:35:11,940 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:35:11,940 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 13:35:11,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:35:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 13:35:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 13:35:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 13:35:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-05-02 13:35:11,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-05-02 13:35:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:35:11,963 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-05-02 13:35:11,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 13:35:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-05-02 13:35:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:35:11,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:35:11,964 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:35:11,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:35:11,965 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:35:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:35:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash -49091667, now seen corresponding path program 1 times [2021-05-02 13:35:11,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:35:11,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112302359] [2021-05-02 13:35:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:35:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:35:12,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:35:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:35:12,068 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 13:35:12,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:35:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112302359] [2021-05-02 13:35:12,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112302359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:35:12,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:35:12,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:35:12,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785815143] [2021-05-02 13:35:12,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:35:12,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:35:12,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:35:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:35:12,071 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 13:35:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:35:12,155 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-05-02 13:35:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:35:12,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 13:35:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:35:12,156 INFO L225 Difference]: With dead ends: 15 [2021-05-02 13:35:12,156 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:35:12,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:35:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:35:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:35:12,157 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 13:35:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:35:12,157 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-05-02 13:35:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:35:12,157 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:35:12,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 13:35:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:35:12,158 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:35:12,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:35:12,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:35:12,226 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2021-05-02 13:35:12,226 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 11) no Hoare annotation was computed. [2021-05-02 13:35:12,226 INFO L198 CegarLoopUtils]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-05-02 13:35:12,226 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:35:12,226 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 13:35:12,226 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:35:12,226 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:35:12,227 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 28) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point L23(lines 23 24) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point L21(line 21) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 28) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 19 28) the Hoare annotation is: true [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point L24(line 24) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L194 CegarLoopUtils]: At program point L24-2(lines 22 25) the Hoare annotation is: (or (= main_~x~0 2) (= main_~x~0 1)) [2021-05-02 13:35:12,227 INFO L194 CegarLoopUtils]: At program point L22-2(lines 22 25) the Hoare annotation is: (or (= main_~x~0 2) (= main_~x~0 1)) [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-05-02 13:35:12,227 INFO L198 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-05-02 13:35:12,228 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2021-05-02 13:35:12,228 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 18) no Hoare annotation was computed. [2021-05-02 13:35:12,228 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 18) no Hoare annotation was computed. [2021-05-02 13:35:12,228 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-02 13:35:12,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:35:12 BoogieIcfgContainer [2021-05-02 13:35:12,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:35:12,239 INFO L168 Benchmark]: Toolchain (without parser) took 1020.33 ms. Allocated memory is still 226.5 MB. Free memory was 190.3 MB in the beginning and 169.1 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:12,239 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 226.5 MB. Free memory is still 206.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:35:12,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.48 ms. Allocated memory is still 226.5 MB. Free memory was 190.1 MB in the beginning and 211.1 MB in the end (delta: -21.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:12,240 INFO L168 Benchmark]: Boogie Preprocessor took 37.04 ms. Allocated memory is still 226.5 MB. Free memory was 211.1 MB in the beginning and 209.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:35:12,240 INFO L168 Benchmark]: RCFGBuilder took 224.17 ms. Allocated memory is still 226.5 MB. Free memory was 209.0 MB in the beginning and 195.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:12,241 INFO L168 Benchmark]: TraceAbstraction took 531.85 ms. Allocated memory is still 226.5 MB. Free memory was 195.4 MB in the beginning and 169.1 MB in the end (delta: 26.3 MB). Peak memory consumption was 27.2 MB. Max. memory is 8.0 GB. [2021-05-02 13:35:12,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 226.5 MB. Free memory is still 206.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 202.48 ms. Allocated memory is still 226.5 MB. Free memory was 190.1 MB in the beginning and 211.1 MB in the end (delta: -21.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.04 ms. Allocated memory is still 226.5 MB. Free memory was 211.1 MB in the beginning and 209.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 224.17 ms. Allocated memory is still 226.5 MB. Free memory was 209.0 MB in the beginning and 195.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 531.85 ms. Allocated memory is still 226.5 MB. Free memory was 195.4 MB in the beginning and 169.1 MB in the end (delta: 26.3 MB). Peak memory consumption was 27.2 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, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 420.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.6ms, AutomataDifference: 133.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 67.2ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 27 SDslu, 19 SDs, 0 SdLazy, 32 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 12.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 43 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 17.1ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 106 FormulaSimplificationTreeSizeReductionInter, 44.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 10.8ms SsaConstructionTime, 32.1ms SatisfiabilityAnalysisTime, 147.7ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 88 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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: 22]: Loop Invariant Derived loop invariant: x == 2 || x == 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...