/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/loops/trex02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 11:56:03,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 11:56:03,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 11:56:03,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 11:56:03,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 11:56:03,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 11:56:03,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 11:56:03,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 11:56:03,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 11:56:03,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 11:56:03,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 11:56:03,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 11:56:03,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 11:56:03,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 11:56:03,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 11:56:03,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 11:56:03,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 11:56:03,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 11:56:03,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 11:56:03,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 11:56:03,376 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 11:56:03,396 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 11:56:03,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 11:56:03,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 11:56:03,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 11:56:03,398 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 11:56:03,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 11:56:03,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 11:56:03,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 11:56:03,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 11:56:03,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 11:56:03,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 11:56:03,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 11:56:03,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 11:56:03,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 11:56:03,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 11:56:03,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 11:56:03,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 11:56:03,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 11:56:03,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 11:56:03,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 11:56:03,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 11:56:03,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 11:56:03,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 11:56:03,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 11:56:03,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 11:56:03,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 11:56:03,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 11:56:03,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 11:56:03,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 11:56:03,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 11:56:03,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 11:56:03,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 11:56:03,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 11:56:03,703 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 11:56:03,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-1.c [2021-05-02 11:56:03,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ef1c4c4/099ff4a215e2473baf01a3f826c5d9b5/FLAGf1b948f97 [2021-05-02 11:56:04,140 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 11:56:04,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c [2021-05-02 11:56:04,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ef1c4c4/099ff4a215e2473baf01a3f826c5d9b5/FLAGf1b948f97 [2021-05-02 11:56:04,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ef1c4c4/099ff4a215e2473baf01a3f826c5d9b5 [2021-05-02 11:56:04,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 11:56:04,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 11:56:04,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 11:56:04,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 11:56:04,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 11:56:04,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@397f9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04, skipping insertion in model container [2021-05-02 11:56:04,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 11:56:04,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 11:56:04,729 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c[320,333] [2021-05-02 11:56:04,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:56:04,747 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 11:56:04,773 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c[320,333] [2021-05-02 11:56:04,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:56:04,799 INFO L208 MainTranslator]: Completed translation [2021-05-02 11:56:04,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04 WrapperNode [2021-05-02 11:56:04,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 11:56:04,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 11:56:04,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 11:56:04,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 11:56:04,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (1/1) ... [2021-05-02 11:56:04,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 11:56:04,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 11:56:04,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 11:56:04,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 11:56:04,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (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 11:56:04,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 11:56:04,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 11:56:04,881 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 11:56:04,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 11:56:04,881 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-05-02 11:56:04,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 11:56:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 11:56:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 11:56:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 11:56:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 11:56:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 11:56:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 11:56:05,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 11:56:05,108 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 11:56:05,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:56:05 BoogieIcfgContainer [2021-05-02 11:56:05,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 11:56:05,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 11:56:05,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 11:56:05,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 11:56:05,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:56:04" (1/3) ... [2021-05-02 11:56:05,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d81fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:56:05, skipping insertion in model container [2021-05-02 11:56:05,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:56:04" (2/3) ... [2021-05-02 11:56:05,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d81fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:56:05, skipping insertion in model container [2021-05-02 11:56:05,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:56:05" (3/3) ... [2021-05-02 11:56:05,115 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-1.c [2021-05-02 11:56:05,119 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 11:56:05,138 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 11:56:05,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 11:56:05,189 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 11:56:05,189 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 11:56:05,189 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 11:56:05,189 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 11:56:05,189 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 11:56:05,189 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 11:56:05,189 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 11:56:05,189 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 11:56:05,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 11:56:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 11:56:05,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:56:05,204 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:56:05,204 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:56:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:56:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1589172536, now seen corresponding path program 1 times [2021-05-02 11:56:05,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:56:05,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921414480] [2021-05-02 11:56:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:56:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:56:05,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:56:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:56:05,442 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 11:56:05,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:56:05,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921414480] [2021-05-02 11:56:05,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921414480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:56:05,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:56:05,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 11:56:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654532700] [2021-05-02 11:56:05,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 11:56:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:56:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 11:56:05,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:56:05,456 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11:56:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:56:05,509 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 11:56:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 11:56:05,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-02 11:56:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:56:05,517 INFO L225 Difference]: With dead ends: 35 [2021-05-02 11:56:05,517 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 11:56:05,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:56:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 11:56:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 11:56:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 12 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:56:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 11:56:05,554 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2021-05-02 11:56:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:56:05,554 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 11:56:05,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11:56:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 11:56:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 11:56:05,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:56:05,555 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:56:05,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 11:56:05,556 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:56:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:56:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1578090284, now seen corresponding path program 1 times [2021-05-02 11:56:05,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:56:05,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501145168] [2021-05-02 11:56:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:56:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:56:05,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:56:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:56:05,714 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 11:56:05,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:56:05,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501145168] [2021-05-02 11:56:05,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501145168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:56:05,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:56:05,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 11:56:05,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653300727] [2021-05-02 11:56:05,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 11:56:05,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:56:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 11:56:05,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 11:56:05,717 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 11:56:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:56:05,841 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-05-02 11:56:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 11:56:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-05-02 11:56:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:56:05,842 INFO L225 Difference]: With dead ends: 18 [2021-05-02 11:56:05,842 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 11:56:05,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 11:56:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 11:56:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 11:56:05,844 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 11:56:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 11:56:05,844 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-05-02 11:56:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:56:05,845 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 11:56:05,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 11:56:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 11:56:05,845 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 11:56:05,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 11:56:05,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 11:56:05,945 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 11:56:05,946 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 11:56:05,946 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 11:56:05,946 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 11:56:05,946 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~x~0 |old(~x~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 11:56:05,946 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 11:56:05,946 INFO L198 CegarLoopUtils]: For program point fooEXIT(lines 17 19) no Hoare annotation was computed. [2021-05-02 11:56:05,946 INFO L194 CegarLoopUtils]: At program point fooENTRY(lines 17 19) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2021-05-02 11:56:05,946 INFO L198 CegarLoopUtils]: For program point fooFINAL(lines 17 19) no Hoare annotation was computed. [2021-05-02 11:56:05,946 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 11:56:05,946 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~x~0 0) [2021-05-02 11:56:05,946 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 11:56:05,946 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 11:56:05,947 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 21 29) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (<= |old(~x~0)| 0))) [2021-05-02 11:56:05,947 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-05-02 11:56:05,947 INFO L198 CegarLoopUtils]: For program point L25(lines 25 26) no Hoare annotation was computed. [2021-05-02 11:56:05,947 INFO L201 CegarLoopUtils]: At program point L26-1(lines 23 27) the Hoare annotation is: true [2021-05-02 11:56:05,947 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 29) no Hoare annotation was computed. [2021-05-02 11:56:05,947 INFO L201 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: true [2021-05-02 11:56:05,947 INFO L194 CegarLoopUtils]: At program point L23-2(lines 23 27) the Hoare annotation is: (or (<= ~x~0 0) (not (<= |old(~x~0)| 0))) [2021-05-02 11:56:05,947 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 29) no Hoare annotation was computed. [2021-05-02 11:56:05,947 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-02 11:56:05,947 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2021-05-02 11:56:05,947 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 11:56:05,947 INFO L198 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-05-02 11:56:05,947 INFO L198 CegarLoopUtils]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2021-05-02 11:56:05,948 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-05-02 11:56:05,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:56:05 BoogieIcfgContainer [2021-05-02 11:56:05,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 11:56:05,954 INFO L168 Benchmark]: Toolchain (without parser) took 1366.45 ms. Allocated memory is still 220.2 MB. Free memory was 185.0 MB in the beginning and 107.8 MB in the end (delta: 77.2 MB). Peak memory consumption was 76.6 MB. Max. memory is 8.0 GB. [2021-05-02 11:56:05,955 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 220.2 MB. Free memory is still 201.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 11:56:05,955 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.94 ms. Allocated memory is still 220.2 MB. Free memory was 184.8 MB in the beginning and 203.2 MB in the end (delta: -18.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. [2021-05-02 11:56:05,955 INFO L168 Benchmark]: Boogie Preprocessor took 18.59 ms. Allocated memory is still 220.2 MB. Free memory was 203.2 MB in the beginning and 201.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 11:56:05,956 INFO L168 Benchmark]: RCFGBuilder took 289.80 ms. Allocated memory is still 220.2 MB. Free memory was 201.7 MB in the beginning and 188.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 11:56:05,956 INFO L168 Benchmark]: TraceAbstraction took 842.80 ms. Allocated memory is still 220.2 MB. Free memory was 187.5 MB in the beginning and 107.8 MB in the end (delta: 79.7 MB). Peak memory consumption was 78.6 MB. Max. memory is 8.0 GB. [2021-05-02 11:56:05,957 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 220.2 MB. Free memory is still 201.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 209.94 ms. Allocated memory is still 220.2 MB. Free memory was 184.8 MB in the beginning and 203.2 MB in the end (delta: -18.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.59 ms. Allocated memory is still 220.2 MB. Free memory was 203.2 MB in the beginning and 201.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 289.80 ms. Allocated memory is still 220.2 MB. Free memory was 201.7 MB in the beginning and 188.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 842.80 ms. Allocated memory is still 220.2 MB. Free memory was 187.5 MB in the beginning and 107.8 MB in the end (delta: 79.7 MB). Peak memory consumption was 78.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 659.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.0ms, AutomataDifference: 199.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 99.1ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 12 SDslu, 44 SDs, 0 SdLazy, 33 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 174.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.7ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 12 PreInvPairs, 13 NumberOfFragments, 61 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 40.0ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 113 FormulaSimplificationTreeSizeReductionInter, 52.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 8.2ms SsaConstructionTime, 49.9ms SatisfiabilityAnalysisTime, 251.0ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 94 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: 23]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...